7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 1/124
S|krn Vj|`r Awlrkbkfw
Lr) Jh`}j|g S) _`llw
Jsskcgj|` ]rkd`sskr" \aj}jr Pigt`rsg|w]j|gjbj !]PIEJO' – :<6 ==<
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 2/124
Js}`c|s ckt`r`l
Vj|`rsa`ls jil |a`gr cajrjc|`rgs|gcs – Lrjgijf` sws|`ns kd vj|`rsa`ls8 Proji vj|`rsa`ls jil Proji s|krn
vj|`r sws|`ns
_jgidjbb" `dd`c|gt` rjgidjbb jil aw`|kfrj}as jil `dd`c|gt` rjgidjbbaw`|kfrj}as
– _jgidjbb jil g|s dj|`8 rjgi djbb `t`i|s jil l`sgfi rjgidjbb `t`i|s8 `dd`c|gt`!i`|' rjgidjbb
– _pikdd jil rpikdd ck`ddgcg`i|8 _jgidjbb.rpikdd nkl`bs8 jil n`|akls kd rpikdd `s|gnj|gkis !PS SCS n`|akl'
– Aw`|kfrj}as jil `dd`c|gt` rjgidjbb aw`|kfrj}as !@_A'
\gn` kd ckic`i|rj|gki – N`|akls kd `s|gnj|gki kd |gn` kd ckic`i|rj|gki5 I_CS |rjt`b |gn`
n`|akl jil I_CS bjf n`|akl
_j|gkijb n`|akl kd }`jh rpi kdd `s|gnj|gki jil I_CS n`|akl kd }`jh rpikdd jil tkbpn` rpikdd `s|gnj|gki
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 3/124
Js}`c|s ckt`r`l Awlrkfrj}as jil awlrkfrj}a jijbwsgs
– \w}`s kd awlrkfrj}as5 Awlrkfrj}as8 S|krn+dbkkl awlrkfrj}as
jil ckn}b`q+ckn}kpil s|krn awlrkfrj}as8 Lgr`c| rpikdd awlrkfrj}as !L_A'8 Pig| awlrkfrj}as" Lgn`isgkib`ss pig|awlrkfrj}a" Swi|a`|gc pig| awlrkfrj}as
– L`rgtgif lgr`c| rpikdd awlrkfrj}as drkn |a` s|krn+dbkklawlrkfrj}as
–
Pig| awlrkfrj}as jil |a`gr l`rgtj|gki8 Swi|a`|gc pig|awlrkfrj}as jil |a`gr l`t`bk}n`i|8 SCS Lgn`isgkib`ss Pig|awlrkfrj}as
– Pig| awlrkfrj}a n`|akl dkr l`rgtgif Lgr`c| rpikdd awlrkfrj}asjil S|krn+dbkkl awlrkfrj}as
Proji s|krn vj|`r8 @s|gnj|gki kd l`sgfi }`jh rpikdd rj|`sjil tkbpn`s8 Zpji|gdgcj|gki kd proji s|krn vj|`rs dkr zpjbg|wnjijf`n`i|
L`sgfi kd s|krn s`v`rs jil k|a`r ckis|g|p`i|s kd ji projis|krn vj|`r lrjgijf` sws|`n8 L`sgfi kd s|krn vj|`r r`|`i|gki
ojsgis8 S|krn vj|`r |r`j|n`i| sws|`ns8 jil Frkpilvj|`rr`cajrf` v`bbs
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 4/124
Awlrkbkfgc cwcb` @tj}k.|rjis}grj|gki !vj|`r tj}kr `i|`rs |a` j|nks}a`r`'
– @tj}krj|gki drkn frkpil jil vj|`r sprdjc`s
–
|rjis}grj|gki ow }bji| b`jt`s Ckil`isj|gki
– Vj|`r cajif`s s|j|` drkn tj}kr |k bgzpgl
– vj|`r tj}kr js g| rgs`s gi |a` jgr" bkks`s `i`rfw jil ckkbs lkvi" jil|a`i cajif`s s|j|` gi|k bgzpgl kr gc`
]r`cg}g|j|gki – Vj|`r o`gif r`b`js`l drkn cbkpls js rjgi" sb``|" sikv kr ajgb
– Kccprs va`i |a` ckil`is`l vj|`r o`ckn`s |kk a`jtw |k r`njgi gi|a` j|nks}a`rgc
Gidgb|rj|gki jil }`rckbj|gki – \a` }kr|gki kd }r`cg}g|j|gki s``}gif gi|k |a` frkpil
– Gi|`rc`}|gki" ̀ tj}krj|gki" s|`n dbkv jil |arkpfa dbkv – Sprdjc` s|krjf`" skgb nkgs|pr` ̀ irgcan`i| jil ̀ tj}krj|gki
– Frkpilvj|`r r`cajrfgif
_pikdd – Sprdjc` rpikdd" gi|`rdbkv $ frkpilvj|`r dbkv !lgr`c| dbkv $ ojs` dbkv'
–
_jgidjbb jil sikv jil gc` n`b| cki|rgop|` vj|`r – Sa``| dbkv" ckic`i|rj|`l sajbbkv dbkv jil cajii`b dbkv
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 5/124
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 6/124
Vj|`rsa`l
L`dgig|gki
L`dgi`l js jbb |a` bjil jr`j |aj| cki|rgop|`s s|krn vj|`r |k |a`vj|`rsa`l kp|b`| !|a` }kgi| kd gi|`r`s| j| vagca kpr l`sgfi o`fgis'
Okpiljrw dkr j vj|`rsa`l gs l`bgi`j|`l |arkpfa psgif
\k}kfrj}agc nj} !vg|a |k}kfrj}agc cki|kprs j| `b`tj|gki |a`gi|`rtjbs kd =)0n kr :)=n kr :)0 n'
Lgfg|jb `b`tj|gki+|k}kfrj}agc lj|j gi |a` dkrn kd frgl c`bbs !kd 3=nr`skbp|gki jil :n `b`tj|gki*' – lgfg|jb |`rrjgi jijbwsgs gs }`rdkrn`ldkr |a` l`bgi`j|gki !FGS'
Vj|`rsa`l l`bgi`j|gki gitkbt`s
Cakksgif |a` vj|`rsa`l kp|b`|
Lrjvgif }`r}`ilgcpbjr bgi`s jcrkss |a` cki|kpr bgi`s |k |a`vj|`rsa`l kp|b`| – jrrkvs lgr`c|`l |kvjrls gicr`jsgif `b`tj|gkijr` ps`l
Proji jr`js |k o` s`rt`l ow j s|krn s`v`rjf` sws|`n cji jbsko` lgtgl`l gi|k j npb|g|pl` kd lrjgijf` jr`js+vj|`rsa`ls
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 7/124
Vj|`rsa`l cajrjc|`rgs|gcs
Cj|can`i| sgu` kr lrjgijf` jr`j jil cj|can`i| saj}`
– Lrjgijf` jr`j !J'5 Bjrf`r |a` lrjgijf` jr`j fr`j|`r vgbb o` |a`tkbpn` kd s|krn vj|`r f`i`rj|`l
Vj|`rsa`l b`if|a" cj|can`i| sbk}` jil cajii`b sbk}` jilsprdjc` rkpfai`ss
–
Vj|`rsa`l b`if|a !B' – kd|`i bjo`b`l js awlrkbkfgc b`if|a – L`dgi`l js |a` lgs|jic` n`jspr`l jbkif |a` }rgicg}jb s|krn
vj|`r dbkv }j|a !}j|a va`r` fr`j|`s| tkbpn` kd vj|`r vkpbl|rjt`b' drkn |a` kp|b`| |k |a` lgtgl` kd |a` ojsgi
Skgb |w}` !|`q|pr`" s|rpc|pr` jil l`fr`` kd lgs|projic`' .
awlrkbkfgc skgb frkp}s .J" .O" .C jil –L
Bjil ps`. gicbpl`s t`f`|j|gki ckt`r !|w}` jil l`isg|w'" crk}|w}`" vkkls" rkjls" `|c)
Ij|prjb s|krjf`5 }kilgif gi ij|prjb l`}r`ssgkis" bjh`s jil
sgngbjr d`j|pr`s . bkcj|gki" cj}jcg|w jil o`ajtgkr kd s|krjf`
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 8/124
Vj|`rsa`l cajrjc|`rgs|gcs
Awlrkbkfgc ckilg|gkis . cji o` }kkr !a`jtgbw frju`l kr ajtgif20=% }bji| ckt`r'" djgr !nkl`rj|`bw frju`l kr ajtgif 60.0=%}bji| ckt`r' kr fkkl !bgfa|bw frju`l kr vg|a 960% }bji| ckt`r')
Ji|`c`l`i| nkgs|pr` ckilg|gkis !gig|gjb l`fr`` kd sj|prj|gki'. cji o` lrw skgb !G'" ikrnjb skgb !GG' jil v`| skgb !GGG'
Ipno`r jil `ddgcg`icw kd vj|`r ckprs`s
F`kbkfw kd |a` vj|`rsa`l jil frkpilvj|`r b`t`bs
Bjil |r`j|n`i| . lgs|rgop|gki kd gn}`rtgkps jil }`rtgkpsckt`r
– gn}`rtgkps jr`j !lgr`c|bw ckii`c|`l jil gilgr`c|bw ckii`c|`l |k|a` lrjgijf` sws|`n'
– Gn}`rtgkps jr`j dbkvgif js ckic`i|rj|`l sajbbkv dbkv ki|k}`rtgkps jr`j $|a`i gi|k lrjgijf` sws|`n gs lgr`c|bw ckii`c|`l
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 9/124
Awlrkbkfgc Skgb Frkp}s !ASF'
ASF.J5 Bkv rpi kdd }k|`i|gjb jil agfa gidgb|rj|gki rj|`s . L``}"v`bb lrjgi`l sjilw+frjt`bbw skgb . Vj|`r |rjisngssgki rj|`s59=)3 gica+ar)
ASF.O5 Nkl`rj|` gidgb|rj|gki+rpikdd rj|`s . Nkl`rj|`bw l``}jil nkl`rj|`bw lrjgigif skgbs . Nkl`rj|`bw dgi` |k nkl`rj|`bw
ckjrs` |`q|pr` . Vj|`r |rjisngssgki rj|`s5 =):0.=)3 gica+ar) ASF.C5 Bkv gidgb|rj|gki rj|`s jil r`bj|gt`bw agfa rpikdd rj|`s .
Skgbs gicbpl` bjw`r gn}`lgif lkvivjrl nkt`n`i| kd vj|`r .Nkl`rj|`bw dgi` |k dgi` skgb |`q|pr` . Vj|`r |rjisngssgki rj|`s5=)=0.=):0 gica+ar)
ASF.L5 Agfa rpikdd }k|`i|gjb jil t`rw bkv gidgb|rj|gki rj|`s .Cbjw skgbs vg|a agfa sv`bbgif }k|`i|gjb" kr skgbs vg|a cbjw }ji krcbjw bjw`r j| kr i`jr sprdjc`" kr sajbbkv skgb kt`r i`jrbwgn}`rtgkps nj|`rgjb . Vj|`r |rjisngssgki rj|`s5 2=)=0 gica+ar
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 10/124
Vj|`rsa`l Cajrjc|`rgs|gcs5 Sbk}`
Jt`rjf` vj|`rsa`l sbk}`
Lgtgl` |a` vj|`rsa`l gi|k lgdd`r`i| sbk}` jr`js jil dgil |a`r`
jr`j drjc|gkis – S`b`c| r`}r`s`i|j|gt` bkcj|gki dkr `jca kd |a` sbk}` jr`js jil
dgil sbk}` gi }`rc`i|
– Npb|g}bw sbk}` jil drjc|gkijb jr`j dkr `jca kd sbk}` jr`js jilspn |a` r`spb|ji| |k ko|jgi v`gfa|`l jt`rjf` vj|`rsa`l sbk}`
Lgtgl` vj|`rsa`l gi|k szpjr` frgls" jil" j| |a` gi|`rs`c|gkiskd frgls n`jspr` sbk}` }`r}`ilgcpbjr |k |a` cki|kprs
– \jh` n`ji sbk}` kd jbb gi|`rs`c|gkis js jt`rjf` vj|`rsa`l sbk}`
Vj|`rsa`l cajii`b sbk}`
_j|` kd cajif` kd `b`tj|gki vg|a r`s}`c| |k lgs|jic` jbkif |a`}rgicg}jb dbkv }j|a
Lgtgl` |a` `b`tj|gki lgdd`r`ic` !o`|v``i |a` `il }kgi|s kd |a` }rgicg}jb dbkv }j|a' vg|a |a` awlrkbkfgc b`if|a !Μ@+B'
\a` `b`tj|gki lgdd`r`ic` njw ik| o` |a` njqgnpn `b`tj|gki
lgdd`r`ic` vg|agi |a` vj|`rsa`l
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 11/124
Vj|`rsa`l Cajrjc|`rgs|gcs5 Saj}`Vj|`rsa`l saj}`
_`db`c|s |a` vjw rpikdd vgbb opica.p} j| |a` vj|`rsa`l kp|b`|
L`}`ilgif ki |a` saj}` tjrgkps }jr|s kd |a` vj|`rsa`ls vgbb r`jca|a` kp|b`| j| lgdd`r`i| |gn`s
Dbkkl }`jhs }rklpc`l tjrw vg|a |a` vj|`rsa`l saj}`
]jrjn`|`rs ps`l dkr l`scrgogif |a` vj|`rsa`l saj}`s
n
k`
n
`
C
C
cj
B
L _
J B
_rj|gkbkifj|gki @
J
J _rj|gk wCgrcpbjrg|
J
]D rj|gk wCgrcpbjrg|
B B B djc|kr Saj}`
0)=
=
0)=
3)=
:
?'!
'!
<'!
)'!
