HECRAS Basis Input HECRAS – sawyisi monacemebi

HECRAS Basis InputHECRAS – sawyisi

monacemebi

by G. ParodiWRS – ITC – The Netherlands

g. parodiWRS-ITC- niderlandebi

The BasicssafuZvlebi

Geometry Data.

geometriuli monacemebi

Flow Data.

dinebis monacemebi

Perform Hydraulic Computations

hidravlikuri gaTvlebis Sesruleba

Viewing the Output

Sedegebis gamoxazva

Extent of study area Sesaswavli regionis

ganfeniloba Area of interest interesis are Boundary conditions sasazRvro pirobebi Section locations and

orientation seqciebis adgilmdebareoba

da orientacia

Before you start…Layout the modelmanam daviwyebT....dagegmeT modeli

Geometry Data - the basicsgeometriuli monacemebi - safuZvlebi

Cross-section information informacia ganivi kveTebis Sesaxeb Roughness coefficients xorklianobis koeficienti Distance between sections seqciebs Soris manZili Bridge/culvert data monacemebi xidebis/wyalsadenebis

Sesaxeb

Cross Section Locationsganivi kveTebis adgilmdebareoba

Place and measure cross sections when there is a change in:ganaTavseT da azomeT ganivi kveTebi rodesac icvleba: Slope ferdobis daxra Discharge xarji Roughness xorklianoba Channel shape dinebis forma Control (bridge, levee, weir, etc) kontroli (xidi, jebirebi, sagubari, a.S)

Cross section orientationganivi kveTebis orientacia

Very important Zalian

mniSvnelovania Survey perpendicular

to flow aageT dinebis

perpendikularulad May not be a straight

line araa savaldebulo

iyos swori xazi

flowto

perpendikularuliadinebis mimarT

X1 X2

Cross Section Spacing: Where to measure?Sualedebi ganiv kveTebs Soris: sad gavzomoT?

In general: zogadad: Widely spaced for flat, very large rivers and closer for steep small streams farTodaa ganlagebuli brtyeli, Zalian msxvili mdinareebisTvis ufro axlos mcire da cicabo

nakadebisTvis Very large rivers (Mississippi) on the order of a mile (1600 m) Zalian msxvili mdinareebisTvis (misisipi) 1 milis rigis (1600m) For large rivers on the order of 1000 feet (300 m) msxvili mdinareebisTvis 1000 futis rigis (300m) For slower streams on the order of 200 feet (60 m) neli dinebebisTvis 200 futis rigis (60m) For small creeks creeks of 25 feet (8 m) patara ubeebisTvis 25 futis rigis (8m) For supercritical reaches, on the order of 10 to 50 feet (3 to 15 m) superkritikuli gawvdomisTvis 10 - 50 futis is rigis (3 dan 15 m-mde) For drop structures, as low as 5 feet (1 m) danawevrebuli struqturebisTvis 5 fuTze naklebi (1 metramde) Can interpolate if reasonable (check results) SesaZloa interpolireba Tu aqvs azri (gadaamowmeT Sedegebi) Not too close (1’, may drop friction loses) Zalian axlos ara (1’, SeiZleba daanawevros xaxunis danakargi)

flowto

High flowRrma dinebaLow flowsdabali dineba

Reach Lengths - Are they constant?gawvdomis sigrZe – mudmivia?

perpendikularuliadinebis mimarT

Survey shots must describe the channel and overbank flow area

agegmvis mizania aRweros arxis (dinebis) da datborvis area

Section should extend across the entire floodplain

seqciebi unda vrceldebodnen mTeli xeobis gaswvriv

Plot cross-section data, especially electronic surveys

ganivi kveTis monacemebis amoxazva, gansakuTrebiT cifruli

agegmareba

Take photographs

gadaiReT suraTebi

Assume modeler has never seen the stream

dauSviT, rom modelis Semqmnels arasodes unaxia mdinare

Note vegetation changes in cross-section e.g. field, trees, grass buffer, etc.

aRniSneT mcenareuli safaris cvalebadoba ganiv kveTebSi, magaliTad:

saZovrebi, xeebi, balaxeuli buferebi da sxva

No 3-point cross-sections

ara 3 wertiliani ganivi kveTebi

Surveytopografiuli agegmareba

HEC-RAS 3.0 Hydraulic User Manual, Figure 5.1

•Profile road and bridge deck

centerline

•gzis da xidis savali nawilis

RerZuli profilebi

•Pier width, location

•pirsis sigane,

adgilmdebareoba

•Low Chord Elevation

•xidis savali nawilis

umdablesi horizonti

•Skew Angle (bridge - stream)

•moxris kuTxe (xidi – nakadi)

•Bridge opening

•xidis gaxsnili nawili

Bridge Surveysxidebis agegmareba

SekumSvis gawvdoma

gafarTovebis gawvdoma

Basic Input - the modelmonacemebis Setanis ZiriTadi principebi -

modeli

Double Click on HEC-RAS icon.

orjer daaWireT HEC-RAS-is Rilaks

Starting HEC-RAS – dasawyisi

Establish the Unit first pirvel rigSi miuTiTeT,

erTeulovani sistema Click on File - New Project from the

main menu to start a project imisTvis, rom daviwyoT axali

proeqti, davaWiroT ZiriTad meniuSi “File - New Project ” Rilaks.

