Post on 17-Jan-2016
description
Missouri Nutrient Criteria Development
Mark Osborn
Lakes & Reservoirs
• Natural Lakes (very few)
– Sinkhole ponds (in karst areas)
– Ox-bow lakes, blew holes, wetland lakes
– 1 tectonic
• Artificial Lakes and Reservoirs
– ~2900 > 5 ac in area
– 22 > 1000 ac in area
• 456 listed as Waters of the State
History of Reservoir Construction in Missouri
(reservoirs > 10 acres in surface area)• Year Completed No. of reservoirs Percentage
1800 – 1920 122 81920 – 1940 267 181940 – 1960 68 51960 – 1980 909 611980 – 1995 121 8
Lake Regions in Missouri
Big RiversOzarksPlains
Lake Regions
N
EW
S
0 60 120 Miles
(12)
(53)
(82)
Range of Total Phosphorus samples in lake regions
29
87
117
2
3145
163
19
698
192
1343
75
276
33
1
10
100
1000
10000
Plains Big Rivers Ozarks
To
tal P
ho
sp
ho
rus
(u
g/L
)
n = 3120 n = 290 n = 1968
Log distribution of Total Phosphorus in Lake Regions
0
100
200
300
400
500
600
700
800
900
Fre
qu
en
cy
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2log [TP (ug/L)]
Ozarks
Plains
Big Rivers
Log distribution for Total Nitrogen in Lake Regions
0
100
200
300
400
500
600
700
Fre
qu
en
cy
1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9log [TN (ug/L)]
Ozarks
Plains
Big Rivers
Log distribution for chlorophyll-a in lake regions
0
100
200
300
400
500
600
700
Fre
qu
en
cy
-0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3log [chl-a (ug/L)]
Ozark
Plains
Big Rivers
Log distribution for Secchi depth in lake regions
0
100
200
300
400
500
600
700
Fre
qu
en
cy
-1.1 -1 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1log [Secchi depth (m)]
Ozarks
Plains
Big Rivers
Median chlorophyll-a response to median total phosphorus
Big Riversy = 0.8765x - 0.2245
R2 = 0.646
Plainsy = 0.9433x - 0.362
R2 = 0.6646
Ozarksy = 1.3517x - 0.9536
R2 = 0.8532
0
0.5
1
1.5
2
2.5
0 0.5 1 1.5 2 2.5 3
log TP (ug/L)
log
Ch
loro
ph
yll-a
(u
g/L
)
Big Rivers Plains Ozarks Linear (Big Rivers) Linear (Plains) Linear (Ozarks)
Potential TP criteria based on chlorophyll-a response(ug/L)
Chl-a (25th percentile)
TP Chl-a (median)
TP
Plains 8.2 22.5 15.4 43.9
Big Rivers 24.8 70.3 42.7 130.7
Ozarks
2.8 10.9 6.3 19.8
Other factors to consider
• Designated Uses
• Area, Depth, and Volume
• Watershed size and characteristics
• Residence time
Residence Time
Volume 100
outflow 100
outflow 200
inflow 100
inflow 50
inflow 200
outflow 50
Volume 100
Volume 100
RT = 2 years
RT = 1 years
RT = .5 years
Lake Nutrient Criteria = f [lake region, designated uses,watershed, lake dimensions,residence time]
Streams
Rule making procedures
Program Determines need for Rulemaking; Submits
"Request for Approval to Begin Rulemaking"
with Rulemaking Report to
Division
Program develops Regulatory Impact Report (RIR) and draft Rulemaking through research and outside input.
Program requests interagency review and RIR public notice
Division then OD Reviews;
OK to Release?
AGO reviews draft PRM for content and signs
takings analysis memo to DNR Director
Division Director Reviews;
required to alert DNR Director;
Approves?
> Program places 60 day RIR notice in newspaper
and on web page. > OD e-mails draft RM to interagency coord. team
not later than 35 days prior to filing date.
Program responds to comments on the web.
Board or commission makes Finding of Necessity
Program assembles the PRM package to meet 536 RSMo
and other requirements
Division Counsel reviews for
legal authority and concerns.
Forwards?
PRM Folder to Division Director for review and approval.
Approves?
PRM to General Counsel and
DNR Director for Approval & Signature(Need >= 20 day lead before ORM file date)
Approves and Signs?
Program Delivers Signed PRM w/RIR to SoS, and JCAR. OA gets PRM. If required, SBRFB gets
PRM and SBIS
Assuming no problems with JCAR, PRM is published in MoReg and PRM public
participation begins. - Go to Flowchart App J3 -
Program revises PRM as
necessary or
withdraws.
YES
NO
YES
YES
NO
NO
Rulemaking w/ RIR Up To PRM Filing
YES
NO
YES
NO
Public Hearing held (if required) no sooner
than 30 days after PRM published.
Public Comment Period Ends. Program has 90
days to file the ORM with the SoS
Program develops responses in
consultation with stakeholders as
necessary and makes revisions as required.
Were there Comments requiring a
response?
Commission or Board votes on
disposition of ORM.Adopts?
Program files a Final Order for Withdrawal of the proposal with the
SoS
Program assembles the ORM package to meet 536 RSMo and other
requirements and submits to Division
Division Reviews ORM package
All there?
Division submits ORM to DNR Director and General Counsel for
Signature. ORM package returned to program.
Program Delivers Signed ORM to JCAR 30 or more days prior to
filing with the SoS and OA.
ORM published in MoReg, then completed rule published 15-30 days later in CSR. Effective 30 days after CSR publication
Program revises package as necessary
YES
NO
YES
NO
Rulemaking After Public Participation
(for programs with a rulemakingboard or commission)
NO
YES
Questions?