‑Bcj
‗B`if|a |k |a` c`i|`r kd jr`j
‑B‗ gs vj|`rsa`l b`if|a
‑]‗ gs }`rgn`|`r kd |a` vj|`rsa`l
‑J‗ gs jr`j kd |a` vj|`rsa`l
‑J=‗ gs jr`j kd j cgrcb` vg|a |a` sjn`
}`rgn`|`r js |a` vj|`rsa`l‑Bn‗ gs |a` njqgnpn b`if|a kd |a`vj|`rsa`l }jrjbb`b |k |a` }rgicg}jblrjgijf` bgi`
‑Lk gs lgjn`|`r kd j cgrcb` kd sjn` jr`j
Saj}` djc|kr gs ckisgl`r`l js |a` o`s| l`scrg}|kr kd }`jh lgscajrf`
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 12/124
Vj|`rsa`l Cajrjc|`rgs|gcs5Lrjgijf` Sws|`n
Dj|` kd }r`cg}g|j|gki – Gi|`rc`}|gki
@tj}k|rjis}grj|gki
S|`ndbkv jil |arkpfa dbkv |k bjil
– @tj}krj|gki
– Gidgb|rj|gki Skgb nkgs|pr`
Sposprdjc` dbkv !gi|`rdbkv'
]`rckbj|gki |k frkpilvj|`r – Frkpilvj|`r dbkv !ojs` dbkv'
– Sprdjc` rpikdd
Lgr`c| dbkv !sprdjc` rpikdd ( gi|`rdbkv' jil Ojs` dbkv!frkpilvj|`r dbkv'
I`| rjgidjbb – rjgidjbb |aj| gs jtjgbjob` |k dbkv |k |a` kp|b`|
!}r`cg}g|j|gki – bkss`s'
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 13/124
Dj|` kd }r`cg}g|j|gki gi vj|`rsa`ls
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 14/124
Vj|`rsa`l lrjgijf` sws|`n
Sprdjc` rpikdd kd j vj|`rsa`l dbkvs |kvjrls |a` kp|b`|
–Dgrs| js kt`r bjil dbkv
– \a`i js sajbbkv ckic`i|rj|`l dbkv jil
– Dgijbbw js cajii`b dbkv
Sajbbkv }kilgif kd vj|`r !sprdjc` s|krjf`' cji jbsk kccpr !|agsvj|`r gs nks|bw bks| |arkpfa gidgb|rj|gki jil `tj}krj|gki'
Cajii`bs+s|r`jns vj|`rsa`ls njw o` jll`l vg|a gi|`rdbkvsjil ojs` dbkvs
– Cajii`bs cji bks` vj|`r dkr frkpilvj|`r r`cajrfgif" dkrdbkklgif bjil |arkpfa kt`rdbkvgif jil ow `tj}krj|gki
–S|r`jns+cajii`bs cji o` krl`r`l jil vj|`rsa`l ogdprcj|gkirj|gks v`r` ps`l |k l`scrgo` s|r`jns
L`scrgo`l ow |ar`` }jrjn`|`rs" cajii`b b`if|a" cajii`b sbk}`jil lrjgijf` l`isg|w
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 15/124
Vj|`rsa`l b`if|a !B'5
Cajii`b b`if|a !Bc'5
Cajii`b b`if|a !B:=.10'5
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 16/124
Vj|`rsa`l lrjgijf` sws|`n
Cajii`b b`if|a !Bc kr B:=.10'5 –
Bc gs lgs|jic` n`jspr`l jbkif |a` njgi cajii`bdrkn |a` vj|`rsa`l kp|b`| |k |a` `il }kgi| kd |a` cajii`b
– B:=.10 gs lgs|jic` n`jspr`l jbkif |a` njgicajii`b drkn :=% lgs|jic` }kgi| |k 10%lgs|jic` }kgi|
Cajii`b `il }kgi| gl`i|gdgcj|gki gs j spoe`c|gt`|agif
Cajii`b sbk}` !Sc' – Gd |a` cajii`b sbk}` gs ik| pigdkrn |a`i
v`gfa|`l sbk}` gs ckisgl`r`l
Lrjgijf` l`isg|w !L' – _j|gk kd |k|jb b`if|a kd |a` s|r`jns vg|agi |a`
vj|`rsa`l |k |a` |k|jb jr`j kd |a` vj|`rsa`l
\w}gcjb tjbp`s jr` :)0+hn |k 4+hn
Agfa`r tjbp` gilgcj|`s rj}gl s|krn r`s}kis`
J B
L
B
@ S
B
@
S
|
c
cc
10:=
10:=
10:=
∄@c gs `b`tj|gki lgdd`r`ic`o`|v``i bkv`r jil p}}`rcajii`b `ils
∄@:=.10 gs `b`tj|gki
lgdd`r`ic` o`|v``i B:= jil B10 }kgi|s
B| gs |k|jb b`if|a kd jbb |a`s|r`jns kd |a` vj|`rsa`l
J gs vj|`rsa`l jr`j
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 17/124
Vj|`rsa`l lrjgijf` sws|`n
: H
og _ I Ig gs ipno`r kd s|r`jns gi |a` g|a krl`r
‑H‗ gs |a` }rgicg}jb s|r`jn krl`r
_o gs jt`rjf` kd ogdprcj|gki rj|gks kd lgdd`r`i| krl`rs
!Akr|ki l`t`bk}`l' Bjv kd s|r`jn ipno`rs
Ogdprcj|gki rj|gk !_o'5 rj|gk kd |a` ipno`r kd s|r`jns kd jiw krl`r|k |a` ipno`r kd s|r`jns kd |a` i`q| agfa`r krl`r
g
g B B
B _ : :
:
g
Bg _ B B ‑Bg‗ gs jt`rjf` kd b`if|a kd g|a krl`r s|r`jns
_B gs s|r`jn b`if|as rj|gk
!Akr|ki }rk}ks`l' Bjv kd s|r`jn b`if|as !_B'5 _j|gk kd jt`rjf`b`if|as kd |a` s|r`jns kd spcc`ssgt` krl`rs
g
g
J J
J
_:
‑J‗ gs lrjgijf` jr`j kd |a` g
|a
krl`r s|r`jns
!Scapnn }rk}ks`l' Bjv kd s|r`jn jr`js !_J'
S|r`jn krl`r5 N`jspr` kd |a` l`fr`` kd s|r`jn orjicagifvg|agi j vj|`rsa`l
– ‑i|a‗ krl`r s|r`jn gs dkrn`l ow ≠ ? s|r`jns kd !i.:'|a krl`r – Krl`r kd |a` }rgicg}jb cajii`b gs hikvi js }rgicg}jb krl`r
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 18/124
Proji vj|`rsa`ls Cajif`l bjilscj}` jil jb|`r`l lrjgijf` }j||`ris
–S|krn vj|`r lrjgis !r`}bjcgif |a` cajii`bs+s|r`jns kd ij|prjbvj|`rsa`ls'
– _`lpc`l t`f`|j|gki ckt`r" ckicr`|` sprdjc`s" ckn}jc|`l skgbsgki" jil gicr`js`l gn}`rtgkpsi`ss
– I`|vkrh kd rkjls jil drjfn`i|j|gki kd bjil
Opgblgifs" rkkd |k} rjgi vj|`rs jil rjgivj|`r ajrt`s|gifsws|`ns
Cki|jngij|`l s|krn vj|`rs
– S`vjf`
– _pi kdd drkn vjs|` lgs}ksjb sg|`s jil cki|jngij|`l sprdjc`s
Gssp`s jsskcgj|`l vg|a s|krn vj|`rs – ]kilgif+dbkklgif kd cki|jngij|`l s|krn vj|`r !gid`s|`l ow
v``ls" }`s|s" dgb`s jil nkszpg|k`s jil r`b`jsgif ojl klkprs'
– ]`rckbj|gki kd }kbbp|`l s|krn vj|`r !frkpil vj|`r }kbbp|gki'
– ]kbbp|gki kd vj|`r oklg`s jil bjil drkn s|krn vj|`r lgscajrf`s
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 19/124
Proji s|krn vj|`r sws|`ns \a` }pr}ks` gs |k r`nkt` s|krn vj|`r drkn jr`js spca js s|r``|s
jil sgl`vjbhs
\ags sws|`n ckisgs|s kd – Gib`|s
– s|r``| jil rkjlvjw fp||`rs
– rkjlsgl` lg|ca`s
– snjbb cajii`bs jil svjb`s
–
snjbb pil`rfrkpil }g}` sws|`ns Ckbb`c|`l s|krn vj|`r rpikdd gs |rjis}kr|`l |k s|rpc|prjb ON]
djcgbg|g`s
– }`rtgkps jr`js jil+kr |a` njekr lrjgijf` sws|`n !ij|prjb vj|`rvjws"bjrf` nji.njl` ckilpg|s" jil bjrf` vj|`r gn}kpiln`i|s'
L`sgfi crg|`rgj jil fpgljic` ki cknnki lrjgijf` sws|`n
ckn}ki`i|s – S|r``| jil rkjlvjw fp||`rs
– Gib`|s jil s|krn lrjgi }g}` sws|`ns
– Cpbt`r|s
– T`f`|j|`l jil bgi`l k}`i cajii`bs
–@i`rfw lgssg}j|gki l`tgc`s dkr kp|b`| }rk|`c|gki
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 20/124
_jgidjbb _jgidjbb gs cajrjc|`rgu`l ow gi|`isg|w" lprj|gki jil dr`zp`icw
Gi|`isg|w gs l`dgi`l js rj|gk kd rjgidjbb l`}|a |k lprj|gki jil
`q}r`ss`l gi nn+ar Gi|`isg|w `qagog|s s}j|gjb jil |`n}krjb tjrgj|gkis
Dkr snjbb proji vj|`rsa`ls !2?== jcr`s jr`j'" s}j|gjb tjrgj|gkisjr` ckisgl`r`l js i`fbgfgob`
Aw`|kfrj}a !j }bk| kd rjgidjbb gi|`isg|w jfjgis| |gn`' gs ps`l |kl`scrgo` |a` |`n}krjb tjrgj|gkis
_jgidjbb gi|`isg|w gs n`jspr`l ow cki|gipkpsbw r`ckrlgif rjgidjbbki j jp|kfrj}agc rjgi fjpf`
Jrgl jil s`ng.jrgl r`fgki rjgidjbb `t`i|s jr` |w}gcjbbw kd sakr|
lprj|gki" r`bj|gt`bw agfa gi|`isg|w jil kd bgng|`l jr`jb `q|`i| – ckit`i|gkijb rjgis
?=.3=% kccpr j| 9<= nn+ar) gi|`isg|w jil 90=% kd |a` rjgidjbbkccprs j| 9?= nn+ar gi|`isg|w
_jgidjbb r`ckrl gs jtjgbjob` drkn GNL js :0 ngip|`s+ akprbw+
ljgbw rjgidjbb lj|j
+
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 21/124
L`sgfi s|krn+rjgidjbb `t`i|L`sgfi s|krn+rjgidjbb `t`i|5 S|krn `t`i| ps`l js ojsgs dkr |a`
l`sgfi kd j s|krn vj|`r njijf`n`i| sws|`n
Dkpil drkn |a` rjgidjbb r`ckrls dkr j s}`cgdg`l Jiipjb@qc``ljic` ]rkojogbg|w !J@]' jil+kr r`|pri }`rgkl
_`|pri }`rgkl5 Jt`rjf` b`if|a kd |gn` o`|v``i |vk rjgidjbb`t`i|s kd sjn` lprj|gki jil tkbpn`
_`|pri }`rgkl gs |a` git`rs` kd |a` Jiipjb @qc``ljic`
]rkojogbg|w !:=% J@] n`jis := w`jrs r`|pri }`rgkl' Jiipjb @qc``ljic` ]rkojogbg|w !J@]'5 ]rkojogbg|w kd kccprr`ic`
kd j s|krn `t`i| kd j s}`cgdgc lprj|gki jil tkbpn` gi ji w`jr
_`|pri }`rgkl ckisgl`r`l l`}`ils ki r`bj|gt` gn}kr|jic` kd |a` djcgbg|w o`gif l`sgfi`l" cks| kd |a` djcgbg|w" b`t`b kd
}rk|`c|gki l`sgr`l jil ljnjf` r`spb|gif drkn djgbpr`
\w}gcjb r`|pri }`rgkl dkr s|krn s`v`rs l`sgfi gs ?.:= w`jrs
L`sgfi s|krn lprj|gki !|gn` kd ckic`i|rj|gki'5 Lprj|gki kd |a`s|krn r`spb|gif gi |a` bjrf`s| }`jh lgscajrf` dkr fgt`i r`|pri }`rgkl
Gi s|krn s`v`r l`sgfi =): akprs gs |jh`i js |a` ngignpn |gn`kd ckic`i|rj|gki !l`sgfi s|krn lprj|gki'
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 22/124
L`sgfi s|krn+rjgidjbb `t`i| Ko|jgi rjgidjbb `t`i|s !kos`rtj|gkis' gidkrnj|gki dkr 90 w`jrs
_jih |a` jiipjb rjgidjbbs drkn bjrf`s| |k snjbb`s|
@s|gnj|` }rkojogbg|w kd kccprr`ic` ow
]bk| rjih`l kos`rtj|gkis jfjgis| }rkojogbg|w ki ikrnjb}rkojogbg|w }j}`r jil dg| j cprt` !pspjbbw j s|rjgfa| bgi`'
Dgil r`|pri }`rgkl gi w`jrs ow
:==?0)=360)=
in]
N gs rjih kd |a` kos`rtj|gki
i gs |k|jb ipno`r kd rjgidjbb kos`rtj|gkis
\a` dkrnpbj cji o` ps`l dkr i > := |k :==
]\
:==
\ gs r`|pri }`rgkl
] }rkojogbg|w kd kccprr`ic`
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 23/124
_jgidjbb dr`zp`icw s}`c|rpn !_DS' L`dgi`l js |a` lgs|rgop|gki kd jbb rjgidjbb `t`i|s
_jgidjbb tkbpn` drkn jbb |a` s|krn `t`i|s rjifgif drkn |a`snjbb`s|" nks| dr`zp`i| `t`i|s |k |a` bjrf`s|" nks| `q|r`n``t`i|s kt`r j bkif lprj|gki jr` }r`s`i|`l
Ckisgs|s kd cbjss`s kd dr`zp`icg`s" kd|`i orkh`i lkvi owr`|pri }`rgkl rjif`s
– < }rgicg}jb cbjss`s
– \a` |vk snjbb`s|" kr nks| dr`zp`i|" cbjss`s jr` kd|`i r`d`rr`l |kjs vj|`r zpjbg|w s|krns . |a` cki|rkb koe`c|gt`s kd |a`s` s|krnsjr` frkpilvj|`r r`cajrf`" }kbbp|ji| bkjl r`lpc|gki" jil |kcki|rkb kd cajii`b.`rksgki
– \a` |vk bjrf`r" kr b`ss dr`zp`i|" cbjss`s jr` r`d`rr`l |k js
zpji|g|w s|krns . |a` cki|rkb koe`c|gt`s kd |a`s` s|krns jr`cajii`b `rksgki cki|rkb" kt`rojih cki|rkb" jil dbkkl cki|rkb
\a` rpikdd tkbpn` gs |a` nks| gn}kr|ji| dkr |a` vj|`r zpjbg|w}rk|`c|gki jil l`sgfi
\a` rpikdd }`jh rj|` gs |a` nks| gn}kr|ji| dkr lrjgijf`
sws|`n l`sgfi jil dbkklgif jijbwsgs
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 24/124
\w}gcjb dbkkl dr`zp`icw cprt`
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 25/124
L`sgfi S|krn @t`i|s
Snjbb s|krns
S|krns vg|a r`|pri }`rgkl 24 nki|as
Ckisgl`r`l dkr jllr`ssgif |a` s|krn vj|`r zpjbg|w
_`s}kisgob` dkr nks| jiipjb proji rpikdd jil dkr nks| }kbbp|ji|vjsa.kdd drkn proji sprdjc`s !`rkl`l s`lgn`i| gs `qc`}|gki'
N`lgpn s|krns
S|krns vg|a j r`|pri dr`zp`icw kd 4 nki|as |k ? w`jrs
L`|`rngi` |a` sgu` jil saj}` kd |a` r`c`gtgif s|r`jns
Crg|gcjb gi |a` l`sgfi kd ON]s |aj| }rk|`c| s|r`jn cajii`bs drknjcc`b`rj|`l `rksgki jil l`frjlj|gki
Bjrf`r s|krns S|krns vg|a r`|pri dr`zp`icw kd ? |k :== w`jrs !ngikr s|krns5 ? |k
:= w`jr s|krn8 jil njekr s|krns5 9:= w`jr s|krns'
\rjlg|gkijbbw ps`l dkr |a` l`sgfi kd s|krn vj|`r ckit`wjic`djcgbg|g`s !s|krn s`v`rs jil l`|`i|gki ojsgis dkr }`jh lgscajrf`
cki|rkb8 jil |k }r`t`i| bkcjb kt`rojih dbkklgif'
_ g d bb lg g b g d bb
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 26/124
_jgidjbb njss cprt` – lgn`isgkib`ss rjgidjbbnjss cprt` . aw`|kfrj}a
_jgidjbb njss cprt`5 ]bk| kd cpnpbj|gt` rjgidjbb kd jrjgidjbb `t`i| jfjgis| |gn`
Aw`|kfrj}a5 |gn` lgs|rgop|gkikd rjgidjbb gi|`isg|w !gi nnkr cn }`r ar) kr gica }`r ar'kt`r |gn` kd j rjgidjbb `t`i|!r`}r`s`i|`l ow ojr frj}a'
_jgidjbb `t`i|5 J rjgidjbb `t`i|s`}jrj|`l drkn |a` `jrbg`rjil spos`zp`i| rjgidjbb`t`i|s ow ≠4 ars kd ik rjgi
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 27/124
_jgidjbb njss cprt` – lgn`isgkib`ssrjgidjbb njss cprt` . aw`|kfrj}a
_jgidjbb `t`i|s tjrw vgl`bw gi ok|a lprj|gki jil |gn` lgs|rgop|gkikd gi|`isg|w jil ik r`bj|gkisag} `qgs|s o`|v``i |gn`lgs|rgop|gki kd gi|`isg|w jil rjgidjbb `t`i| lprj|gki
\ags njh`s }r`lgc|gki kd |gn` lgs|rgop|gki kd gi|`isg|w kd j rjgidjbb`t`i| gn}kssgob`
\a` I_CS ?<.akpr s|krn lgs|rgop|gkis !\w}` .:" :J" GG $ GGG'L`t`bk}`l ojs`l ki |a` l`}|a.lprj|gki.dr`zp`icw r`bj|gkisag}s
dkr |a` rjgidjbb `t`i|s bjs|gif drkn 3= ngi) |k ?< ars
Psgif 3= ngi) |gn` gicr`n`i|s" rjgidjbb l`}|as jr` jrrjif`l
\a` njq) 3= ngi) l`}|a gs jsspn`l |k kccpr gi |a` ngllb` kd ?<.akpr }`rgkl
\a` i`q| bjrf`s| 3=ngi) l`}|a vjs }bjc`l jd|`r |a` njq) l`}|a
\a` |agrl bjrf`s| l`}|a vjs }bjc`l }rgkr |k |a` njqgnpn l`}|a
\ags }rkc`ss vjs cki|gip`l jil `jca l`cr`jsgif 3= ngi) l`}|a
vjs }bjc`l j| |a` o`fgiigif jil `il kd |a` ?<.akpr rjgidjbb
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 28/124
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 29/124
_jgidjbb njss cprt` – lgn`isgkib`ssrjgidjbb njss cprt` . aw`|kfrj}a
Ki` j}}rkjca |aj| cji o` dkbbkv`l gs ps` kd lgn`isgkib`ssrjgidjbb njss cprt`s
S`t`r` s|krn `t`i|s dkr j }kgi| rjgidjbb nkig|krgif s|j|gki jr`ps`lS|krn `t`i| kd ki` akpr lprj|gki jil ? w`jrs r`|pri }`rgkl
S|krn `t`i| kd 9:)= gica rjgidjbb l`}|aDkr `jca s|krn `q}r`ss ok|a cpnpbj|gt` rjgidjbb l`}|a jil
`bj}s`l |gn` js }`rc`i|jf`s kd |a` |k|jb\jhgif 0 kr :=% |gn` gicr`n`i|s jil dgil :=%" 0=% jil 7=%
tjbp`s dkr `jca kd |a` gicr`n`i|s
Dg| n`ji cprt` !0=%' jil :=% jil 7=% `it`bk}` cprt`s\a` r`spb|ji| cprt`s cji o` ps`l dkr ckis|rpc|gif swi|a`|gc
s|krns kd jiw lprj|gki jil jiw cpnpbj|gt` rjgidjbb l`}|a
Sgngbjrbw aw`|kfrj}a dkr |a` swi|a`|gc s|krn cji o`ckis|rpc|`l
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 30/124
@dd |g !I |' _ g d bb
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 31/124
@dd`c|gt` !I`|' _jgidjbb @dd`c|gt` kr i`| rjgidjbb gs |a` drjc|gki kd rjgidjbb cki|rgop|gif
|k lgr`c| rpikdd !_jgidjbb – _jgidjbb bkss`s'
_jgidjbb bkss`s Gi|`rc`}|gki !ow t`f`|j|gki5 frjss" }bji|s jil |r``s'
Sprdjc` }pllb`s" snjbb jil bjrf` l`}r`ssgkis jil lg|ca`s s|krjf`
Gidgb|rj|gki !gig|gjbbw agfa" rj}glbw l`cr`js`s jil j}}rkjca`s js|`jlw rj|`'
@tj}krj|gki
_jgidjbb gi|`isg|w" va`i `qc``ls gidgb|rj|gki rj|`" rpikdd kccprs
]jr| kd |a` gi|`rc`}|`l vj|`r cji cki|rgop|` |k sprdjc` rpikdd gi|a` dkrn kd s|`n dbkv jil |arkpfa dbkv
]kils jil cajii`bs vg|a vj|`r sakv gidgb|rj|gki `t`i jd|`r |a`
rjgi jil vj|`r bkss |arkpfa `tj}krj|gki jbsk kccprs
Cajii`bs+s|r`jns r`c`gt` }jr| kd |a` gidgb|rj|`l vj|`r jsgi|`rdbkvs jil cajii`bs cji jbsk ajt` ojs` dbkvs
_jgidjbb gs r`bj|`l vg|a rpikdd ow rpikdd ck`ddgcg`i|
jbb _jH _pikd d gid ) H gs rpikdd ck`ddgcg`i|
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 32/124
@dd`c|gt` !I`|' _jgidjbb @dd`c|gt` rjgidjbb l`}`ils ki ok|a sg|`+cj|can`i| s}`cgdgc
tjrgjob`s jil rjgidjbb kr s|krn s}`cgdgc tjrgjob`s
Sg|` s}`cgdgc !cj|can`i|' djc|krs – Skgb |w}` !|`q|pr`" s|rpc|pr` jil l`fr`` kd lgs|projic`'5 Skgb
vj|`r s|krjf` cj}jcg|w jil gidgb|rj|gki rj|`s jr` jdd`c|`l
– Skgb cj}}gif5 crps|gif+scjbgif kd |k} skgb . kccprrgif gi jrgl jils`ng.jrgl r`fgkis . skgbs vg|a agfa cbjw kr bkjn jr` nkr` }rki`
– Cj|can`i| sbk}`5 S|``} sbk}`s wg`bl nkr` rpikdd jil gicr`jsgifsbk}` b`if|as l`cr`js` |a` sprdjc` rpikdd
– Cj|can`i| sgu`5 rpikdd gicr`js`s vg|a l`cr`jsgif sgu` . bjrf`rsgu`s sakv snjbb`r rpikdd ck`ddgcg`i|s
– t`f`|j|gki ckt`r !|w}` jil l`isg|w'5 Gi|`rc`}|s p}|k < nn rjgi.