Starting a Project- proeqtis dawyeba

Select a working directory SearCieT samuSao saqaRalde Then enter project title and file name Semdeg SeiyvaneT proeqtis saTauri da failis saxeli

Starting a Projectproeqtis dawyeba

Starting a Projectproeqtis dawyeba

Check the unit system before accepting. SeamowmeT erTeulovani sistema sanam

daeTanxmebiT.

Units can be change before or after the model is created.

erTeulovani sistemis Secvla SesaZlebelia modelis Seqmnamde an Seqmnis Semdeg.

Stream Geometry Datanakadis geometriuli monacemebi To add data, click on Edit and Geometric Data monacemebis dasamateblad daaWireT “Edit ”

Rilaks da SearCieT “Geometric data” (geometriuli monacemebi)

Or, you can click on the Geometry Editor button:

an, SeiZleba SearCioT “Geometry editor”-is Rilaki

Suggested order of data entry: monacemebis Setanis sasurveli Tanmimdevroba:

Add River Reach(es) along with any Junctions (actually, this must be first).

daumateT mdinaris gawvdoma(ebi) yvela SekavSirebis gaswvriv (es unda iyos sawyisi qmedeba)

Add Cross-Section names, elevation-station data, ‘n’ values, bank stations, reach lengths, loss coefficients, etc.

SeiyvaneT ganivi kveTebis saxelebi, simaRlis-punqtebis monacemebi, “n” sidide, gawvdomis sigrZe, danakargis koeficienti da sxva.

Add Road/Bridge/Culvert and/or Weir/Spillway data. SeiyvaneT monacemebi gzebis, xidebis, milsadenebis

an/da wyalgadmosaSvebebis Sesaxeb.

Stream Geometry Datanakadis geometriuli monacemebi

River System Schematicmdinaris sistemis sqematizacia

Must be added before any other features.

unda iyos Setanili sanam sxva monacemebs miawvdiT programas.

Draw and connect the reaches of the stream system.

daxazeT da SeakavSireT mdinareTa sistemis yvela Senakadi.

Draw from upstream to downstream, which will coincide with a flow direction arrow - generally from top

of screen to bottom. Double click on last point to end.

aageT sqema zeda dinebidan qveda dinebisken, romelic Seesabameba dinebis mimarTulebas

– zogadad ekranis zemodan Zirisken. sqematuri naxazis dasasruleblad orjer daaWireT

mausis saSualebiT bolo wertils.

Connection of 3 reaches is a junction.

3 Senakadis dakavSireba (SeerTeba) aris SekavSireba

Can model from single reach to complicated networks. The river can even split apart and then come

back together.

SesaZlebelia modelireba rogorc erTi Senakadis, aseve mdinareTa rTuli qselis. mdinare

SeiZleba gaiyos nawilebad da mere isev SeerTdes.

Can accentuate by adding background bitmap.

SesaZlebelia aqcentebis gamokveTa rastruli rukis damatebiT.


To add a River Reach, select the River

Reach button from the Cross-Section

Editor Window.

imisTvis rom mdinaris gawvdoma

davamatoT, avirCioT Rilaki “River Reach ”

ganivi kveTis redaqtoris fanjridan

Then add line(s) representing the

schematic of the river(s) you are

modeling. Single click between each

segment of the line. After your last line

segment, double click to end.

Semdeg daamateT xazi(ebi), romlebic

asaxaven mdinaris(ebis) sqematur

ganlagebas. TiTojer daaWireT mdinaris

xazovan segmentebs Soris. bolo

segmentis asaxvis Semdeg orjer

daaWireT mausis marcxena Rilaks.


A window then pops up to allow you to enter the:

gamoCndeba fanjara romelic saSualebas iZleva SeiyvanoT:

River name mdinaris saxeli

Reach name gawvdomis saxeli


The program then displays the

river and its name in blue. The

reach name is in black.

amis Semdeg programa

gamoaCens mdinares da mis

saxels lurjad xolo gawvdomis

saxeli Savia.

Tributaries and/or additional

reaches can be added to the

main reach using the same

procedure.

igive proceduris gamoyenebiT

SesaZlebelia Senakadebis an/da

damatebiTi gawvdomis damateba

ZiriTad mdinarisTvis.

Adding Cross Sections to Reachesganivi kveTebis damateba gawvdomisTvis.

To add cross-section data, click on the “Cross-Section” button from the Geometry Data Window.

ganivi kveTebis monacemebis dasamateblad daaWireT “Cross-Section” Rilaks geometriuli monacemebis fanjaraSi.

This brings up the Cross Section Data window from where you choose “Options” and then “Add a new Cross-Section…”

es gamoaCens ganivi kveTis monacemTa fanjaras saidanac “Options” –is arCeviT, SesaZlebelia axali ganivi kveTis damateba “Add a new Cross-Section…”

32

1

Adding Cross Sections to Reachesganivi kveTis damateba gawvdomisTvis

Enter the cross-section name (it must be a number

daumateT ganivi kveTis saxeli. (is unda iyos ricxvi

It must be in numerical order - upstream = highest number)

and select OK.

is unda iyos ricxobrivi Tanmimdevrobis - zeda dineba =

udidesi mniSvnelobiT) da Semdgom airCieT Tanxmobis

Rilaki “ok”.