sag`bls skgb jil jtkgls crps|gif+cj}}gif . rkk|s jil krfjigcnj||`r gicr`js`s }krksg|w . r`|jrls jil r`lpc`s sprdjc` rpikdd
– Ji|`c`l`i| skgb nkgs|pr` !j| |a` kis`| kd |a` s|krn'
– F`kbkfw kd |a` vj|`rsa`l jil frkpilvj|`r b`t`bs
– Ipno`r jil `ddgcg`icw kd vj|`r ckprs`s
S|krn s}`cgdgc tjrgjob`s !gi|`isg|w jil lprj|gki kd |a` s|krn'
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 33/124
_pi kdd ck`ddgcg`i| !H'
Ik| ckis|ji| !`t`i lprgif j s|krn' jil tjrgjob`
!l`t`bk}n`i| jb|`rs g|s tjbp`' H l`rgt`l dkr ki` f`k}awsgcjb bkcj|gki njw ik| o` dg| dkr ps` gi
k|a`r f`k}awsgcjb bkcj|gkis
H kd bjrf`r vj|`rsa`ls jr` ik| ps`l gi snjbb`r vj|`rsa`ls
_jgidjbb jil rpikdd ck`ddgcg`i| jr` r`bj|`l !Ojrgifk cprt`'
– H gs u`rk p}|k c`r|jgi ngignpn |ar`sakbl rjgidjbb tjbp`
\ar`sakbl rjgidjbb l`}`ils ki |a` }awsgcjb cajrjc|`rgs|gcs kd |a`sg|`" bgh`" t`f`|j|gki" l`}r`ssgkis" lgs|projic`s" `|c)
Gig|gjb gidgb|rj|gki rj|`s ckpbl o` agfa`r jil jdd`c|s |a` |ar`sakblrjgidjbb jil |a` rpikdd ck`ddgcg`i|
\ar`sakbl rjgidjbb cji o` 3 |k 9:? nn !dkr skgbs vg|a agfagidgb|rj|gki cj}jcg|w'
– H gicr`js`s vg|a gicr`jsgif rjgidjbb l`}|a !bgi`jr r`bj|gkisag} kibkf.bkf }bk| kd rpikdd djc|kr jil rjgidjbb l`}|a
Va`i lrjgijf` jr`j gitkbt`s j cknogij|gki kd ck`ddgcg`i|s jv`gfa|`l jt`rjf` kd |a` rpikdd ck`ddgcg`i|s nps| o` ps`l
jbb _jH _pikd d gid )
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 34/124
Ojrgifk cprt`
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 35/124
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 36/124
_pikdd ck`ddgcg`i|s
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 37/124
@dd`c|gt` !I`|' _jgidjbb
Cjbcpbj|`l ow \a` ь gil`q n`|akl
– _jgidjbb bkss`s jr` ckisgl`r`l ckis|ji||arkpfakp| |a` rjgidjbb lprj|gki
_jgidjbb bkss`s jr` lgtgl`l gi|k
– gig|gjb bkss`s !j||rgop|`l |k gi|`rc`}|gkijil bjil sprdjc` s|krjf`'
– cki|gipgif bkss`s !ckis|ji|'
_jgidjbb bkss`s jr` ckisgl`r`l }rk}kr|gkijb
|k |a` rjgidjbb gi|`isg|w |arkpfakp| |a`rjgidjbb }`rgkl
@s|gnj|gif |a` i`|+`dd`c|gt` rjgidjbb ow skgbnkgs|pr` jcckpi|gif nkl`bs
– [email protected] ps`r njipjb !A@C" ?==7' ]rk}kr|gkijb bkss`s
Gig|gjb $ cki|gipgif bkss`s
ь gil`q n`|akl
_jgidjbb _pikdd Nkl`bs
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 38/124
_jgidjbb . _pikdd Nkl`bs _jgidjbb lj|j cji o` ckit`r|`l gi|k rpikdd lj|j |arkpfa psgif
rjgidjbb.rpikdd nkl`bs
\vk j}}rkjca`s" cki|gipkps sgnpbj|gki j}}rkjca jil sgifb`
`t`i| l`sgfi s|krn j}}rkjca" jr` ps`l Cki|gipkps sgnpbj|gki j}}rkjca5
– carkikbkfgcjb r`ckrl kd rjgidjbb gs ps`l js gi}p| jil |a` nkl`bfgt`s carkikbkfgcjb r`ckrl kd rpikdd js kp|}p|
– Drkn |a` kp|}p| njqgnpn }`jh rpikdd jil |k|jb rpikdd tkbpn`dkr j s`b`c|`l l`sgfi }`rgkl jr` ko|jgi`l
– SVNN !ts) 0'" @]J jil [email protected] jr` |a` nkl`bs jtjgbjob`
Sgifb` `t`i| l`sgfi s|krn j}}rkjca
– _jgidjbb r`ckrl gs jijbwu`l |k ko|jgi rjgidjbb.r`|pri }`rgkl
r`bj|gkisag} jil l`sgfi s|krn `t`i| gs gl`i|gdg`l drkn |a`r`bj|gkisag} dkr j l`sgfi r`|pri }`rgkl
– \a` l`sgfi s|krn `t`i| gs ps`l js gi}p| gi |a` rjgidjbb.rpikdd nkl`b jil l`sgfi rpikdd !}`jh rpikdd jil+kr tkbpn`' gsko|jgi`l js kp|}p|
– _j|gkijb n`|akl !I_CS VGI\_.00' gs `qjn}b` – }r`d`rr`l dkrsnjbb proji cj|can`i|s
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 39/124
_jgidjbb._pikdd Nkl`bs
@dd`c|s kd `tj}k.|rjis}grj|gki" jil gi|`rjc|gki o`|v``ijzpgd`r jil s|r`jns" jr` gfikr`l . `dd`c|s kd gi|`rc`}|gki jill`}r`ssgki s|krjf` jr` jbsk i`fb`c|`l
Njfig|pl` kd `tj}k.|rjis}grj|gki lprgif |a` s|krn }`rgkl gsi`fbgfgob`
_`s}kis` |gn` kd |a` sposprdjc` skgb sws|`n gs npca bkif`r|aji |a` r`s}kis` |gn` kd sprdjc` kr lgr`c| rpikdd }rkc`ss
K|a`r n`|akls kd rpikdd `s|gnj|gkis
P)S) F`kbkfgcjb Sprt`w !PSFS' r`fr`ssgki `zpj|gkis
Snjbb s|krn awlrkbkfw n`|akls !vj|`r zpjbg|w |r`j|n`i|tkbpn` – VZt jil vj|`r zpjbg|w cj}|pr` tkbpn` cjbcpbj|gkis'
Bkv.gn}jc| l`t`bk}n`i| !BGL' awlrkbkfgc n`|akls
Vj|`r ojbjic` cjbcpbj|gkis
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 40/124
PS SCS n`|akl Skgb Ckis`rtj|gki S`rtgc` N`|akl !Cprt` Ipno`r –CI
N`|akl'. :76? !dkr }`jh rpikdd rj|`s jil tkbpn`s'
Ji `n}grgcjb nkl`b . Fkkl dkr snjbb vj|`rsa`ls
\jh`s gi|k jcckpi| |a` }k|`i|gjb kd skgb |k joskro+s|kr` vj|`rkr nkgs|pr` !S' . gi|`rc`}|gki" l`}r`ssgki s|krjf` $ gidgb|rj|gki
]k|`i|gjb s|krjf` !S' gs r`bj|`l |k cprt` ipno`r
@dd`c|gt` rjgidjbb gs `s|gnj|`l js
Gj gs kd|`i `q}r`ss`l js drjc|gki !d j' kd |a` }k|`i|gjb s|krjf` ‑s‗
j|
j| |
G S ] G ]Z
?‑Z |‗ gs `dd`c|gt` rjgidjbb l`}|a gi |gn` ‑|‗
‑]|‗ gs jccpnpbj|`l l`}|a kd rjgidjbb gi |gn` ‑|‗ ‑Gj‗ gs gig|gjb jos|rjc|gki o`dkr̀ rpikdd !:=% kr ?=% kd ‑S‗'
‑S‗ gs }k|`i|gjb s|krjf` gi |a` skgb
?0<?0<==
CI
S ‑S‗ gs }k|`i|gjb s|krjf` gi |a` skgb gi nn
‑CI‗ gs Cprt` Ipno`r !rjif` drkn = |k :=='
S
G
d
j
j
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 41/124
Skbp|gki kd |a` I_CS rpikdd `zpj|gki
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 42/124
_pikdd l`}|a dkr s`b`c|`l CI‗s jil rjgidjbb jnkpi|s:
C I o
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 43/124
Cprt` Ipno`r Jssgfi`l ki |a` ojsgs kd
Skgb |w}` !awlrkbkfgc skgb frkp}s .J" .O" .C jil .L 8 _pikdd
}k|`i|gjb gicr`js`s drkn .J |k .L frkp}s' Bjil ps`. cji o` crk} |w}`" vkkls" rkjls" `|c)
Awlrkbkfgc ckilg|gkis . cji o` }kkr !a`jtgbw frju`l kr ajtgif20=% }bji| ckt`r'" djgr !nkl`rj|`bw frju`l kr ajtgif 60.0=%}bji| ckt`r' kr fkkl !bgfa|bw frju`l kr vg|a 960% }bji| ckt`r')
Ji|`c`l`i| nkgs|pr` ckilg|gkis !gig|gjb l`fr`` kd sj|prj|gki' .cji o` lrw skgb !G'" ikrnjb skgb !GG' jil v`| skgb !GGG'
Bjil sbk}` jil bjil |r`j|n`i| jbsk gidbp`ic`s |a` CI
Kd|`i zpk|`l js j dpic|gki kd |a` % gn}`rtgkps jr`j
–
CIgn}`rtgkps > 71 – CI}`rtgkps > CI dkr j }js|pr` gi fkkl ckilg|gki dkr tjrgkps |w}`s kd skgbs
Tjrg`s o`|v``i = jil :== != dkr bkv rpikdd }k|`i|gjb jil :==dkr agfa rpikdd }k|`i|gjb'
Lgdd`r`i| spojr`js kd j vj|`rsa`l cji ajt` lgdd`r`i| CI – gispca cjs`s jr`j v`gfa|`l jt`rjf` kd CI gs ps`l
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 44/124
Cprt` Ipno`r jil Awlrkbkfgc Skgb Frkp}s < awlrkbkfgc skgb frkp}s !ASF.J" ASF.O" ASF.C jil ASF.L' jr` gl`i|gdg`l
ASF.J
– Bkv rpi kdd }k|`i|gjb jil agfa gidgb|rj|gki rj|`s – L``}" v`bb lrjgi`l sjilw+frjt`bbw skgb
– Vj|`r |rjisngssgki rj|`s5 9=)3 gica+ar)
ASF.O – Nkl`rj|` gidgb|rj|gki+rpikdd rj|`s
– Nkl`rj|`bw l``} jil nkl`rj|`bw lrjgigif skgbs
– Nkl`rj|`bw dgi` |k nkl`rj|`bw ckjrs` skgb |`q|pr`
– Vj|`r |rjisngssgki rj|`s5 =):0 |k =)3 gica+ar)
ASF.C – Bkv gidgb|rj|gki rj|`s jil r`bj|gt`bw agfa rpikdd rj|`s
– Skgbs gicbpl` bjw`r gn}`lgif lkvivjrl nkt`n`i| kd vj|`r
– Nkl`rj|`bw dgi` |k dgi` skgb |`q|pr`
– Vj|`r |rjisngssgki rj|`s5 =)=0.=):0 gica+ar)
ASF.L – Agfa rpikdd }k|`i|gjb jil t`rw bkv gidgb|rj|gki rj|`s
– Cbjw skgbs vg|a agfa sv`bbgif }k|`i|gjb" kr skgbs vg|a cbjw }ji kr cbjw bjw`r j| kri`jr |a` sprdjc`" kr sajbbkv skgb kt`r i`jrbw gn}`rtgkps nj|`rgjb
–
Vj|`r |rjisngssgki rj|`s5 =)= |k =)=0 gica+ar
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 45/124
PS SCS N`|akl dkr @dd`c|gt` !I`|' _jgidjbb
11==
??==
==??==
CI ]
CI ]
]k|a`rvgs`
]CI
]Dkr
@qc`ss
@qc`ss
] gs }r`cg}g|j|gki+rjgidjbb
]`qc`ss gs }r`cg}g|j|gki+rjgidjbb `qc`ss
CI gs cprt` ipno`r
@qc`ss !I`|' rjgidjbb gs ko|jgi`l drkn }r`cg}g|j|gki
GG CI
GG CI GGG CI
GG CI
GG CI G CI
:3)=:=
3)?
=01)=:=
?)<
Ji|`c`l`i| Nkgs|pr`+_pikdd Ckilg|gkis !JNC+J_C'
JNC.G5 lrw skgb vg|a bkv cprt` Ipno`r Tjbp`JNC.GG5 ikrnjb skgb vg|a nkl`rj|̀ Cprt` Ipno`r tjbp`
JNC.GGG5 v`| skgb vg|a agfa Cprt` Ipno`r tjbp`
Cprt` Ipno`r tjbp`s jr` pspjbbw jtjgbjob` dkr JNC.GG
ckilg|gkis jil ckrr`c|`l |k JNC.G kr JNC.GG js r`zpgr`l ow
`
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 46/124
I
_ C S r p i k d d C I d
k r s ` b ` c | ` l
c p b
| g t j | ` l
j f r g c p b | p r j b b j i l
p s `
I_CS rpikdd CI dkr k|a`r jfrgcpb|prjb bjil ps`:
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 47/124
f
s `
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 48/124
I _
C S r p i k d d c p r t
` i p n o ` r s ! C I
' d k r s ` b ` c | ` l p
r o j i b j i l p
Projiguj|gki jdd̀ c|s |a` CI
|arkpfa skgb ckn}jc|gki |k
lgdd`r`i| b`t`bs jil |arkpfafrjlgif kd skgb gitkbtgif
ngqgif kd sprdjc` jil spo.
sprdjc` skgbs
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 49/124
Ckn}p|gif CI dkr l`t`bk}`l proji jr`js
CI tjbp`s jtjgbjob` dkr proji jr`js jr` pspjbbw dkr
– Dgq`l }`rc`i| kd gn}`rtgkps jr`j !?0%*' jil |a` gn}`rtgkpsjr`js jr` jsspn`l js lgr`c|bw ckii`c|`l |k |a` lrjgijf` sws|`n
– ]`rtgkps proji jr`js jr` |jh`i js `zpgtjb`i| |k }js|pr`s gi fkklawlrkbkfgc ckilg|gki
Gd |a` }`rc`i| gn}`rtgkps jr`j gs lgdd`r`i|" |a`i |a` cprt` ipno`rsakpbl o` ckrr`c|`l –iknkfrj}as jr` jtjgbjob` dkr |a`ckrr`c|gki)
Ji gn}`rtgkps jr`j gs ckisgl`r`l js lgr`c|bw ckii`c|`l
– Gd g|s rpikdd dbkvs lgr`c|bw gi|k |a` lrjgijf` sws|`n kr
– Gd g| dbkvs js ckic`i|rj|`l sajbbkv dbkv ki|k }`rtgkps jr`js jil|a`i |k |a` lrjgijf` sws|`n
Gd gilgr`c|bw ckii`c|`l gn}`rtgkps jr`js `qgs|" |a`i jbsk |a` CIsakpbl o` ckrr`c|`l – iknkfrj}as jr` jtjgbjob` dkr |a`ckrr`c|gki
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 50/124
Ckn}ksg|` CI vg|a ckii`c|`l gn}`rtgkps jr`js
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 51/124
Ckn}ksg|` CI vg|a pickii`c|`l gn}`rtgkps jr`js
!|k|jb gn}`rtgkps jr`j b`ss |aji 3=%'
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 52/124
Cprt` Ipno`r
Cprt` Ipno`r gs |a` dpic|gki kd
– _pikdd ck`ddgcg`i| !C' – \k|jb rjgidjbb l`}|a !]|'
– Gi|gjb jos|rjc|gki rj|gk !d j>Gj+S'
\a` r`bj|gkisag} cji o` sakvi js
\a` I_CS rpikdd `zpj|gki !CI n`|akl kr PS SCS rpikdd `zpj|gki' gs cknogi`l vg|a pig| awlrkfrj}a |a`krw dkr |a`ckn}p|j|gki kd }`jh dbkv rj|`s jil tkbpn`s
\a` rpi kdd `zpj|gki fgt`s |a` rpikdd l`}|a jil dkr bkv`rrjgidjbbs jil+kr snjbb`r CI tjbp`s |a` rpikdd l`}|a gs u`rk
?
:
??
:
:
<::
?
:::=
:===
C d
d C
d
d
d ]
CI
j
j
j
j
j
|
\gn` kd ckic`i|rj|gki !| '
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 53/124
\gn` kd ckic`i|rj|gki !|c' \gn` r`zpgr`l dkr |a` `i|gr` vj|`rsa`l |k cki|rgop|` |k rpikdd
j| |a` }kgi| kd gi|`r`s| dkr awlrjpbgc l`sgfi
|gn` |jh`i dkr |a` nks| awlrjpbgcjbbw r`nk|` }kgi| kd |a`lrjgijf` jr`j |k cki|rgop|` s|krn vj|`r |k |a` kp|b`|
|c gs j ckic`}| " ik| ji koe`c| vg|a }awsgcjb }rk}`r|g`s
S|krn+ rjgidjbb gi|`isg|w l`cr`js`s vg|a gicr`jsgif s|krnlprj|gki !pspjbbw |jh`i js |gn` kd ckic`i|rj|gki" |c'
Projiguj|gki l`cr`js`s |c jil gicr`js`s }`jh lgscajrf`
|c gs ps`l |k s`b`c| |a` rjgidjbb gi|`isg|w gi rj|gkijb n`|akl ps`
|c kd := |k 3== ngip|`s gs jcc`}|job` dkr j}}bgcj|gki gi |a`rj|gkijb n`|akl . dkr |c 2:= ngi) |a` `s|gnj|`l rjgidjbb gi|`isg|w
gs pijcc`}|jobw agfa" jil dkr |c 93== |a` jsspn}|gki kd s|`jlwrjgidjbb gs b`ss tjbgl
\g d | |g !| '
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 54/124
\gn` kd ckic`i|rj|gki !|c'
Djc|krs jdd`c|gif |a` |c
– ]kilgif" sprdjc` rkpfai`ss jil cj|can`i| sbk}` – dkr}kils+bjh`s jil r`s`rtkgrs |c gs |jh`i js u`rk
– Drjc|gki kd gn}`rtgkps jr`j jil drjc|gki kd jr`j lgr`c|bwckii`c|`l |k dbkv
– Dbkv }j|a b`if|a !b`if|a kd |a` }rgicg}jb cajii`b drkn kp|b`| |klgtglgif bgi`'" cajii`b sbk}`" cajii`b saj}` jil dbkv }j||`ri
N`|akls kd `s|gnj|gki kd \c
Hgi`nj|gc vjt` n`|akl
Hgr}gca jil H`row n`|akls jil H`row.Hgr}gca n`|akl
I_CS !Ij|gkijb _`skprc`s Ckis`rtj|gki S`rtgc`' bjf n`|akl
jil I_CS |rjt`b |gn` n`|akl Ok|a I_CS jil H`row.Hgr}gca n`|akls `s|gnj|` |c js |a` spn kd
|rjt`b |gn`s dkr lgscr`|` dbkv r`fgn`s)
S|krnvj|`r gs ckisgl`r`l |k nkt` dgrs| js sa``| dbkv" |a`i jssajbbkv ckic`i|rj|`l dbkv jil dgijbbw js k}`i cajii`b dbkv
|c gs |jh`i js spn kd |rjt`b |gn` kd jbb |a` |ar`` |w}`s kd dbkvs
d d
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 55/124
@s|gnj|gki kd |gn` kd ckic`i|rj|gki
Nkrfjbg jil Bgs`bw n`|akl
Ps`l dkr }bjijr snjbb proji jr`js kd lrjgijf` jr`j 2:=.?= jcr`s
3)=<)=
4)=)7<)=
S g
Bi| c
g gs gi|`isg|w kd rjgidjbb !gica+ar'
i gs Njiigifs sprdjc` rkpfai`ss djc|kr
B gs b`if|a kd dbkv !d|'
S gs sbk}` jil |c gs |gn` kd ckic`i|rj|gki
\gn` kd ckic`i|rj|gki cjbcpbj|gki gitkbt`s g|`rj|gki va`r`girjgidjbb gi|`isg|w gs ko|jgi`l drkn GLD cprt`s
`c l |
o G
o" l jil ` jr` f`kfrj}agcjb sg|` s}`cgdgc }jrjn`|`rs
Tjbp`s kd |a`s` tjrw vg|a |a` r`|pri gi|`rtjb gi w`jrs
G gs s|krn gi|`isg|w jil |c !ngi)' gs |gn` kd ckic`i|rj|gki
Dkr j fgt`i f`kfrj}agcjb bkcj|gki" s|krn gi|`isg|w" lprj|gki jildr`zp`icw jr` r`bj|`l !sakvi ow GLD cprt`s vagca jr` ps`l dkrdgilgif kp| gi|`isg|w dkr j fgt`i lprj|gki rjgi'
S|krn+ rjgidjbb gi|`isg|w l`cr`js`s vg|a gicr`jsgif s|krnlprj|gki !pspjbbw |jh`i js |gn` kd ckic`i|rj|gki" |c'
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 56/124
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 57/124
@s|gnj|gki kd |gn` kd ckic`i|rj|gkiH`row.Aj|a`vjw n`|aklPs`l dkr snjbb vj|`rsa`ls vg|a kt`rbjil dbkv }r`lkngijic`
I gs H`row rkpfai`ss djc|kr !=)=?.=)1'
<46)=
46)=
S
IB
| c
?30)=<46)= S BI H | kbd
H gs pig|s ckit`rsgki ck`ddgcg`i| !:)<< dkr SG pig|s'
B gs kt`rbjil dbkv b`if|a gi n`|`rs !2344'
I gs lgn`isgkib`ss r`|jrljic` ck`ddgcg`i|
S gs sbk}`
\a` H`row n`|akl dkr |c
Ps`dpb dkr snjbb`r vj|`rsa`ls vg|a kt`rbjil dbkv }r`lkngijic`
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 58/124
@s|gnj|gki kd |gn` kd ckic`i|rj|gki
Hgr}gca n`|akl !:7<='Ps`l dkr 2?== jcr`s sgu` ojsgis vg|a cajii`b dbkv }r`lkngij|gki
B gs b`if|a kd |a` njgi cajii`b !d|'
a gs r`bg`d jbkif |a` njgi cajii`b !d|'
310)=3
==61)=
a
B| c
<6)=
3
?
S
iB
| c
|c gs |gn` kd ckic`i|rj|gki !ngi)'
B gs dbkv }j|a b`if|a !d|)'
S gs n`ji sbk}` kd |a` ojsgii gs Njiigif‗s rkpfai`ss ck`ddgcg`i|
!|jh`i js =)=? dkr snkk|a sprdjc` $ =)1 dkr frjss
kt`rbjil'
Aj|a`vjw dkrnpbj
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 59/124
F`i`rjbgu`l |`rrjgi l`scrg}|gki
Lgn`isgkib`ss r`|jrljic`
ck`ddgcg`i| !I'
]jt`n`i| =)=?
Snkk|a" ojr`" }jch`l skgb =):=
]kkr frjss" cpb|gtj|`l rkv crk}s" kr
nkl`rj|`bw rkpfa }jch`l sprdjc`s=)?=
]js|pr`" jt`rjf` frjss =)<=
L`cglpkps dkr`s| =)4=
L`is` frjss" ckigd`rkps dkr`s|" kr
l`cglpkps dkr`s| vg|a l``} bg||`r=)1=
\a` H`row n`|akl dkr |c
@ |g |g d |g d | |g !| '
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 60/124
@s|gnj|gki kd |gn` kd ckic`i|rj|gki !|c'
Hgr}gca n`|akl5 Ps`l dkr cajii`b dbkv ckn}ki`i|
310)=66)= S HB| ca
H5 pig|s ckit`rsgki ck`ddgcg`i| !=)=:70 dkr SG pig|s'
|ca gs gi ngip|`s
B gs cajii`b b`if|a gi n`|`rs
S gs sbk}`
cakbd c | | |
\a` H`row.Hgr}gca n`|akl5 J}}bgcjob` |k vj|`rsa`ls kd =)?0
|k :0= szpjr` ngb` jr`j" njgi cajii`b b`if|as kd : |k 0= ngb`sjil njgi cajii`b sbk}`s kd =)==? |k =)=?
Njgi cajii`b sbk}`5 Cajif` gi `b`tj|gki drkn vj|`rsa`l lgtgl`|k vj|`rsa`l kp|b`| lgtgl`l ow |a` cajii`bs cprtg.b`ig`r b`if|a
Jlakc n`|akl dkr |gn` kd ckic`i|rj|gki
jr`jlrjgijf`| c |c gs gi akprs jil
lrjgijf` jr`j gs gi szpjr` ngb`s
|ca gs gi ngip|`s js }`r Hgr}gca n`|akl
|kbd gs gi gi ngip|`s js }`r H`row n`|akl
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 61/124
I_CS \rjt`b |gn` n`|akl dkr |c
<)=0)=
?
1)=
+
==6)=
sa
sakbd kbd sa
S ]
Bi|
|sa+kbd dkr sa``|+kt`rbjil dbkv !Kt`r|ki jil N`jlkvs" :766'‑ikbd ‗ gs I_CS rkpfai`ss }jrjn`|`r
]? gs ?.w`jr ?< akpr rjgidjbb l`}|a !gica`s'
Bsa gs b`if|a sa``| dbkv gi d``| !23== d||w}gcjbbw 2:== d|''
Ssa gs sa``| dbkv sbk}`
casckbd sac | | | | +
:) Sa``| dbkv !kt`rbjil dbkv' – |sa+kbd
?) Sajbbkv ckic`i|rj|̀ l dbkv . |sc
3) Cajii`b dbkv |rjt`b |gn` . |ca
|c gs ckisgl`r`l |k gicbpl` 3 ckn}ki`i|s
Njiigif‗s rkpfai`ss ck`ddgcg`i| gs gidbp`ic`l ow j' _jgilrk}o' a b d ' o b !b
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 62/124
gn}jc|" o' Lrjf kt`r |a` }bji sprdjc`" c' Kos|jcb`s !bg||`r" t`f`|j|gki"crk} rglf`s" rkchs" `|c)' vg|agi 3 cn jil l' @rksgki jil|rjis}kr|j|gki kd s`lgn`i|
Jsspn}|gkis njl` a`r` gicbpl` j' Sajbbkv" s|`jlw" pigdkrn dbkv8o' ?< ar) rjgidjbb jil ckis|ji| gi|`isg|w kd `dd`c|gt`+i`| rjgidjbb8 c'Ngikr `dd`c| kd gidgb|rj|gki ki |rjt`b |gn`
Sprdjc` l`scrg}|gki ikb
Snkk|a sprdjc`s !ckicr`|`" js}ajb|" frjt`b" kr ojr` skgb' =)=::
Djbbkv !ik r`sglp`' =)=0
Cpb|gtj|`l skgbs5 _`sglp` % =)=4
_`sglp` ckt`r 9 ?=% =):6
Frjss5 Sakr| frjss }rjgrg` =):0
L`is` frjss`s =)?<O`rnplj =)<:
_jif` !ij|prjb'5 =):3
Vkkls5 Bgfa| pil`rorpsa =)<=
L`is` pil`rorpsa =)1=
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 63/124
Cajii`b dbkv |rjt`b |gn` !|ca'5 `s|gnj|gki gs sgngbjr |k |sc
ca
ca
ca
cacaca
T
B|
S _i
T
4=
<7):?
:3
? _ gs awlrjpbgc rjlgps
Tca gs gi d``| }`r s`c)
Bca gs b`if|a kd |a` cajii`b gi d``|
|ca
gs gi ngip|`s
|sc dkr sajbbkv ckic`i|rj|`l dbkv5 Dbkv t`bkcg|w !Tsc' gs`s|gnj|`l ow Njiigifs `zpj|gki jil ps`l gi |a` |sc `s|gnj|gki
sc
sc
sc
scscsc
T
B|
S _i
T
4=
<7):?
:3
?