Numbering is not related to progressive.

gadanomrva araa dakavSirebuli mzardobasTan.

To add a cross section between two existing ones, add a

number in between.

imisTvis, rom CaamatoT ganivi kveTi or arsebul ganiv

kveTs Soris, davmateT maT Soris ricxvi.

Number can be real or integers.

ricxvebi SeiZleba iyos realuri an mTeli.

Entering Cross Section Dataganivi kveTis monacemebis Seyvana

You can enter a lengthy description of the cross-section.

SesaZlebelia SeviyvanoT ganivi kveTis grZivi aRweriloba.

Note: Orientation is looking downstreamSeniSvna: orientacia ganisazRvreba qveda dinebisken xedvis mixedviT.

Note help note


This is the main Cross-Section Data window.

Here you enter the basic cross-section data such

as elevation-station data, reach lengths, ‘n’

values, bank stations, and contraction and

expansion loss coefficients.

es aris ganivi kveTis monacemebis ZiriTadi

fanjara. aq Segvyavs ZiriTadi monacemebi

ganivi kveTis Sesaxeb, iseTi informacia

rogoricaa simaRlis sadguris monacemebi,

gawvdomis sigrZe, “n ” sidide, sanapiro

sadgurebi da SekumSvis da gafarToebis

koeficientebi.


There are several options available to further

refine the cross section data.

arsebobs ramodenime xelmisawvdomi

paramertri ganivi kveTebis Semdgomi

daxvewvisTvis. File editing tools

failis redaqtirebis iaraRebi Geometric transformations and rescaling tools

geometriuli transformaciis da

masStabis Secvlis iaraRebi Editor of blocking, no flow and disturbances

blokirebis redaqtireba, ara dineba da

areva/aSliloba Editors and rescaling of roughness

xorklianobis redaqtori da masStabis

Semcvleli


A quick visual check of the data is available through the “Plot Cross Section (in separate window)“ option.

profilis swrafi vizualizaciaa xelmisawvdomi da ixsneba “Plot Cross Section”-is gamoZaxebiT (gancalkevebul fanjaraSi).

In ‘x’ the progressive

“X”-Si progresuli

In ‘y’ the absolute elevation with respect to a datum

“Y”-Si absolituri simaRle datumTan mimarTebaSi

Dots show stations

wertilebi gviCveneben saguSagoebs

Red dots separate channel from banks (left and right)

wiTeli wertilebi ganacalkeveben arxs napirisgan (marjvenas da marcxenas)

‘n’ values display on top

“N” sidide gamosaxulia zemo nawilSi

Coordinates display as the mouse is moved around.

koordinatebi gamosaxulia kursorze da icvleba moZraobisas

ORIENTATION IS LOOKING DOWNSTREAM!!

orientacia qveda dinebiskenaa

!!!

XSections can be plotted from the editor.

X seqcia SeiZleba gamosaxuli iyos redaqtoris daxmarebiT



Other but present sections can be shown in the same plot. sxva, magram arsebuli seqcia SeiZleba iyos naCvenebi igive naxazSi Ideal to check relative shape and elevation differences. idealuria sxvadasxva ganivi kveTis formis da gansxvavebis Sesadareblad

X-sections should extend across the entire floodplain and be perpendicular to anticipated flow lines (approximately perpendicular

to ground contour lines).

X seqciebi unda gaiWimos mTeli datborvis zonis gaswvriv da unda iyvnen perpendikularulebi winaswar gansazRvruli

dinebis xazisadmi (daaxloebiT perpendikularuli izoxazis mimarT.).

X-sections should accurately represent stream and floodplain geometry. Put in where changes occur in discharge, slope, shape,

roughness, and bridges.

X seqcia akuratulad unda gamoxatavdes nakads da datborili regionis geometrias. asaxavdes cvlilebebs xarjSi,

daxraSi, formaSi, xorklianobaSi, da xidebSi.

Enter X-Section elevation-station data from left to right as seen when looking downstream.

SeiyvaneT X seqciis simaRlis-sadguris monacemebi marcxnidan marjvniv rogorc Cans Tu vuyurebT qvedadinebisken.

Cross-Sections should start far enough downstream to “zero out” any errors in boundary conditions assumptions (for sub-critical

profile). Far from upstream for super-critical flow. The section of analysis should be farm from boundary errors.

ganivi kveTebi unda iwyebodes sakmarisad Sors qveda dinebisken “zero out”, sasazRvro pirobaTa varaudis (sub-

kritikuli profilisTvis) yvela cdomilebisgan. Sors zeda dinebisgan super-kritikuli dinebisTvis. analizis seqcia unda iyos

Sors sasazRvro cdomilebisgan.

Notes on Cross-Section DataSeniSvnebi ganivi kveTebis monacemebTan dakavSirebiT

Location of X-sections within a reach varies with the intensity of the study and the conditions of

the reach

X-seqciebis ganlageba dinebis gawvdomaSi icvleba Seswavlis intensivobasTan da Senakadis

mdgomareobasTan erTad.

The choice of friction loss equations will also affect X-section spacing and predicted flood

elevations

xaxunis danakargis gantolebis SerCeva, aseve zegavlenas axdens X seqciis intervalze da wylis

donis prognozirebaze

Higher number X-section river stations are assumed to be upstream of lower number river

stations. Slope areas require more X-sections.

X seqciebis raodenobis mateba xdeba qveda dinebidan zeda dinebis mimarTulebiT. cicabo

regionebi moiTxoven met X seqcias.

The left side of the X-section, looking downstream, is assumed to have the lower X values and

progress right as the X values increase, (can not narrow the section)

X seqciis marcxena mxares, dinebis mimarTulebiT, iTvleba, rom aqvs mcire X sidide da

progresireba xdeba marjvena mxares.

Notes on Cross-Section Data (cont)SeniSvnebi ganivi kveTebis monacemebTan dakavSirebiT

The left and right channel banks, must be given at a station located in the X-section elevation-station data set. (Figure shows only

right bank)

dinebis marjvena da marcxena napirebi unda iyvnen mocemulni sadgurebSi, romelic ganlagebulia X seqciis simaRlis

sadguris monacemTa jgufSi (suraTze gamosaxulia marjvena napiri).

Boundaries are fixed, can not reflect changes during a storm (scour deposition).

sazRvrebi fiqsirebulia, ar SeuZliaT asaxon qariSxliT gamowveuli cvlilebebi (gawmendili naleqebi)

X-section endpoints that are below the computed water surface profile will be extended vertically to contain the routed flows with

area/wetted perimeter reflecting this boundary condition. To avoid this, be certain that the cross section extends till a place where

flood does not occur.

X seqciis bolo wertilebi, romelic ganlagebulia gadaTvlili wylis profilis dabla, gaiSleba vertikalurad raTa moicvas

mimarTuli dineba dasvelebis perimetriTurT romelic asaxavs sasazRvro pirobebs. imisaTvis rom es Tavidan aviciloT,

darwmundiT rom profili gadaWimulia im adgilamde, sadac wyaldidoba araa mosalodneli.

Notes on Cross-Section Data (cont.)SeniSvnebi ganivi kveTebis monacemebTan dakavSirebiT

Better right bank endpointsaukeTeso bolo wertili marjvena napirisTvis

X original right bank endpointX sawyisi marjvena sanapiros bolo wertili

Vertical extension of the sectionendpoint if the water floods it

vertikaluri ganvrcoba seqciis bolo wertilisTvis, Tu wyali datboravs mas.


Consider what is being modeled. The program can only reflect what is being entered.

warmoidgineT is, risi modelirebac daiwyeT. programa asaxavs moxlod imas, rac iyo Setanili

For example: unless this hole is blocked, the model will assume that this area conveys flowmagaliTad: Tu arxi ar aris dablokili, modeli CaTvlis, rom es zona aris gadazidvis zona

By reachgawvdomis mixedviT


HEC-RAS has an option to create interpolated cross sections. It can be used to create more “in between” sections as long as there are not section singularities.

HEC-RAS- s aqvs parametri Seqmnas interpolirebuli ganivi kveTebi. es parametri SeiZleba gamoviyenoT, segmentebs “Soris” meti ganivi kveTis Sesaqmnelad, iqamde, manam ar SeiniSneba seqciis specifikuroba.


HEC-RAS has an option to create interpolated cross sections in a reach or between two sections

HEC-RAS-s aqvs funqcia, romelic qmnis interpolirebul ganiv kveTs Senakadis gawvdomis or seqcias Soris

Originalsections Interpol.

sections

Measured distances between X-Sections, reported as distance to D.S. X-Sections.gazomili distancia X-seqciebs Soris, warmodgenilia rogorc, manZili Dqveda

dinebis-seqciebs Soris

3 distances!!: Left overbank, right overbank, and channel 3 saxis manZili!!: marcxena sanapiro, marjvena sanapiro da arxi They can be very different for channels with large meander or in a bend of a river. isini SeiZleba iyvnen Zalian gansxvavebulni didi meandreebiani (klaknili) nakadebisTvis an

mdinaris moxvevis adgilebSi. A discharge weighted total reach length is determined by HECRAS based on the discharges in the

main channel and left and right overbank segments. Xarjis datvirTvis gawvdomis sruli sigrZe, ganisazRvreba HECRAS -is mier ZiriTadi arxis

xarjis da marcxena da marjvena datborvis zonebis segmentebze dayrdnobiT.

robchlob

robrobchchloblob

QQQ

QLQLQLL

X1 X2

Reach Lengthsgawvdomis sigrZe

Expansion & Contraction CoefficientsgafarTovebis da kumSvis koeficienti

Typical values for gradual transitions in supercritical flow are 0.05 for contraction and 0.10 for

expansions.

superkritikul dinebaSi tipiuri sidideebi TandaTanobiTi gadasvlisTvis aris

0.5. kumSivsTvis da 0.10 gafarToebisTvis.