‑_‗ jil ‑i‗ jr` |jh`i js
=)< d``| jil =)=0 dkr pi}jt`l sprdjc`s
=)? d``| jil =)=?0 dkr }jt`l sprdjc`s
T gs gi d``| }`r s`c)B gs sajbbkv ckic`i|rj|`l dbkv b`if|a gi d``|
|sc gs gi ngip|`s
Ssc gs sbk}`
I_CS \rjt`b |gn` n`|akl dkr |c
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 64/124
Njiigif‗s _kpfai`ss Ck`ddgcg`i|s dkr K}`i Cajii`bs
\ d a b N g ‗
?) Dbkkl}bjgis
] o a a = =?0 = =30
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 65/124
\w}` kd cajii`b Njiigif‗s i
J) Ij|prjb s|r`jns
:) Ngikr s|r`jns !|k} vgl|a j| dbkkl s|jf` 2 :== d|'
j) Cb`ji" s|rjgfa|" dpbb" ik rgd|s kr l``}
}kkbs
=)=?0.=)=33
o) Sjn` js j" op| nkr` s|ki`s jil
v``ls=)=3=.=)=<=
c) Cb`ji" vgilgif" skn` }kkbs jil
sakjbs=)=33.=)=<0
l) Sjn` js c" op| skn` v``ls jil
s|ki`s
=)=30.=)=0=
`) Sjn` js l" bkv`r s|jf`s" nkr`
gi`dd`c|gt`=)=<=.=)=00
d) Sjn` js l" nkr` s|ki`s =)=<0.=)=4=
f) Sbpffgsa r`jca`s" v``lw" l``} }kkbs =)=0=.=)=1=
a) T`rw v``lw" a`jtw s|jil kd |gno`r
jil pil`rorpsa=)=60.=):0=
g) Nkpi|jgi s|r`jns vg|a frjt`b jil
ckoob`s" d`v okpbl`rs ki ok||kn=)=3=.=)=0=
e) Nkpi|jgi s|r`jns vg|a ckoob`s jil
bjrf` okpbl`rs ki ok||kn=)=<=.=)=6=
j) ]js|pr`" ik orpsa" sakr| frjss =)=?0.=)=30
o) ]js|pr`" ik orpsa" agfa frjss =)=3=.=)=0=
c) Cpb|gtj|`l jr`js" ik crk} =)=?=.=)=<=
l) Cpb|gtj|`l jr`js" nj|pr` rkv crk}s =)=?0.=)=<0
`) Cpb|gtj|`l jr`js" nj|pr` dg`bl crk}s =)=3=.=)=0=
d) Scj||`r`l orpsa" a`jtw v``ls =)=30.=)=6=
f) Bgfa| orpsa jil |r``s gi vgi|`r =)=30.=)=4=
a) Bgfa| orpsa jil |r``s gi spnn`r =)=<=.=)=1=
g) N`lgpn |k l`is` orpsa gi vgi|`r =)=<0.=)::=
) N`lgpn |k l`is` orpsa gi spnn`r =)=6=.=):4= h) \r``s" l`is` vgbbkvs spnn`r"
s|rjgfa|=)::=.=)?==
b) \r``s" cb`jr`l bjil vg|a |r`` s|pn}s"
ik s}rkp|s=)=3=.=)=0=
n) \r``s" cb`jr`l bjil vg|a |r``
s|pn}s" vg|a s}rkp|s =)=0=.=)=1=
i) \r``s" a`jtw s|jil kd |gno`r" d`v
lkvi |r``s" dbkkl s|jf` o`bkv orjica`s=)=1=.=):?=
k) \r``s" a`jtw s|jil kd |gno`r" d`v
lkvi |r``s" dbkkl s|jf` r`jcagif
orjica`s
=):==.=):4=
3) Lrjfbgi`.`qcjtj|`l kr lr`lf`l
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 66/124
j) Ik t`f`|j|gki =)=?0.=)=33
o) Bgfa| orpsa ki ojihs =)=30.=)=4=
<) _kch cp|s
j) Snkk|a jil pigdkrn =)=?0.=)=<=
o) Ejff`l jil grr`fpbjr =)=30.=)=0= 0) Pinjgi|jgi`l cajii`bs
j) L`is` v``ls" agfa js dbkv l`}|a =)=0=.=):?=
o) Cb`ji ok||kn" orpsa ki sgl`s =)=<=.=)=1=
c) Cb`ji ok||kn" orpsa ki sgl`s"
agfa`s| s|jf`=)=<0.=)::=
l) L`is` orpsa" agfa s|jf` =)=1=.=):<= C) Bgi`l cajii`bs
:) Js}ajb| =)=:3.=)=:4
?) Orgch !gi c`n`i| nkr|jr' =)=:?.=)=:1
3) Ckicr`|`
j) \rkv`b dgigsa =)=::.=)=:0
o) Dbkj| dgigsa =)=:3.=)=:4 c) Pidgigsa`l =)=:<.=)=?=
l) Fpig|`" r`fpbjr =)=:4.=)=?3
`) Fpig|`" vjtw =)=:1.=)=?0
<) _g}rj} !i l`}`ils ki rkch sgu`' =)=?=.=)=30
0) T`f`|jb bgigif =)=3=.=)0==
3) Njekr s|r`jns !|k} vgl|a j| dbkkl s|jf` 9 :== d|'
j) _`fpbjr s`c|gki vg|a ik okpbl`rs kr
orpsa=)=?0.=)=4=
o) Grr`fpbjr rkpfa s`c|gki =)=30.=):==
O) @qcjtj|`l kr lr`lf`l cajii`bs:) @jr|a" s|rjgfa| jil pigdkrn
j) Cb`ji" r`c`i|bw ckn}b`|`l =)=:4.=)=?=
o) Cb`ji" jd|`r v`j|a`rgif =)=:1.=)=?0
c) Frjt`b" pigdkrn s`c|gki" cb`ji =)=??.=)=3=
l) Vg|a sakr| frjss" d`v v``ls =)=??.=)=33
?) @jr|a" vgilgif jil sbpffgsaj) Ik t`f`|j|gki =)=?3.=)=3=
o) Frjss" skn` v``ls =)=?0.=)=33
c) L``} v``ls kr jzpj|gc }bji|s gi
l``} cajii`bs=)=3=.=)=<=
l) @jr|a ok||kn jil rpoob` sgl`s =)=?1.=)=30
`) S|kiw ok||kn jil v``lw ojihs =)=?0.=)=<= d) Ckoob` ok||kn jil cb`ji sgl`s =)=3=.=)=0=
f) Vgilgif" sbpffgsa" s|kiw ok||kn"
v``lw ojihs=)=?0.=)=<=
a) L`is` v``ls js agfa js dbkv l`}|a =)=0=.=):?=
Njiigif‗s Ck`ddgcg`i|s dkr S|r``|s jil Fp||`rs
\w}` kd fp||`r kr }jt`n`i| Nji i
Njiigif‗s _kpfai`ss Ck`ddgcg`i|s dkr Cbks`l Ckilpg|s!JSC@ :71? DAVJ ?==:'
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 67/124
\w}` kd fp||`r kr }jt`n`i| Nji) i
Ckicr`|` fp||`r" |rkv`b`l dgigsa =)=:?
Js}ajb| }jt`n`i|5 snkk|a |`q|pr` =)=:3
Js}ajb| }jt`n`i|5 rkpfa |`q|pr` =)=:4
Ckicr`|` fp||`r vg|a js}ajb|}jt`n`i|5 snkk|a |`q|pr`
=)=:3
Ckicr`|` fp||`r vg|a js}ajb|}jt`n`i|5 rkpfa |`q|pr`
=)=:0
Ckicr`|` }jt`n`i|5 dbkj| dgigsa =)=:<
Ckicr`|` }jt`n`i|5 orkkn dgigsa =)=:4
Dkr fp||`rs vg|a snjbb sbk}` kr va`r` s`lgn`i|njw jccpnpbj|`" gicr`js` i tjbp`s ow =)=?!PSLK\" DAVJ ?==:')
!JSC@ :71?" DAVJ ?==:'
Ckrrpfj|`l.n`|jb }g}` .. !?.:+? gi) q :+? gi)ckrrpfj|gkis'
]bjgi =)=??.=)=?4
]jt`l git`r| =)=:1.=)=??
S}pi js}ajb| bgi`l =)=::.=)=:0 ]bjs|gc }g}` !snkk|a' =)=::.=)=:0
Ckrrpfj|`l.n`|jb }g}` !?.?+3 gi) ow :+? gi)jiipbjr'
=)=??.=)=?6
Ckrrpfj|`l.n`|jb }g}` !?.?+3 gi) ow :+? gi)a`bgcjb'
=)=::.=)=?3
Ckrrpfj|`l.n`|jb }g}` !4 gi) ow : gi) a`bgcjb' =)=??.=)=?0
Ckrrpfj|`l.n`|jb }g}` !0 gi) ow : gi) a`bgcjb' =)=?0 – =)=?4 Ckrrpfj|`l.n`|jb }g}` !3 gi) ow : gi) a`bgcjb' =)=?6 – =)=?1
Ckrrpfj|`l.n`|jb }g}` !4 gi) ow ? gi) s|rpc|prjb}bj|`'
=)=33 – =)=30
Ckrrpfj|`l.n`|jb }g}` !7 gi) ow ?.:+? gi)s|rpc|prjb }bj|`'
=)=33 – =)=36
Ckrrpfj|`l }kbw`|awb`i` =)=:= – =)=:3
Snkk|a =)==7.=)=:0 Ckrrpfj|`l =)=:1 – =)=?0
S}grjb rgo n`|jb }g}` !snkk|a' =)=:?.=)=:3
Tg|rgdg`l cbjw ]g}`s =)=::.=)=:0
Tg|rgdg`l cbjw Bgi`r }bj|`s =)=:3.=)=:6
]kbwtgiwb cabkrgl` !]TC' !snkk|a' =)==7.=)=::
ik|`5 Njiigif i dkr ckrrpfj|`l }g}`s gs dpic|gki kd ckrrpfj|gkisgu`" }g}` sgu`" jil va`|a`r ckrrpfj|gkis jr` jiipbjr kr a`bgcjb
Nj|`rgjb Njiigif‗s i
Jso`s|ks.c`n`i| }g}` =)=::.=)=:0
Orgch =)=:3.=)=:6 Cjs| grki }g}`
C`n`i|.bgi`l $ s`jb ckj|`l =)=::.=)=:0
Ckicr`|` !nkikbg|agc'
Snkk|a dkrns =)=:?.=)=:<
_kpfa dkrns =)=:0.=)=:6
Ckicr`|` }g}` =)=::.=)=:0
Okq !snkk|a' =)=:?.=)=:0
Ps` kd Njiigif `zpj|gki dkr dbkv t`bkcg|w i``ls cajii`b
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 68/124
H Bjil Ps` + Dbkv _`fgn`
=)?0 Dkr`s| vg|a a`jtw frkpil bg||`r" ajw n`jlkv !kt`rbjil dbkv'
=)0 \rjsa djbbkv kr ngignpn |gbbjf` cpb|gtj|gki8 cki|kpr kr s|rg}crk}}`l8 vkklbjil !kt`rbjil dbkv'
=)6 Sakr| frjss }js|pr` !kt`rbjil dbkv'
=)7 Cpb|gtj|`l s|rjgfa| rkv !kt`rbjil dbkv'
:)= I`jrbw ojr` jil pi|gbb`l !kt`rbjil dbkv'8 jbbptgjb djis giv`s|`ri nkpi|jgi r`fgkis
:)0 Frjss`l vj|`rvjw
?)= ]jt`l jr`j !sa``| dbkv'8 snjbb p}bjil fpbbg`s
Ck`ddgcg`i|s kd t`bkcg|w !d}s' t`rsps sbk}` !%' r`bj|gkisag}!NcCp`i :7178 SCS :76?'
f z w}jrjn`|`rs vagca jr` pspjbbw ik| jtjgbjob`
Jijb|`rij|gt` dkr spca sg|pj|gkis gs T> H S:+?
H gs j ck`ddgcg`i| ojs`l ki dbkv |w}` jil g|s tjbp`s dkr s`t`rjb
dbkv sg|pj|gkis jr` fgt`i ow NcCp`i !:717' jil SCS !:76?'
Ck`ddgcg`i|s kd t`bkcg|w !d}s' t`rsps sbk}` !%' r`bj|gkisag}
!Skrr`bb jil Ajngb|ki :77:'
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 69/124
Dbkv \w}` H
Snjbb \rgop|jrw . ]`rnji`i| kr gi|`rng||`i| s|r`jns vagca j}}`jr
js skbgl kr ljsa`l obp` bgi`s ki PSFS |k}kfrj}agc nj}s)
?):
Vj|`rvjw . Jiw kt`rbjil dbkv rkp|` vagca gs j v`bb l`dgi`l svjb`ow `b`tj|gki cki|kprs" op| gs ik| j s|r`jn s`c|gki js l`dgi`l jokt`)
:)?
Sa``| Dbkv . Jiw k|a`r kt`rbjil dbkv }j|a vagca lk`s ik|ckidkrn |k |a` l`dgig|gki kd j vj|`rvjw)
=)<1
!Skrr`bb jil Ajngb|ki :77:'
I_CS b a l d \
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 70/124
I_CS bjf n`|akl dkr \c
\c gs `s|gnj|`l ow |a` dkbbkvgif `zpj|gki
Bjf |gn` !|b'5 \gn` o`|v``i |a` c`i|`r kd njss kd |a` rjgidjbb`t`i| !aw`|kfrj}a' jil |aj| kd lgr`c| rpikdd !awlrkfrj}a'‑|b‑ gs v`gfa|`l |gn` kd ckic`i|rj|gki dkr `jca s`fn`i| kd |a`
lrjgijf` jr`j
L`}`ils ki jr`j" b`if|a jil sbk}` bgh` }awsgcjb }rk}`r|g`s kd |a`vj|`rsa`l
_prjb jil spoproji jr`js ajt` |a` }k|`i|gjb |k r`|jgi rjgidjbb ki|a` lrjgijf` jr`j jil |ags }k|`i|gjb gicr`js`s vg|a |a` gicr`js`kd |a` |gn` kd |rjt`b
:=:===
:7==
:
4)=
0)=
6)=1)=
CI S
W
S B\
\
\
b
b
c\b gs |a` ojsgi+vj|`rsa`l bjf |gn` gs akprs
B gs awlrjpbgc b`if|a kd |a` vj|`rsa`l !d``|'
CI gs I_CS cprt` ipno`r
W gs jt`rjf` vj|`rsa`l sbk}` !%'
I_CS bjf n`|akl dkr \
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 71/124
I_CS bjf n`|akl dkr \c Awlrjpbgc B`if|a kd |a` Vj|`rsa`l !B'5 B`if|a drkn |a` }kgi| kd l`sgfi jbkif |a` njgi cajii`b |k |a` rglf`
bgi` j| |a` p}}`r `il kd |a` vj|`rsa`l Va`i |a` njgi cajii`b gs dkrn`l drkn |a` cknogigif kd |vk
cajii`bs" |a` lrjgi |aj| ajs fr`j|`r |rgop|jrw lrjgijf` jr`j gs |jh`ijs |a` njgi lrjgi
Jt`rjf` Vj|`rsa`l Sbk}` !W'5
N`|akls dkr `s|gnj|gif |a` jt`rjf` vj|`rsa`l sbk}` Lgtgl` |a` vj|`rsa`l gi|k lgdd`r`i| sbk}` jr`js jil dgil |a`r` jr`j
drjc|gkis – S`b`c| r`}r`s`i|j|gt` bkcj|gki dkr `jca kd |a` sbk}` jr`js jil dgil
sbk}` gi }`rc`i|
– Npb|g}bw sbk}` vg|a |a` drjc|gkijb jr`j dkr `jca kd |a` sbk}` jr`js jilspn |a` r`spb|ji| |k ko|jgi v`gfa|`l jt`rjf` vj|`rsa`l sbk}`
Lgtgl` |a` vj|`rsa`l gi|k szpjr` frgls jil j| |a` gi|`rs`c|gkis kd |a` frgls n`jspr` |a` sbk}` }`r}`ilgcpbjr |k |a` cki|kprs – \jh` n`ji sbk}` kd jbb |a` gi|`rs`c|gkis js |a` v`gfa|`l jt`rjf`
vj|`rsa`l sbk}`
I_CS bjf n`|akl dkr \c
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 72/124
CS jf `| kl k c
Cprt` ipno`r n`|akl dkr dgil ojsgi+vj|`rsa`l bjf |gn` !ars' Iknkfrj}as r`bj|gif awlrjpbgc b`if|a kd |a` vj|`rsa`l !B' vg|a |a`
vj|`rsa`l+ojsgi bjf |gn` !|b' |arkpfa I_CS cprt` ipno`r jilv`gfa|`l jt`rjf` vj|`rsa`l sbk}` cji o` ps`l
Lrjv j t`r|gcjb drkn |a` awlrjpbgc b`if|a kd |a` vj|`rsa`l |k |a`v`gfa|`l jt`rjf` vj|`rsa`l sbk}` cprt` – Lrjv akrguki|jb drkn |a` }kgi| kd gi|`rs`c|gki |k |a` I_CS Cprt`
Ipno`r
– Lrjv t`r|gcjb drkn |a` }kgi| kd gi|`rs`c|gki ki |a` I_CS cprt` |k |a`vj|`rsa`l bjf |gn` jqgs dkr r`jlgif |a` vj|`rsa`l+ojsgi bjf |gn`
Ojsgi bjf r`zpgr`s ckrr`c|gki ow j djc|kr ko|jgi`l drkn jiknkfrj}a gd |a` njgi cajii`b gs gn}rkt`l – \a` ckrr`c|gki djc|kr gs r`jl dkr |a` % b`if|a kd |a` cajii`b nklgdg`l
|arkpfa I_CS Cprt` Ipno`r bgi`
– Ojsgi bjf l`cr`js`s vg|a |a` cajii`b nklgdgcj|gki
Ojsgi bjf r`zpgr`s ckrr`c|gki ow j djc|kr ko|jgi`l drkn jiknkfrj}a gd gn}`rtgkps jr`js kccpr gi |a` vj|`rsa`l – \a` ckrr`c|gki djc|kr gs r`jl dkr |a` % gn}`rtgkps jr`j kd |a`
vj|`rsa`l |arkpfa |a` I_CS Cprt` Ipno`r bgi`
–Ojsgi bjf l`cr`js`s vg|a |a` gn}`rtgkps jr`js gi |a` vj|`rsa`l
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 73/124
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 74/124
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 75/124
_j|gkijb n`|akl dkr }`jh rpikdd rj|`
J G C Z
J G C Z
U
J G C Z
?61)=
Z gs }`jh lgscajrf` drkn |a` ojsgi !n3+s`c)'
C gs ck`ddgcg`i| kd rpi kdd
G gs gi|`isg|w kd rjgidjbb dkr j s|krn kd fgt`i dr`zp`icw jillprj|gki `zpjb |k |c !nn+akpr'
J gs jr`j kd |a` ojsgi !hn?'
U gs ckit`rsgki djc|kr vg|a tjbp` : dkr J gi jcr`s" G gi gica`s+ar)jil Z gi cpogc d``| }`r s`ckil
]`jh lgscajrf` drkn |a` lrjgijf` ojsgi kr cj|can`i| gs
`s|gnj|`l ow
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 76/124
_jgidjbb gi|`isg|w !G'5
Gi|`isg|w kd rjgidjbb gs ko|jgi`l drkn |a` bkif |`rn rjgidjbb
lj|j jijbwsgs\a` gi|`isg|w ckrr`s}kilgif |k |a` |gn` kd ckic`i|rj|gki dkr
j fgt`i r`|pri }`rgkl gs ckisgl`r`l
Nklgdg`l rj|gkijb n`|akl ps`s tkbpn` kr l`}|a kd rjgidjbbgi }bjc` kd gi|`isg|w kd rjgidjbb
Fkkl dkr snjbb dr`zp`i| s|krnsDkpil drkn |a` dkbbkvgif gi}p|s
Jiipjb `qc`l`ic` }rkojogbg|w !J@]' kr r`|pri }`rgkl
\gn` kd ckic`i|rj|gki dkr |a` lrjgijf` ojsgi gi zp`s|gki
L`}|a – Lprj|gki – Dr`zp`icw !LLD' cprt`s+|job`s krGi|`isg|w – Lprj|gki – Dr`zp`icw !GLD' cprt`s+|job`s
Dkr gi|`isg|w" l`}|a kd rjgidjbb gs lgtgl`l ow |gn` kd ckic`i|rj|gki
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 77/124
GLD cprt`s
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 78/124
GLD cprt`sJijbwsgs kd njss cprt` kd j rjgidjbb jil l`t`bk}n`i| kd
njqgnpn gi|`isg|w.lprj|gki r`bj|gkisag}
S`b`c| j ckit`ig`i| |gn` s|`} !Μ|' jil lgtgl` |a` s|krn gi|kI |gn` s|`}s !L>I) Μ|'
Drkn |a` njss cprt` dkr `jca kd |a` |gn` s|`} r`ckrl l`}|akd rjgidjbb jil gi|`isg|w kd rjgidjbb
Gl`i|gdw |a` njqgnpn rjgidjbb l`}|a+gi|`isg|w
_`}`j| |a` `q`rcgs` dkr lgdd`r`i| |gn` s|`}s !sjw dkr 0 ngi":= ngi" :0 ngi" 3= ngi" <0 ngi" 4= ngi" jil sk ki' jilgl`i|gdw |a` njqgnpn rjgidjbb l`}|a+gi|`isg|w
]bk| j frj}a o`|v``i njqgpn rjgidjbb l`}|a+gi|`isg|w jil
|gn` s|`}s !lprj|gki kd rjgidjbb' |k ko|jgi NLL+NGL cprt` Dg| |a` gi|`isg|w.lprj|gki lj|j ow jiw kd |a` dkbbkvgif |vk
`q}r`ssgkis jil dgil ‑j" o jil c‗ kr ‑j jil i‗ }jrjn`|`rs
inon|
j G kr
j|
c G
GLD cprt`s
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 79/124
Jijbwsgs kd njss cprt` kd j rjgidjbb jil l`t`bk}n`i| kd njqgnpn gi|`isg|w.lprj|gki.dr`zp`icw r`bj|gkisag}
_jgidjbb lj|j drkn j s`bd.r`ckrlgif rjgifjpf` jtjgbjob` dkr j bkif}`rgkl gs ps`lDkr `jca kd |a` I w`jrs N ipno`r kd sgfigdgcji| jil a`jtw rjgidjbb
`t`i|s jr` s`b`c|`l dkr jijbwsgs
\a` rjgidjbb `t`i|s kd `jca kd |a` w`jr jr` jijbwu`l |k ko|jginjqgnpn gi|`isg|w.lprj|gki r`bj|gkisag}
\ags gs r`}`j|`l dkr jbb |a` I w`jrs |k ko|jgi |gn` s`rg`s kd gi|`isg|w.lprj|gki r`bj|gkisag}s
Psgif |a` r`spb|s dgil r`|pri }`rgkl !ps` V`gopbb dkrnpbj*'
]bk| njqgnpn gi|`isg|w ts r`|pri }`rgkl vg|a lprj|gki js |a` 3rl }jrjn`|`r kr }bk| njqgnpn gi|`isg|w ts lprj|gki vg|a r`|pri
}`rgkl js |a` 3rl
}jrjn`|`r |k ko|jgi GLD cprt`sJb|`rij|gt`bw ̀ q}r`ss |a` gi|`isg|w.lprj|gki.dr`zp`icw
r`bj|gkisag} ow |a` dkbbkvgif `zpj|gki
i
q
j L
H\ G
H" q" j jil i jr` |a` ck`ddgcg`i|s s}`cgdgc |k |a` jr`j
\ gs r`|pri }`rgkl !w`jrs'" L gs lprj|gki !akprs'
G gs gi|`isg|w njqgnpn gi|`isg|w !n+ar'
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 80/124
w`jr
Lprj|gki
: ? ))) g ))) N
:
?
)))
E
)))
I
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 81/124
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 82/124
_pikdd ck`ddgcg`i| ‑C‗
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 83/124
]
_C _ gs |k|jb l`}|a kd rpikdd
] gs |k|jb l`}|a kd }r`cg}g|j|gki
\w}gcjb rpikdd ck`ddgcg`i|s dkr proji vj|`rsa`ls jr` jtjgbjob`drkn }pobgsa`l bg|`rj|pr`
Gi cjs` kd |a` rprjb jil ngq`l ps` vj|`rsa`ls |a` kt`rjbb rpikdd ck`ddgcg`i| gs ko|jgi`l ow
Gl`i|gdw |a` dkpr js}`c|s" vj|`rsa`l r`bg`d" skgb gidgb|rj|gki"t`f`|j|gki ckt`r jil sprdjc` |w}`s" jil |a`gr gn}kr|jic`
Sws|`nj|gc jssgfin`i| kd rpikdd ck`ddgcg`i| dkr `jca kd |a`js}`c|s !Lj|j gs jtjgbjob` dkr jssgs|gif |a` jssgfin`i|'
Ko|jgi kt`rjbb rpikdd ck`ddgcg`i| ow
stgr C C C C C
C gs kt`rjbb rpikdd ck`ddgcg`i|Cr gs |a` ck`ddgcg`i| jcckpi|gif |a` r`bg`d
Cg gs |a` ck`ddgcg`i| jcckpi|gif dkr skgb gidgb|rj|gki
Ct gs |a` ck`ddgcg`i| jcckpi|gif dkr t`f`|j|gki
Cs gs |a` ck`ddgc`i| jcckpi|gif dkr sprdjc` |w}`s
Pign}rkt`l jr`js5_pikdd ck`ddgcg`i|s dkr
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 84/124
\w}` kd lrjgijf` jr`j _pikdd ck`ddgcg`i|
Opsgi`ss5
Lkvi|kvi jr`js =)6=.=)70
I`gfaokrakkl jr`js =)3=.=)6=
_`sgl`i|gjb5Sgifb`.djngbw jr`js =)3=.=)0=
Npb|g.pig|s" l`|jca`l =)<=.=)4=
Npb|g.pig|s" j||jca`l =)4=.=)60
Spoproji =)30.=)<=
J}jr|n`i| lv`bbgif jr`js =)3=.=)6=
Gilps|rgjb5
Bgfa| jr`js =)3=.=)1=
A`jtw jr`js =)4=.=)7=
]jrhs" c`n`|`rg̀ s =):=.=)?0
]bjwfrkpils =)3=.=)<=
_jgbrkjl wjrls =)3=.=)<=
Sjil kr sjilw bkjn skgb" =.3% =):0.=)?=
Sjil kr sjilw bkjn skgb" 3.0% =)?=.=)?0
Objch kr bk`ssgjb skgb" =.3% =):1.=)?0
Objch kr bk`ssgjb skgb" 3.0% =)?0.=)3=Objch kr bk`ssgjb skgb" 9 0% =)6=.=)1=
L``} sjil jr`j =)=0.=):0
S|``} frjss`l sbk}`s =)6=
Bjvis5
Sjilw skgb" dbj| ?% =)=0.=):=Sjilw skgb" jt`rjf` ?.6% =):=.=):0
Sjilw skgb" s|``} 6% =):0.=)?=
A`jtw skgb" dbj| ?% =):3.=):6
A`jtw skgb" jt`rjf` ?.6% =):1.=)??
A`jtw skgb" s|``} 6% =)?0.=)30
S|r``|s5
Js}ajb|gc =)10.=)70
Ckicr`|` =)7=.=)70
Orgch =)6=.=)10
Lrgt`s jil vjbhs =)60.=)70
_kkds =)60.=)70
proji vj|`rsa`ls
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 85/124
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 86/124
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 87/124
S|`}s gi l`t`bk}gif jil j}}bwgif
|a` rj|gkijb n`|akl
Ps` kd rj|gkijb n`|akl5
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 88/124
Jsspn}|gkis jil bgng|j|gkis
\a` n`|akl gs j}}bgcjob` gd |c dkr |a` lrjgijf` jr`j gs b`ss |aji |a`lprj|gki kd }`jh rjgidjbb gi|`isg|w
\a` cjbcpbj|`l rpikdd gs lgr`c|bw }rk}kr|gkijb |k |a` rjgidjbb gi|`isg|w
_jgidjbb gi|`isg|w gs pigdkrn |arkpfakp| |a` lprj|gki kd |a` s|krn
_jgidjbb gs lgs|rgop|`l pigdkrnbw kt`r |a` lrjgijf` jr`j
\a` dr`zp`icw kd kccprr`ic` dkr |a` }`jh lgscajrf` gs |a` sjn` js |a`
dr`zp`icw kd |a` rjgidjbb }rklpcgif |aj| `t`i| \a` ngignpn lprj|gki |k o` ps`l dkr ckn}p|j|gki kd rjgidjbb gi|`isg|w gs
:= ngip|`s !Gd |c gs 2:= ngi)" |a`i := ngip|`s gs jlk}|`l dkr rjgidjbbgi|`isg|w ckn}p|j|gkis'
\a` rj|gkijb n`|akl lk`s ik| jcckpi| dkr s|krjf` gi |a` lrjgijf` jr`j)Jtjgbjob` s|krjf` gs jsspn`l |k o` dgbb`l
Lp` |k |a` jokt` jsspn}|gkis jil bgng|j|gkis ps` kd |a` rj|gkijb n`|akl gsbgng|`l |k vj|`rsa`ls kd 2?== jcr`s sgu`
\a` rj|gkijb n`|akl r`}r`s`i|s j s|`jlw gidbkv.kp|dbkv ckilg|gki kd |a`vj|`rsa`l lprgif |a` }`jh gi|`isg|w kd |a` l`sgfi s|krn
Jiw s|krjf` d`j|pr`s !l`|`i|gki }kils" cajii`bs jil dbkkl}bjgi s|krjf`'ajtgif sgfigdgcji| tkbpn` cjiik| o` }rk}`rbw r`}r`s`i|`l vg|a |a`
rj|gkijb n`|akl
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 89/124
I_CS \_.00 N`|akl
Eps| js |a` rj|gkijb n`|akl |a` I_CS awlrkbkfgcn`|akl jbsk r`zpgr`s lrjgijf` ojsgi jr`j" rpikdd djc|kr" |gn` kd ckic`i|rj|gki jil rjgidjbb gi}p|s
G| |jh`s gi|k ckisgl`rj|gki |a` dkbbkvgif –
|gn` lgs|rgop|gki kd rjgidjbb – Gig|gjb rjgidjbb bkss`s |k gi|`rc`}|gki jil l`}r`ssgki s|krjf`
– Gidgb|rj|gki rj|` l`cr`jsgif lprgif |a` ckprs` kd |a` s|krn
g| gs ps`l |k `s|gnj|` s|krn vj|`r rpikdd }`jh rj|`sjil |k f`i`rj|` awlrkfrj}as dkr |a` rkp|gif kd s|krn
vj|`r dbkvs \a` n`|akl cji o` dkr lrjgijf` jr`js p}|k ?=== jcr`s
sgu`
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 90/124
I_CS \_.00 N`|akl
J}}bgcj|gki kd |a` I_CS n`|akl gitkbt`s – L`|`rngigif cprt` ipno`rs
– Dgilgif |gn` kd ckic`i|rj|gki
– L`|`rngij|gki kd |k|jb jil `qc`ss rjgidjbb jnkpi|s
–
L`t`bk}n`i| lgr`c| rpikdd awlrkfrj}as |arkpfa psgif pig|awlrkfrj}a j}}rkjca
Lgtgl` |a` bjrf`r lrjgijf` ojsgis gi|k dgig|` ipno`r kd spojr`js l`t`bk} awlrkfrj}as !`b`n`i|jb awlrkfrj}as' dkr `jcakd |a`n" rkp|` |a` dbkvs |k |a` ojsgi kp|b`|" jil ko|jgi |a`
awlrkfrj}a |arkpfa spnngif |a` `b`n`i|jb awlrkfrj}as – Gi|rklpc` nklgdgcj|gkis dkr `dd`c|s kd |rjisg| |gn` |arkpfa |a`
ojsgi jil dkr |a` s|krjf` gi |a` s|r`jn cajii`bs
Awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 91/124
Awlrkfrj}a Frj}a sakvgif s|krn vj|`r dbkvs jfjgis| |gn` dkr j s|r`jn
!j| |a` kp|b`| kd j vj|`rsa`l'
S|r`jn cjrrg`s `qc`ss !i`|' rjgidjbb !s|krn vj|`r ngips bkss`s'jil gicbpl`s
– Kt`rbjil sprdjc` rpikdd – lgdd`r`ic` kd rjgidjbb jil lgdd`r`i|bkss`s !gi|`rc`}|gki" gidgb|rj|gki jil sprdjc` s|krjf`s'
– Gi|`rdbkv !sposprdjc` rpikdd' – lgdd`r`ic` kd sposkgb gidgb|rj|gki
jil |k} skgb gidgb|rj|gki – Ojs` dbkv !frkpilvj|`r dbkv' –frkpilvj|`r r`cajrfgif rgs`s
frkpilvj|`r |job` jil `iajic`s |a` ojs` dbkv
Kt`rbjil sprdjc` rpikdd }bps gi|`rdbkv |kf`|a`r gs hikvi jslgr`c| rpikdd . @dd`c|gt` !i`|' rjgidjbb cki|rgop|`s |k |ags
J s|r`jn awlrkfrj}a gs t`rw ckn}b`q jil ajs njiw hgihs jil}`jhs – gilgtglpjb rjgidjbb `t`i|s jr` `q}r`ss`l js }`jhs – `jca kd |a` }`jhs gs j s|krn awlrkfrj}a
\a`kr`|gcjbbw g| gs }kssgob` |k r`skbt` j ckn}b`q awlrkfrj}a gi|knjiw sgn}b` awlrkfrj}as
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 92/124
_jgidjbb jil rpikdd awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 93/124
S|krn awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 94/124
Awlrkfrj}a gs |a` r`s}kis` kd |a` cj|can`i| |k |a` rjgidjbb`t`i| kr s|krn
– Lprgif rjgidjbb s|krjf` opgbls p} gi |a` vj|`rsa`l jil kic`ssj|gki kd rjgidjbb |a` s|krjf` frjlpjbbw l`}b`|`s
– \a` `qc`ss+i`| rjgidjbb r`jca`s |a` kp|b`| vg|a j |gn` bjf
S|krn awlrkfrj}as jr` vj|`rsa`l jil rjgidjbb `t`i| s}`cgdgc – tjrw vg|a vj|`rsa`l cajrjc|`rgs|gcs jil rjgidjbb cajrjc|`rgs|gcs
–
Saj}`" sgu`" sbk}`" lrjgijf` l`isg|w . Kccprr`ic` kd }`jh jilsaj}` kd awlrkfrj}a jr` jdd`c|`l njgibw ow cj|can`i| saj}` – dkr snjbb`r cj|can`i|s !va`r` kt`r bjil dbkv gs }r`lkngiji|'cj|can`i| sbk}` gs gn}kr|ji|
– Skgb |w}`" f`kbkfgcjb ckilg|gkis" bjil ps` jil bjil ckt`r!gn}kr|ji| dkr snjbb s|krns'
– Bjh`s" svjn}s jil k|a`r sprdjc` vj|`r s|krjf`s
– Cajii`b cajrjc|`rgs|gcs !crkss s`c|gki" rkpfai`ss" s|krjf`cj}jcg|w' – dkr bjrf`r cj|can`i|s !va`r` cajii`b dbkv gs}r`lkngiji|' |a` }rgicg}jb cajii`b sbk}` gs gn}kr|ji|
–
gi|`isg|w" lprj|gki jil lgr`c|gki kd nkt`n`i| kd s|krn
S|krn awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 95/124
Dbkv rj|` – |gn` !|gn` ojs`' r`bj|gkisag}
Ajs |ar`` r`fgkis !rgsgif bgno" cr`s| jil r`c`ssgki bgno'
_gsgif bgno !ckic`i|rj|gki cprt`' – Cki|rkbb`l ow ok|a rjgidjbb `t`i| jil cj|can`i| cajrjc|`rgs|gcs
– _gs`s gig|gjbbw sbkvbw lp` |k agfa gig|gjb bkss`s jil |a`i rj}glbwlp` |k gicr`jsgif cki|rgop|gif jr`j jil r`lpcgif bkss`s
– Opgb| p} kd s|krjf` !sprdjc` jil cajii`b s|krjf`" gi|`rdbkv jil
frkpilvj|`r s|krjf`' kccprs Cr`s| s`fn`i|
– ]kgi|s kd gidb`c|gki s`}jrj|`s |a` rgsgif bgno jil |a` r`c`ssgkibgno drkn |a` cr`s| s`fn`i|
– gicbpl`s |a` }`jh dbkv }kgi|" vagca kccprs va`i jbb |a` }jr|s kd |a` cj|can`i| sgnpb|ji`kpsbw cki|rgop|` rpikdd
– Bjrf`r cj|can`i|s !s|krn lprj|gki 2 |gn` kd ckic`i|rj|gki*'ajt` }`jh dbkv jd|`r c`ssj|gki kd rjgidjbb !ojsgi bjf kr |gn` bjf*'
– Gskbj|`l s|krn kd pigdkrn rjgidjbb r`spb|s gi j sgifb` }`jh`ls|krn awlrkfrj}a . |vk kr nkr` s|krns gi spcc`ssgki r`spb| gi
npb|g}b` }`jh`l ckn}b`q s|krn awlrkfrj}as
S|krn awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 96/124
_`c`ssgki+djbbgif bgno
– _`}r`s`i|s l`}b`|gki kd s|krjf` – }kgi| kd gidb`c|gki r`}r`s`i|s
|a` ckilg|gki kd njqgnpn s|krjf` – Saj}` !s}`cgjbbw o`wkil |a` gidb`c|gki }kgi|' gs `i|gr`bw
gidbp`ic`l ow |a` cj|can`i| cajrjc|`rgs|gcs
Lgscajrf` lprgif r`c`ssgki bgno gs fgt`i ow Ojri`s `zpj|gki
\a` r`c`ssgki ckis|ji| jc|pjbbw gicbpl`s
– _`c`ssgki ckis|ji| dkr sprdjc` s|krjf` !Hrs' – =)=0 |k =)?