Constructed prismatic channels should have expansion and contraction coefficients of 0.0

agebul prizmul arxisaTvis rogorc wesi gafarTovebis da kumSvis koeficienti

aris 0.0

ContractionkumSva

ExpansiongafarToveba

No Transitionar gvaqvs gadasvla

0.0 0.0

Gradual Transition (default)TandaTanobiTi gadasvla

0.1 0.3

Typical Bridge Transitiontipiuri xidis gasdasvla

0.3 0.5

Ineffective Flow AreasuSedego dinebis zona

Ineffective flow areas are used to model portions of the cross-section in which water will

pond, but the velocity of that water in the downstream direction is equal to zero.

araefeqturi dinebis are gamoiyeneba im regionebis modelirebisTvis, sadac ganivi kveTebis

garkveul nawilSi xdeba datborva, magram wylis dinebis siCqare qveda dinebisken utoldeba

nuls

This water is included in the storage and wetted cross section parameters, but not in the

active flow area.

am wylis odenoba Sedis “sacav” wylis raodenobaSi da svel perimetrebSi, magram ar

ganixileba, rogorc aqtiuri dinebis are.

No additional wetted parameter is added to the active flow area (unlike encroachments).

damatebiTi sveli perimetri ar emateba aqtiuri dinebis ares

Once ineffective flow area is overtopped, then that specific area is no longer considered

ineffective.

mas mere, rac araefeqturi dinebis are daitboreba, gansazRvruli are aRar ganixileba, rogorc

araefeqturi

Commonly used in culverts, near road crossings.

rogor wesi gamoiyeneba gzis gadakveTebTan arsebuli wyalsadeni milebisTvis


Two types of Ineffective Flow Areas :

ori tipis araefeqturi dinebis are :

1. Normal where you supply left and right stations with elevations

which block flow to the left of the left station and to the right of the

right station

normuli, iq sadac vawvdiT marcxena da marjvena saguSagoebs

simaRlebiTurT, romlebic blokaven dinebas marcxena seqciis marcxena

saguSagosken da marjvena seqciis marjvena saguSagosken.

2. Blocked where you can have multiple (up to 10) blocked flow areas

within the X-section

dablokili – sadac SesaZlebelia gvqondes ramodenime (10mde)

dablokili dinebis are X seqciis farglebSi.

BlockedIneffective Flowsdablokili araefeqturi dineba

NormalIneffective Flowsnormuli araefeqturi dineba

Once water surface goes above the established elevations, then that specific area is no longer considered ineffective.

mas mere rac, wylis zedapiri ascdeba gansazRvrul simales,es specifikuri are aRar ganisazRvreba, rogorc araefeqturi are

Once water surface goes above the established elevations of the block, then that specific area is no longer considered ineffective.

mas mere rac, wylis zedapiri ascdeba gansazRvrul blokebis simaRles,es specifikuri are aRar ganisazRvreba, rogorc araefeqturi

Option is from x-section window...

parametri gamoCndeba X seqciis fanjaraSi . . .

which brings up this window:

Sedegad gamoCndeba


The plotted x-section looks like this:

gamosaxuli X seqcia gamoiyureba Semdegnairad:


Think of them as dead storage zonesCavTvaloT mkvdar akumulaciis zonad

Ineffective Flow Areasaraefeqturi dinebis zona

Blocked Obstructionsdablokili dabrkoleba

Used to define areas that will be permanently blocked out.

gamoiyeneba gansazRvruli arealisTvis, romelic iqnebian mudmivad dablokili

Decreases flow area and increases wetted perimeter when the water comes in contact with it.

amcirebs wylis gadinebas da amaRlebs dasvelebis perimetrs, rodesac wyali Semodis

kontaqtSi.

Two types of blocked obstructions are available - Normal and Multiple. They are very similar to

the Ineffective Flow areas, except that the blocked areas are never available as water flow

areas.

ori saxis dablokili dabrkoleba aris xelmisawvdomi – saSualo da mravalricxovani. isini

arian msgavsi araefeqturi dinebis zonis, gansxvavdebian imiT, rom dablokili zona

arasodes ganixileba rogorc wylis dinebis zona.

Water can get to the off-sides of these obstructions.

wyals SeuZlia gaaRwios am dabrkolebis gareTac.

MultipleBlockedObstructionsramodenime dablokili dabrkoleba

NormalBlockedObstructionnormuli dablokili dabrkoleba

the blocked areas are never available as water flow areas.dablokili zonebi ar ganixileba, wylis dinebis zonebad

the blocked areas are never available as water flow areas.dablokili zona arasodes ganixileba rogorc wylis dinebis zina


Pparametri aris X seqciis fanjaraSi

which brings up this window:

rac gamaoCens Semdeg fanjaras


The plotted x-section looks like this:daxazuli X seqcia gamoiyureba Semdegnairad:


Leveesjebirebi

No water can get outside of a levee until it is overtopped.

wyali ar gadis jebirebs gareT, manam ar moxdeba datborva

Simulated by a vertical wall.