– _`c`ssgki ckis|ji| dkr gi|`rdbkv !Hrg' – =)0 |k =)10
– _`c`ssgki ckis|ji| dkr ojs` dbkv !Hro' – =)10 |k =)77
r
| | jj|
|
| |
r
|
r |
H jva`r`
`Z
Z`ZZ
H Z
ZH ZZ
bi
?:
?:
?
:=
?
:=
‑Z= gs lgscajrf` j| |>= ‑Z|‗ gs lgscajrf` j| |gn` ‑|‗
‑Hr‗ gs r`c`ssgki ckis|ji|
Hr
> Hrs
q Hrg
q Hro
Gd jiw kd |a` |ar`` dbkvs jr` gisgfigdgcji| |a`i
r`c`ssgki ckis|ji| kd |aj| dbkv gs |jh`i js pig|w
S|krn awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 97/124
S|krnvj|`r s|krjf` !S|' r`njgigif gi |a` ojsgi j| |gn` ‑|‗ gs fgt`i ow
O`wkil |a` gidb`c|gki }kgi| }bk||gif lgscajrf` jfjgis| |gn` ki s`ngbkf }bk| !lgscajrf` ki bkf scjb` jil |gn` ki jrg|an`|gc scjb`' fgt`s
r`c`ssgki ckis|ji| js sbk}` kd |a` }bk| Dkr |a` r`c`ssgki bgno" o`wkil |a` }kgi| r`}r`s`i|gif `il kd |a`
lgr`c| rpikdd" ok|a sprdjc` s|krjf` jil gi|`rdbkv s|krjf` jr`ckisgl`r`l i`fbgfgob` jil Hrs jil Hrg jr` `zpjb |k ki` jil Hr > Hro
Vg|a |a` Hro tjbp`" ojs` dbkv dkr lgdd`r`i| ‑|‗ tjbp`s o`wkil |a`
gidb`c|gki }kgi| ki |a` r`c`ssgki bgno cji o` dkpil \k|jb lgscajrf` ngips ojs` dbkv cji o` |jh`i js |a` sprdjc` rpikdd
}rktgl`l gi|`rdbkv s|krjf` gs ckisgl`r`l i`fbgfgob`
]bk||gif |a` sprdjc` rpikdd jfjgis| |gn` ki s`ng bkf }bk| fgt`s |a`sprdjc` dbkv r`c`ssgki ckis|ji| !Hrs'
j| |
r |
| |
j|
| |
`ZH ZZa`r`
| j
Z
l| `Zl| ZS
==
=
Lgr`c| _pikdd Awlrkfrj}a !L_A'
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 98/124
J awlrkfrj}a cki|jgis sprdjc` rpikdd" gi|`rdbkv jil ojs` dbkvckn}ki`i|s – sprdjc` rpikdd jil gi|`rdbkv }p| |kf`|a`r gs
lgr`c| rpikdd !`dd`c|gt` rjgidjbb gs r`bj|`l vg|a |ags' J awlrkfrj}a sakvgif kibw lgr`c| rpikdd gs lgr`c| rpikdd
awlrkfrj}a – s`}jrj|gki kd ojs` dbkv drkn j s|krnawlrkfrj}a r`spb|s gi L_A
Ki |a` |gn` ojs` kd j awlrkfrj}a bkcj|gif |a` }kgi| va`r`
lgr`c| rpikdd `ils gs lgddgcpb| – – cji `n}grgcjbbw o` j}}rkqgnj|`l ow
L_A gs r`bj|`l |k `qc`ssgt`+`dd`c|gt` rjgidjbb aw`|kfrj}a !@_A' – _jgidjbb |aj| o`ckn`s lgr`c| rpikdd j| |a` vj|`rsa`l kp|b`| gs
hikvi js `qc`ssgt`+`dd`c|gt`+i`| rjgidjbb
– Ok|a L_A jil @_A r`}r`s`i| |a` sjn` |k|jb rjgidjbb zpji|g|w op|
gi lgdd`r`i| pig|s !@_A q Jr`j > L_A *'
?)=13)= J I
‑I‗ gs |gn` gi|`rtjb o`|v``i }`jh dbkv }kgi| jil`il kd lgr`c| rpikdd }kgi|
‑J‗ gs ojsgi jr`j gi hn?
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 99/124
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 100/124
_pikdd drkn j rjgidjbb `t`i| gicbpl`s |vk ckn}ki`i|s lgr`c| rpikdd !sprdjc`dbkv jil gi|`rdbkv' jil ojs` dbkv !frkpilvj|`r dbkv'
Lgr`c| rpi kdd cji o` s`}jrj|`l drkn |a` |k|jb rpikdd drkn j rjgi djbb `t`i|
Bjf |gn` !|b'5 \gn` o`|v``i |a` c`i|`r kd njss kd |a` rjgidjbb `t`i|
!aw`|kfrj}a' jil |aj| kd lgr`c| rpikdd !awlrkfrj}a'
@zpj|gki ow Bgisb`w !:77?'?)=
1)= J I J gs vj|`rsa`l jr`j gi hn?
S|rjgfa| bgi` J.C lgtgl`s |a` dbkv gi|k lgr`c|
rpikdd jil ojs` dbkv
\gn` bjf
Ojs` dbkv s`}jrj|gki jil L_A
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 101/124
Ojs` dbkv s`}jrj|gki jil L_A Ckis|ji|.lgscajrf` n`|akl5 jsspn` ojs` dbkv js ckis|ji| .
}rke`c| drkn |a` ngignpn ojs` dbkv gnn`lgj|`bw o`dkr` |a`o`fgiigif kd s|krn awlrkfrj}a)
Ckis|ji|.sbk}`5 Ckii`c| |a` }kgi| r`}r`s`i|gif |a` `il kd lgr`c| rpikdd ki r`c`ssgki bgno vg|a |a` o`fgiigif kd s|krnawlrkfrj}a |k s`}jrj|` |a` ojs` dbkv)
Ckicjt` !nks| r`jbgs|gc'5 Jsspn` l`cr`js` kd ojs` dbkvl`cr`js`s vg|a |a` gicr`js` kd s|r`jn dbkv p} |k |a` }`jh kd |a` s|krn – drkn |a`r` ckii`c| |k |a` }kgi| r`}r`s`i|gif |a``il kd lgr`c| rpikdd ki r`c`ssgki bgno dkr s`}jrj|gif |a` ojs`dbkv)
Njs|`r l`}b`|gki cprt` n`|akl5 lrjv j |jif`i| |k |a`r`c`ssgki bgno o`wkil |a` }kgi| r`}r`s`i|gif . drkn |a`r`ckii`c| vg|a |a` o`fgiigif kd |a` s|krn awlrkfrj}a dkrs`}jrj|gif |a` ojs` dbkv)
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 102/124
Pig| Awlrkfrj}a !PA' Pig| awlrkfrj}a5 \a` cj|can`i| dbkv r`s}kis` |k j pig| !:
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 103/124
Pig| awlrkfrj}a5 \a` cj|can`i| dbkv r`s}kis` |k j pig| !:cn' kd `dd`c|gt` rjgidjbb kccprrgif kt`r j fgt`i lprj|gki !L ars'
Lprj|gki gs gilgcj|`l js }r`dgq |k PA !4a.PA'
Tkbpn` kd vj|`r gs `zpjb |k |a` rjgidjbb `qc`ss jil jt`rjf`gi|`isg|w kd `qc`ss rjgidjbb gs !:+L'
]r`lgc|gki kd dbkkl awlrkfrj}as jr` lki` ow pig| awlrkfrj}an`|akl !spff`s|`l ow Sa`rnji gi :73?
Jsspn}|gkis njl` gi |a` pig| awlrkfrj}a ckis|rpc|gki – @dd`c|gt` rjgidjbb gs pigdkrnbw lgs|rgop|`l kt`r |a` vakb`
cj|can`i| jil |a` lprj|gki)
– Lgr`c| rpikdd }rkc`ss gs bgi`jr gi sp}`r}ksg|gki jil}rk}kr|gkijbg|w . gd rjgidjbb gs lkpob`l rpikdd jbsk lkpob`l . jiw
rpikdd drkn j bj|`r |gn` cji o` jll`l |k |a` }r`tgkps rpikdd) – \a` rjgidjbb rpikdd }rkc`ss gs s|j|gkijrw . ik cajif` vg|a |gn`)
ni
n
ngng P _Z:
:
_n gs ̀ dd`c|gt` rjgidjbb
Pg gs pig| awlrkfrj}a krlgij|`s
Zg gs lgr`c| rpikdd awlrkfrj}a krlgij|`s
n gs |a` ipno`r kd rjgidjbb tjbp`s
Pig| Awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 104/124
L_A !Lgr`c| _pikdd Awlrkfrj}a' cji o` ko|jgi`l drkn |a` L.PA !L lprj|gki pig| awlrkfrj}a' ow sp}`r}ksg|gkigif
Gd rjgidjbb `qc`ss gs _ |gn`s |a` pig| rjgidjbb `qc`ss" |a`i |a`L_A r`spb|gif vgbb o` _ |gn`s |a` L.PA – Jr`j pil`r |a` L_A vgbb o` r |gn`s |a` jr`j pil`r |a` L.PA
– \gn` ojs` kd |a` awlrkfrj}a vgbb r`njgi |a` sjn`
\vk ckis`cp|gt` rjgidjbb `t`i|s jr` cknogi`l ow sp}`r.}ksg|gkigif !|gn` fj} o`|v``i |a` `t`i|s gs |jh`i cjr` kd' – \gn` ojs` kd |a` r`spb|ji| L_A vgbb o` `zpjb |k |a` L.PA |gn`
ojs` }bps |gn` bjf o`|v``i |a` |vk rjgidjbb `t`i|s
Ckis|rpc|gif j L_A dkr j ojsgi dkr j rjgidjbb `t`i| ki` i``ls – Pig| awlrkfrj}a kd j}}rk}rgj|` lprj|gki
– S|krn aw`|kfrj}a – `qc`ss rjgidjbb aw`|kfrj}a !@_A' gs ko|jgi`ldrkn g| |arkpfa l`lpc|gif gig|gjb bkss`s jil gidgb|rj|gki bkss`s
– @_A gs lgtgl`l gi|k dgig|` ipno`r kd obkchs `jca kd L lprj|gki
– \arkpfa sp}`r}ksg|gkigif L_A gs ko|jgi`l
– Jllg|gki kd ojs` dbkv |k |a` L_A cji fgt` dbkkl+s|krnawlrkfrj}a
Pig| Awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 105/124
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 106/124
J rgt`r cj|can`i| ajs j ? akpr pig| awlrkfrj}a vg|a |a` krlgij|`s =" 3" ::" 30" 00" 44" 43" <="??" 7 jil ? n3+s) Jsspn` |aj| |a` ojs` dbkv j| |gn` |>= akpr gs ?= n3+s jil bgi`jrbwgicr`js`s |k << n3+s j| |>?< akprs)
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 107/124
gicr`js`s |k << n +s j| | ?< akprs)
j' Ckn}p|` |a` awlrkfrj}a r`spb|gif drkn |vk spcc`ssgt` ? akpr }`rgkls kd `dd`c|gt` rjgi kd ?)=cn jil :)0 cn r`s}`c|gt`bw)
o' \k }r`t`i| lkvis|r`jn dbkklgif" |a` njqgnpn dbkv |k o` r`b`js`l drkn |a` cj|can`i| gss`| j| :1= n3+s) Cjbcpbj|` |a` s}jc` i``l`l |k s|kr` |a` `qc`ss vj|`r drkn |ags `t`i| !gi n 3')
L`rgtj|gki kd j Pig| Awlrkfrj}a S`b`c| s ddgcg`i| i no`r kd gskbj|`l s|krn a lrkfrj}as dkr |a`
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 108/124
S`b`c| spddgcg`i| ipno`r kd gskbj|`l s|krn awlrkfrj}as dkr |a`ojsgi cjps`l ow s|krns kd jokp| sjn` lprj|gki !º?=% L'
– \a` s|krns s`b`c|`l sakpbl o` djgrbw pigdkrn gi ok|a s}jc` jil|gn` !kt`r |a` lprj|gki jcrkss |a` cj|can`i|+ojsgi'
– Lprj|gki caks`i sakpbl o` :+3rl |k :+0|a kd |a` ojsgi bjf !dkrcj|can`i|s 9?0= hn? lprj|gki gs |jh`i js 4 akprs'
Ko|jgi Lgr`c| _pikdd Awlrkfrj}as !L_A' dkr `jca kd |a`
s`b`c|`l s|krn awlrkfrj}as !s`}jrj|` ojs` dbkv' @tjbpj|` jr`j pil`r `jca kd |a` L_A jil lgtgl` vg|a ojsgi
jr`j |k ko|jgi `qc`ss rjgidjbb l`}|a
– \a` s`b`c|`l s|krn sakpbl wg`bl : |k < cn `qc`ss rjgidjbb l`}|a
Lgtgl` krlgij|`s kd |a` L_A vg|a |a` `qc`ss rjgidjbb l`}|a dkrko|jgigif krlgij|`s dkr |a` Pig| Awlrkfrj}a !PA'
\a` npb|g}b` Pig| Awlrkfrj}as ko|jgi`l vgbb ik| o` gl`i|gcjb – cknogi` |a`n |k ko|jgi ji jt`rjf`+n`ji Pig| Awlrkfrj}a
– @qc`ss rjgidjbb l`}|a `tjbpj|`l dkr |a` n`ji Pig| Awlrkfrj}a
sakpbl o` j pig|w
Ckis|rpc|gif Dbkkl Awlrkfrj}adrkn Pig| Awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 109/124
drkn Pig| Awlrkfrj}a Pig| Awlrkfrj}a dkr |a` ojsgi jil @qc`ss _jgidjbb Aw`|kfrj}a
!@_A' kd |a` s|krn jr` i``l`l \a` @qc`ss _jgidjbb Aw`|kfrj}a gs lgtgl`l gi|k ‑i‗ obkchs vg|a
|a` lprj|gki kd |a` PA
Dkr `jca obkch dgil `qc`ss rjgidjbb l`}|a
S`fn`i| |a` |gn` ojs` kd |a` Pig| Awlrkfrj}a ow |a`lprj|gki kd |a` Pig| Awlrkfrj}a
Ckis|rpc| L_A dkr |a` obkch ow npb|g}bwgif |a` krlgij|`s kd |a` Pig| Awlrkfrj}a vg|a |a` obkch‗s `qc`ss rjgidjbb l`}|a
Sp}`r}ksg|gki L_As kd spos`zp`i| obkchs kd `qc`ss rjgidjbb |k
ko|jgi L_A dkr |a` dbkkl s|krn gi zp`s|gki
:3??3:3
:??:?
:::
P _P _P _Z
P _P _Z
P _Z
_:" _? jil _3 jr` `qc`ss rjgidjbb l`}|as dkrobkchs :" ? jil 3
P:" P? jil P3 jr` krlgij|`s kd |a` Pig|Awlrkfrj}a
Pig| awlrkfrj}as kd lgdd`r`i| lprj|gkis
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 110/124
Drkn j L.PA kd j vj|`rsa`l j \.PA cji o` l`rgt`l ow |vk
n`|akls5 Sp}`r}ksg|gki n`|akl jil S.cprt` n`|akl
Sp}`r}ksg|gki n`|akl !ps`l va`i
\+L gs ji gi|`f`r'
Lgtgl` \ gi|k i obkchs" `jca kd L
lprj|gki
L`t`bk} Lgr`c| _pikdd Awlrkfrj}a
dkr ‑\‗ rjgidjbb lprj|gki ow
sp}`r}ksg|gkigif ‑i‗ Pig|
Awlrkfrj}as kd L lprj|gki `jca Lgtgl` |a` krlgij|`s kd |a` L_A
ow ‑i‗ jil ko|jgi |a` Pig|
Awlrkfrj}a kd ‑\‗ lprj|gki
Pig| awlrkfrj}as kd lgdd`r`i| lprj|gkis!S cprt` kr S awlrkfrj}a n`|akl'
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 111/124
Ps`l dkr |a` cjs`s va`r` \+L gs ik| ji gi|`f`r
S.cprt` gs j cpnpbj|gt` dbkv cprt` l`t`bk}`l drkn j pig|awlrkfrj}a kd L lprj|gki
Krlgij|`s dkr |ags jr` ko|jgi`l drkn PA js o`bkv5
S.cprt` r`jca`s |a` njqgnpn tjbp` !Z s' j| |gn` `zpjb |k |a`
|gn` ojs` kd |a` Pig| Awlrkfrj}a
Gi|`isg|w kd rjgidjbb gs :+L jil |a` cpnpbj|gt`+njqgnpn tjbp`
gs J+L va`r` J gs ojsgi jr`j jil L gs lprj|gki kd PA
!S.cprt` kr S.awlrkfrj}a n`|akl'
| L| | L| | |
i
g
gi
ggg
P ZZkr ZZP
P Z
P P P P Z
P P ZP Z
:
:?:
:??::
)))
Z :" Z ?" )))" Z g" )))" Z i jr` krlgij|`s kd S.cprt`
P:" P?" )))" Pg" )))" Pi jr` krlgij|`s kd |a` PA
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 112/124
Dkr l`rgtgif \.akpr Pig| Awlrkfrj}a !PA' drkn L.akpr PA ckisgl`r ? L.
akpr S.cprt`s lgs}bjc`l+bjff`l ow \.akprs ki |a` |gn` jqgsKo|jgi krlgij|`s kd |a` Pig| Awlrkfrj}a js t`r|gcjb lgs|jic` o`|v``i |a`|vk S.cprt`s npb|g}bg`l ow L+\
Ca`ch va`|a`r |a` jr`j pil`r |a` PA gs r`}r`s`i|gif j pig| kd `qc`ss kr`dd`c|gt` kr i`| rjgidjbb
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 113/124
S|`}s gi l`t`bk}gif jil j}}bwgif
|a` awlrkfrj}a n`|akl
Swi|a`|gc Pig| Awlrkfrj}a Gidkrnj|gki ki rjgidjbb jil r`spb|gif Dbkkl Awlrkfrj}a gs ik|
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 114/124
Gidkrnj|gki ki rjgidjbb jil r`spb|gif Dbkkl Awlrkfrj}a gs ik|jtjgbjob` dkr njiw vj|`rsa`ls jil Pig| Awlrkfrj}as cji ik| o`l`rgt`l – gi spca cjs`s Swi|a`|gc Pig| Awlrkfrj}as jr` ps`l
Swi|a`|gc pig| awlrkfrj}as !SPA' jr` l`t`bk}`l ow psgif `n}grgcjb`zpj|gkis r`bj|gif |a` sjbg`i| awlrkfrj}a cajrjc|`rgs|gcs vg|a |a`ojsgi cajrjc|`rgs|gcs
\a`s` `n}grgcjb `zpj|gkis !ajtgif kibw r`fgkijb tjbglg|w' jr` ps`l |kdgil |a` cajrjc|`rgs|gcs kd |a` SPA
– ]`jh lgscajrf` !Z }' – S|jiljrl rjgidjbb lprj|gki !|r'
– Bjf |gn` !|}'
– Pig| awlrkfrj}a vgl|a j| 60% kd Z } !V60'
– Pig| awlrkfrj}a vgl|a j| 0=% kd Z } !V0='
– \gn` ojs` kd |a` pig| awlrkfrj}a !\o'
Psgif |a`s` cajrjc|`rgs|gcs j |`i|j|gt` SPA gs sh`|ca`l – drkn g| S.cprt` gs ckis|rpc|`l jil snkk|a`i`l |k r`nkt` hgihs – SPA gs|a`i l`rgt`l drkn |a` S.cprt` – ca`ch va`|a`r |a` jr`j pil`r |a`SPA r`}r`s`i|s j pig| `qc`ss rjgidjbb
– Sgic` \o gs |a` b`js| jccprj|` }jrjn`|`r" jleps| g| |k ko|jgi |a` SPA
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 115/124
Swi|a`|gc Pig| Awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 116/124
!Ojsgi' Bjf |gn` !|}'5
\gn` gi|`rtjb o`|v``i |a` ngl}kgi| kd `qc`ss rjgidjbb jil
}`jh kd |a` SPA
_`}r`s`i|s n`ji |gn` kd |rjt`b kd vj|`r drkn jbb }jr|s kd |a`
vj|`rsa`l |k |a` vj|`rsa`l kp|b`|
Siwl`r‗s `n}grgcjb `zpj|gki !jil Bgisb`w `| jb nklgdgcj|gki'
i
cj|B }
cj| }
S
B BC |
B BC |
)
) 3)= |} gs ojsgi bjf gi akprsB gs ojsgi b`if|a gi hn jbkif }rgicg}jb dbkv }j|a
Bcj gs }rgicg}jb cajii`b b`if|a drkn kp|b`| |k |a`}kgi| k}}ksg|` |k vj|`rsa`l c`i|rkgl gi hn
S gs ojsgi sbk}`
C| gs ckis|ji| r`}r`s`i|gif |a` vj|`rsa`ls sbk}` jil s|krjf` `dd`c|s
g|s rjif` gs :)33.:)40 jil r`}kr|`l rjif` gs =)3 |k 4)=
C|B jil i jr` ojsgi ckis|ji|s ‑i‗ gs |jh`i js =)31 dkr ojsgis gi PSJ
C|B tjbp` gs :)6:0 dkr nkpi|jgips r`fgki" :)=3 dkr dkk| agbb r`fgki jil=)0 dkr tjbb`w r`fgki
Swi|a`|gc Pig| Awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 117/124
Swi|a`|gc Pig| Awlrkfrj}a
S|jiljrl `qc`ss rjgidjbb lprj|gki gi akprs !|r' –sgngbjr |k L
0)0
}r
| L|
Ki` cji |jh` j iki.s|jiljrl `qc`ss rjgidjbb lprj|gki !|_'"op| dkr |ags |a` ojsgi bjf i``ls ckrr`c|gki !|}‗'
<???:
<
& _ }
r _ } }
| | | | | | A`r` |r gs |jh`i js |}+0)0
\gn` ojs` kd |a` SPA !\o'
akprs|
| \ ljws|
\ r }o
}
o
?)013
:s| `zpj|gki kt`r`s|gnj|`s \o dkr snjbb ojsgis jil ?il !\jwbkr jilScavjr|u' `zpj|gki gs spff`s|`l
\o
gs |jh`i js ji gi|`f`r lgtgsgob` ow |r
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 118/124
Swi|a`|gc Pig| Awlrkfrj}a
J
zz A`r`
zV
}=1):0=
16)0
60):
0=60
V V
Pig| awlrkfrj}a vgl|a j| 60% kd z} !V60'
Pig| awlrkfrj}a vgl|a j| 0=% kd z} !V0='
A`r` V0= jil V60 jr` gi akprs
]`jh lgscajrf` !z}' gi n3+s`c)
}
}
}|
JC z
61)?
J gs cj|can`i| jr`j gi hn?
C} gs j r`fgkijb ckis|ji| jil r`}r`s`i|sr`|`i|gki jil s|krjf` cj}jcg|w kd vj|`rsa`l
g|s tjbp` rjif`5 =)3:.=)73
SCS Lgn`isgkib`ss Pig| Awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 119/124
L`t`bk}`l ow Tgc|kr Nkchps
L`rgt`l ojs`l ki j bjrf` ipno`r kd Pig| Awlrkfrj}as dkrojsgis kd tjrg`l cajrjc|`rgs|gcs
– Jd|`r jt`rjfgif kp| |a` Pig| Awlrkfrj}as" |a` r`spb|ji| Pig|Awlrkfrj}a gs njl` lgn`isgkib`ss ow |jhgif Z+Z } jil |+|}
J cprtgbgi`jr Lgn`isgkib`ss Pig| Awlrkfrj}a cji o`
r`}r`s`i|`l ow ji `zpgtjb`i| \rgjifpbjr Pig| Awlrkfrj}a \a` Pig| Awlrkfrj}a ajs 36)0% kd g|s jr`j ki |a` rgsgif sgl`
jil r`s| 4?)0% ki r`c`ssgki sgl` !jr`j pil`r |a` cprt` gs ‑:‗'
Ckisgl`rgif \rgjifpbjr Pig| Awlrkfrj}a" }`jh rj|` !z}' vgbb o`
r }
}\ \
z
?:
z}
gs }`jh rj|`
\} gs |gn` kd rgs` jil \r gs |gn` kd r`c`ssgki
\r+\} gs |jh`i js r`c`ssgki |k rgsgif bgno rj|gk
\}(\r>\o !\o gs |gn` ojs` kd \rgjifpbjr PA'
\gn` Lgscajrf` Njss Cprt`
_j|gks dkr lgn`isgkib`ss pig|awlrkfrj}a jil njss cprt` \gn`
_j|gks !|+|}'
Lgscajrf`
_j|gks !z+z}'
Njss Cprt`
_j|gks !Zj +Z'
: 4 = 04= = 60:
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 120/124
_j|gks !|+|}' _j|gks !z+z}' _j|gks !Zj +Z'
= =)== =)===
=): =)=3 =)==: =)? =):= =)==4
=)3 =):7 =)=:?
=)< =)3: =)=30
=)0 =)<6 =)=40
=)4 =)44 =):=6
=)6 =)1? =):43
=)1 =)73 =)??1
=)7 =)77 =)3==
:)= :)== =)360
:): =)77 =)<0=
:)? =)73 =)0??
:)3 =)14 =)017
:)< =)61 =)40=
:)0 =)41 =)6==
:)4 =)04= =)60:
:)6 =)<4= =)67=
:)1 =)37= =)1?? :)7 =)33= =)1<7
?)= =)?1= =)16:
?)? =)?=6 =)7=1
?)< =):<6 =)73<
?)4 =):=6 =)703
?)1 =)=66 =)746
3)= =)=00 =)766
3)? =)=<= =)71<
3)< =)=?7 =)717
3)4 =)=?: =)773
3)1 =)=:0 =)770
<)= =)=:: =)776
<)0 =)==0 =)777
0)=
=)===
:)===
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 121/124
SCS Lgn`isgkib`ss Pig| Awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 122/124
cc }
cbjfcbjf }
\ L Akv\ L\
\ \ a`r`\ L
\ L
\
:33)=;'!6):
4)=4)=??
Hikvgif bjf |gn`" \bjf !kr |gn` kd ckic`i|rj|gki" \c' jil r`c`ssgki|k rgsgif bgno rj|gk ki` cji ps` |a` SCS Lgn`isgkib`ss PA
Gd `qc`ss rjgidjbb l`}|a gs Z jil jr`j kd |a` lrjgijf` ojsgi gs J
r }
d
}\ \
Z J }z
))?) }d !}`jhgif djc|kr' gs pig| ckit`rsgki djc|kr
\}+\r gs r`c`ssgki |k rgsgif bgno rj|gk
z gs dbkv rj|` j| |gn` \
Va`i Z gs gi gica`s" \ gi akprs" J gi szpjr` ngb`s jil z} gi
d|3
+s`c) |a`i ]d tjbp`s vgbb o` js fgt`i gi |a` |job`\r+\} jil }d jr` r`bj|`l !gicr`jsgif \r+\} l`cr`js`s }d '
Sgic` z+z} jil \+\} jr` hikvi ki` cji l`t`bk} z t`rsps \r`bj|gkisag} jil ckis|rpc| |a` Lgr`c| _pikdd Awlrkfrj}a
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 123/124
F`i`rjb L`scrg}|gki ]`jhgifDjc|kr !]d '
Bgno _j|gk !\r +\}'!_`c`ssgki |k _gsgif'
Proji jr`js8 s|``} sbk}`s 060 :)?0 \w}gcjb SCS <1< :)46
Ngq`l proji+rprjb <== ?)?0
_prjb" rkbbgif agbbs 3== 3)33
_prjb" sbgfa| sbk}`s ?== 0)0 _prjb" t`rw dbj| :== :?)=
Awlrkfrj}a }`jhgif djc|krs jil r`c`ssgki bgno rj|gks
!Vjig`bgs|j" `| jb) :776'
L`bgi`j|` |a` ojsgi jil l`dgi` okpiljrw
7/23/2019 Stormwater Hydrology
http://slidepdf.com/reader/full/stormwater-hydrology 124/124
Dkr `jca c`bb ki |a` okpiljrw dgil bjf |gn`"jil dgil b`if|a |k |a` kp|b`|
Dgil |a` bkif`s| |gn` kr b`if|a |k |a` kp|b`|"jil dgil |gn` kd ckic`i|rj|gki dkr |a` ojsgi
Dgil }`jh dbkv !z}' jil |gn` |k }`jh !\}'
S`b`c| s|krn lprj|gki
Dgil r`c`ssgki |k rgsgif bgno rj|gk jilcjbcpbj|` r`c`ssgki bgno b`if|a
Ckis|rpc| lgn`isgkib`ss |rgjifpbjr pig| awlrkfrj}a
Top Related