simulacia xdeba vertikaluri kedlis gamoyenebiT

Additional wetted perimeter is included when water comes in

contact with the levee wall

damatebiTi sveli perimetri daemateba maSin, rodesac wyali

Sedis kontaqtSi jebirebis kedlebTan

Leveesjebirebi


parametri aris X seqciis fanjaraSi...which brings up this window:

ris Sedegadac Cndeba fanjara:

Leveesjebirebi

The plotted x-section looks like this:

gamosaxuli X seqcia gamoiyureba Semdegnairad

Levees jebirebi

ITC Faculty of Geo-Information Science and Earth Observation of the University of Twente 52

Levees vs. Ineffective Flow Areasjebirebi da araefeqturi dinebis are

Are conceptually similar but very different hydraulically

konceptualurad msgavsia magram mniSvnelovnad gansxvavdebian erTmaneTisgan hidravlikuri

TvalsazrisiT.

Ineffective flow areas is used where water is present to the left/right of the ineffective station but the

velocity is zero. Volume included in storage and wetted perimeter calculations but not in conveyance.

(think: ponded area)

araefeqturi dinebis are gamoiyeneba iq, sadac wyali fizikurad warmodgenilia araefeqturi

dinebis sadguris marcxena an marjvena mxares, magram misi dinebis siCqare nulia. am wylis

masis moculoba Sedis gadaTvlebSi, magram ar xdeba misi gaTvaliswineba wylis gadazidvaSi

(moiazreT: dagubebuli adgili).

A levee acts as a vertical wall. No water occupied the space to the left/right of the levee unless the levee

elevation is exceeded. The distance that the levee is in contact with the water is included in the wetted

perimeter calculations. (think: wall)

jebirebi ganixileba, rogorc vertikaluri kedeli. marcxena da marjvena jebirebis nawilebSi wyali

ar aRwevs sanam ar daiwyeba datborvis procesi. is monakveTi, romelic Sedis wyalTan

kontaqtSi, emateba sveli perimetris gaTvlebs (moiazreT: kedeli)

After entering geometry data, it is wise to save it. Recommend doing this often as you enter data.

geometriuli monacemebis Seyvanis Semdeg mizanSewonilia maTi Senaxva. rekomendirebulia SevinaxoT monacemebi Seyvanis paralelurad.

Entering Cross Section Dataganivi kveTebis seqciebis monacemebis Setana

Flow Datadinebis monacemebi

Enter the Steady Flow Data Editor from the main menu

daamateT mtkice dinebis monacemebis redaqtori ZiriTadi meniudan

Or, you can select the Steady Flow Data button:an SesaZlebelia SearCioT mtkice dinebis monacemTa Rilaki

Enter Flow Data dinebis monacemebis Seyvana

Enter Flow Data dinebis monacemebis Seyvana This brings up the Steady Flow Data Window.

Sedegad gamoCndeba mtkice dinebis monacemTa fanjara

You can have up to 100 profiles. SesaZlebelia gvqondes 100-mde profili

One profile corresponds to one possible flow input configuration for the system. River geometry does not change for different profiles.

erTi profili ukavSirdeba erT Setanil, SesaZlebel dinebis monacemebs garkveuli mdinaris sistemisTvis. mdinaris geometria ar icvleba sxvadasxva profilisTvis

I.e it brought up 3 boxes when 3 profiles are specified. magaliTad gamoaqvs 3 ujredi rodesac aris gansazRvruli 3 profili


Enter the input discharges for each profile in appropriate box. SeiyvaneT xarjis monacemebi profilis yovel Sesamabis velSi. Each river and branch require one the same number of profiles. yoveli mdinare Tu Senakadi moiTxovs profilebis erTi da igive raodenobas In the example, you enter 3 profiles, then 3 boxes appear. For the river “Test” in the

Reach “Main” the 3 input discharges are entered in the profiles. nimuSSi, Tqven SeiyvaneT 3 profili, gamoCndeba 3 ujredi. profilSi, “test” mdinaris

“ZiriTad” SenakadSi 3 xarjis miTiTebaa saWiro

User can add flow changes at a certain station along one certain reach. momxmarebels SeuZlia daamatos dinebis cvlileba garkveul saguSagoze garkveuli Senakadis gaswvriv. Select River Station SearCieT mdinaris saguSago Click “Add a Flow Change Location”, and select the station and enter the added flow to the reach. daaWireT “daamateT dinebis Secvlis adgilmdebareoba” da SearCieT saguSago da daamateT dineba

gawvdomisken. NOTE: Normally the flow input will be required at least in the most upstream section of each river branch

(program default). SeniSvna: rogorc wesi dinebis monacemebis Seyvana savaldebulo iqneba yoveli mdinaris Senakadis

yvelaze zeda seqciisTvis (programis winapiroba).


Set the boundary conditions by selecting “Reach Boundary Conditions” daakompleqteT sasazRvro pirobebi “gawvdomis sasazRvro pirobebis” “Reach

Boundary Conditions“ Rilakis SerCeviT This brings up Steady Flow Boundary Conditions window. You can set the boundary for all

profiles at once, or separately. es moqmedeba gamoaCens damyarebuli dinebis sasazRvro pirobebis fanjaras.

saWiroa dakompleqtdes sasazRvro pirobebi yvela profilisTvis erTianad an cal-calke.

Enter Flow Data: Boundary Conditions dinebis monacemebis Seyvana: sasazRvro pirobebi

There are 4 different methods for specifying the starting water surface at the boundaries in steady flow: arsebobs oTxi gansxvavebuli meTodi raTa zustad ganvsazRvroT wylis sawyisi zedapiri

sazRvarze, damyarebuli dinebisTvis. known elevation: When the elevation of the water is fixed (big lakes or sea) cnobili simaRle: rodesac wylis simaRle dafiqsirebulia (didi tba an zRva) critical depth: up and downstream of a critical section, the river branch is hydraulically separated and independent, kritikuli siRrme: kritikuli seqciis zeda an qvedadineba, mdinaris Senakadi hidrologiurad gamoyofilia da

damoukidebelia. normal depth: The slope of the water surface is known. saSualo siRrme: wylis zedapiris daxra cnobilia rating curve: The rating curve at the boundary is known, xarjis mrudi: xarjis mrudi sazRvarze cnobilia


After selecting either the upstream or downstream data box and then selecting method for providing starting conditions, a window appears for entering your data.

mas Semdeg rac SerCeulia an zedadinebis an qvedadinebis monacemebis ujredi, Semdeg ki meTodi raTa vuzrunvelyoT sawyisi pirobebi, gamoCndeba fanjara monacemTa Sesatanad.

Boundary conditions are entered: sasazRvro pirobebi Seitaneba:

downstream end for sub-critical flow qvedadinebis bolos, subkritikuli dinebisTvis upstream end for super-critical zedadinebis bolos, superkritikuli both for mixed (when in the reach there are both sub- and super-critical sections) orive Sereuli tipisTvis (rodesac gawvdomaSi Sedis orive, sub da superkritikuli dineba)


There are several options available in the “Options” window of the Steady Flow Data window such as changing profile names, applying a ratio to all flows, etc.

stabiluri dinebis monacemTa fanjaraSi ramodenime parametria xelmisawvdomi, iseTi rogoricaa profilis saxelis Secvla, Tanafardobis damateba yvela dinebisTvis d.a.S.

Make a consultation of the manual for details. detalebSi gasrkvevad mimarTeT damxmare saxelmZRvanelos


Under “Options”, select “Observed WS” “Options” is qveviT SearCieT danakvirvebi wylis zedapiri

“Observed WS” A menu appears. Select River Station gamoCndeba meniu. SearCieT mdinaris sadguri Select “Add an Obs WS Location” SearCieT “daamateT danakvirvebi wylis zedapiris

adgilmdebareoba “Add an Obs WS Location” Enter observed elevation. SeiyvaneT danakvirvebi simaRle The observation of the water elevation must be in accordance

with the profile wylis donis danakvirvebi sidide unda Seesabamebodes

profils.

Enter Flow Data - Observed Water Surfacesdinebis monacemebis Seyvana – danakvirvebi wylis zedapiri

Enter Flow Data - Observed Water Surfacesdinebis monacemebis Seyvana – danakvirvebi wylis zedapiri

Where do you get observed data?

sad movipovoT danakvirvebi monacemebi?

Use calibration data - survey debris lines, mud marks,

gage data, etc

gamoiyeneT dakalibrebuli monacemebi –

Semowmebuli CamonaSalis grafiki, talaxis

niSnuli, gazomili monacemebi da sxva.

After entering your flow data, it is suggested you save it to a file. mas mere, rac moxda monacemebis Seyvana,

mizanSewonilia moxdes failis Senaxva


Save Projectproeqtis Senaxva After entering and saving the geometry

and flow data, it is suggested that you

save your project from the main HEC-

RAS File Menu.

geometriuli da dinebis

monacemebis Seyvanis da Senaxvis

Semdeg, mizanSewonilia proeqtis

Senaxva HEC-RAS-is ZiriTadi menius

gamoyenebiT

Saving is not automatic in HECRAS.

HECRAS –Si Senaxva araa avtomaturi

RED NUMBERS while entering data mean

that the data is not saved yet!!

wiTeli ricxvebi nuSnavs:

miuxedavad imisa, rom

monacemebi Seyvanilia,

monacemebi araa Senaxuli

Perform the Hydraulic Computations

hidravlikuri gadaTvlebis Sesruleba

Enter the Steady Flow Analysis window from the main menuSediT mdgradi dinebis analizis fanjaris ZiriTad meniuSi

or select the Steady Flow Analysis button:

an SearCieT mdgradi dinebis analizis Rilaki

Perform the Hydraulic Computationshidravlikuri gadaTvlebis Sesruleba


In the window: you can set flow regime, select geometry and/or flow files, and start the computations. fanjaraSi SesaZlebelia SevarCioT dinebis reJimi, geometria an/da dinebis failebi da daviwyoT gaTvlebi The user must select the adequate subcritical, supercritical or mixed options depending on the river regime. momxmarebelma unda SearCios adekvaturi subkritikuli, superkritikuli an Sereuli dinebis maxasiaTebeli

mdinaris reJimis mixedviT. A mistake in the river regime selection can be corrected after understanding the warnings & graphical output Secdomebi reJimis SerCevaSi SeiZleba iyos Sesworebuli gamafrTxilebeli Setyobinebebis gaazrebis da

grafikuli Sedegebis safuZvelze ALWAYS SAVE: Under “File”, select “Save Plan As…” yovelTvis SeinaxeT: filis meniuSi SearCieT “Seinaxe rogorc.” “save as” Create a project title. SeqmeniT proeqtis faili

it brings up a window allowing you to enter a short plan identifier, used in printouts and reports.

es amogigdebT fanjaras, romelic saSualebas iZleva, SevitanoT mokle gegmis identifikatori, romelic gamoiyeneba amobeWdvisas da angariSebisTvis.


There are several options available for the hydraulic computations hidravlikuri gaTvlebis Casatareblad ramodenime parametria

xelmisawvdomi User must refer to the manual for details momxmarebelma unda mimarTos damxmare saxelmZRvanelos detalebisTvis


After selecting the compute button, HECRAS does it’s magic.

gadaTvlis Rilakze daWeris Semdeg, HECRAS-i iwyebs Tavis jadoqrobas

Simulation creates files of considerable size. simulaciisas iqmneba didi zomis failebi

Viewing the OutputSedegebis mimoxilva

View the OutputSedegebis mimoxilva Many output formats to view within the view menu: ZiriTadi menius daxmarebiT SesaZlebelia Sedegebis naxva sxvadasxva

formatSi: plotted cross-sections, gamoxazuli ganivi kveTebi profiles, profilebi rating curves xarjis perioduli mrudi 3-D views 3-D ganzomilebiani xedva cross-section ganivi kveTebi profile tabular data profilebis cxrilovani monacemebi Others sxva

View the OutputSedegebis mimoxilva

View Cross-Sections daaTvaliereT ganivi kveTebi

Or, you can select the appropriate button: an SegiZliaT SearCioT Sesabamisi Rilaki


Plot Profiles gamosaxeT profili

See observed water surface profiles when you plot the profile daaTvaliereT gazomili wylis zedapiris profili misi gamoxazvis dros You can plot many profiles at the same time. SesaZlebelia ramodenime profilis erTdroulad gamoxazva Zoom and Pan possibilities for details. gaadideT da gadaadgileT naxazi detalebis Sesaswavlad



Plot profiles of different data sxvadasxva monacemebis profilebis ageba


Plot Rating Curves for a specified station daxazeT xarjis perioduli mrudi gansazRvruli

sadgurisTvis

- Plot 3-D View

- daxazeT 3-D sqema

Note:

Cross-section widths should be consistent for better presentation.

SeniSvna:

ganivi kveTebis sigane unda iyos Tavsebadi erTmaneTTan, raTa ukeTesiad moxdes naxazis ageba



View Cross-Section Table daaTvaliereT ganivi-kveTis

cxrili Several geometric, energetic and

hydraulic information is available per cross section.

yoveli seqciisTvis xelmisawvdomia ramodenime geometriuli, energetikuli da hidravlikuri maCvenebeli.


Under “Options”, select “Define Table” to see more variables

parametrebSi “Options” SearCieT “gansazRvre cxrili” “Define Table”, raTa vixiloT meti cvladi

Output: Errors, Warnings, & NotesSedegebi: Secdoma, gafrTxileba da SeniSvnebi

Errors: problems that prevents the program from running. The user must change something.

Secdoma : problemebi, romlebic xelisSemSlelia programisTvis da aferxebs mis

gaSvebas. momxmarebelma unda Secvalos raRac maCveneblebi.

Warnings: does not prevent the program from running but the user should examine and review.

The user may want to change some input.

gafrTxileba: ar aferxebs programis gaSvebas, magram momxmarebelma unda

gadaamowmos da gadaxedos monacemebs da parametrebs.

Notes: provides information about how the program is performing the calculations, user should

review.

SeniSvna: uzrunvelyofs informacias imis Sesaxeb, Tu rogor xdeba gaTvlebis

Sesruleba, momxmarebelma unda gadaxedos proeqts.

You can select “Generate Report …” from

the HEC-RAS main menu.

SesaZlebelia SevarCioT “zogadi

angariSi” HEC-RAS–is mTavari meniudan

There are several options available for the

report content. The report generated can be

viewed or the resulting file printed.

angariSSi warmodgenili monacemebis

SesarCevad ramodenime parametria

xelmisawvdomi. warmodgenili angariSi

SeiZleba vnaxoT monitorze an

amovbeWdoT.

Generate ReportsangariSis warmoeba

Sample view of the report:angariSis magaliTi:

Hydraulic Model Accuracyhidravlikuri modelis sizuste

Absolute accuracy: how good is your data? +/- 0.5 foot absoliuturi sizuste: ramdenad kargia monacemTa

baza? +/- 0.5 futi Relative accuracy: very good

(compare one condition to another) fardobiTi sizuste: Zalian kargi (SevadaroT erTi mdgomareoba meoresTan)

HECRAS Basis Input HECRAS – sawyisi monacemebi

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Transcript of HECRAS Basis Input HECRAS – sawyisi monacemebi