bacteria tmdls for greens bayou...2008/11/06 · greens bayou e. coli longitudinal profile greens...
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![Page 1: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/1.jpg)
Bacteria Bacteria TMDLs forTMDLs for
Greens Greens BayouBayou
November 6, 2008November 6, 2008
PARSONSPARSONS
![Page 2: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/2.jpg)
OutlineOutlineWatershed OverviewWatershed Overview
Pollutant Source AssessmentPollutant Source Assessment
Technical Approach: Load Technical Approach: Load Duration CurvesDuration Curves
TMDL CalculationsTMDL Calculations
![Page 3: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/3.jpg)
Greens Bayou WatershedGreens Bayou Watershed
~140 square ~140 square milesmiles
Located within Located within 2 counties 2 counties (Houston and (Houston and Humble)Humble)
Average Average Annual Rainfall Annual Rainfall 48.8 inches48.8 inches(NOAA 2007)(NOAA 2007)
![Page 4: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/4.jpg)
Land Use/Land CoverLand Use/Land Cover
![Page 5: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/5.jpg)
303 (d) Listed Assessment Units (2008)303 (d) Listed Assessment Units (2008)
Entire StreamUnnamed Tributary of Greens Bayou1016D_01
Entire StreamUnnamed Tributary of Greens Bayou1016C_01
Entire StreamUnnamed Tributary of Greens Bayou1016B_01
From Williams Gully confluence to confluence with Greens BayouGarners Bayou1016A_02
1016A_03
US 59 to upstream Halls Bayou confluence
IH 45 to US 59Greens Bayou Above
Tidal
1016_01 1016_02 1016_03
Description of Assessment Unit Not Supporting Contact Recreation UseWater BodySegment
![Page 6: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/6.jpg)
Water Quality StationsWater Quality Stations
![Page 7: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/7.jpg)
E. coliE. coli Data for TCEQ Stations Data for TCEQ Stations from 1996 to 2006from 1996 to 2006
* Geometric Mean Criteria for E. coli is 126 MPN/100mL and Single Sample Criteria is 394 MPN/100mL
83%67832090166761016D_01
90%73811318111241016C_01
50%918568200241016B_01
58%3459729111251016A_03
45%4088406113691016_03
72%5779990113711016_02
% of Samples
Exceeding
Number of Samples
Exceeding Single Sample Criteria
Number of Samples
Geometric Mean
Concentration
Station IDSegment
![Page 8: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/8.jpg)
Greens Bayou Greens Bayou E. coliE. coli GeomeansGeomeans
![Page 9: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/9.jpg)
Greens Bayou Greens Bayou E. coliE. coliLongitudinal ProfileLongitudinal Profile
Greens Bayou
1.0E+00
1.0E+01
1.0E+02
1.0E+03
1.0E+04
1.0E+05
1.0E+06
0510152025303540
River Km
E. c
oli (
MPN
/100
mL)
Geometric standard: 126 MPN/100 mL
0 km is at confluence with Segment 1006Solid symbol indicates tributary location
1136
9
1137
6
1137
0
1112
5
1112
4
1667
6
1136
9
1377
8
1749
5
2002
4
Legend
Maximum
Geometric mean
Minimum
![Page 10: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/10.jpg)
OutlineOutlineWatershed OverviewWatershed Overview
Pollutant Source AssessmentPollutant Source Assessment
Technical Approach: Load Technical Approach: Load Duration CurvesDuration Curves
TMDL CalculationsTMDL Calculations
![Page 11: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/11.jpg)
Wastewater Treatment PlantsWastewater Treatment Plants
![Page 12: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/12.jpg)
Summary of TPDESSummary of TPDES--Permitted Permitted Facilities in the Study AreaFacilities in the Study Area
2.15.691016D
0.30.471016C
7.326.2151016A
17.159.0621016
Total Average Monthly Flow
(MGD)
Total Permitted Flow (MGD)
Number of
Facilities
Assessment Unit
![Page 13: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/13.jpg)
Sanitary Sewer OverflowsSanitary Sewer Overflows
![Page 14: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/14.jpg)
Permitted StormwaterPermitted StormwaterFor WQ0004685000For WQ0004685000
85%3,0083,556Unnamed Tributary of Greens Bayou1016D
100%4,0434,043Unnamed Tributary of Greens Bayou1016C
87%2,3442,698Unnamed Tributary of Greens Bayou1016B
87%18,92021,697Garners Bayou1016A_02 1016A_03
79%46,13958,404Greens Bayou Above Tidal
1016_01 1016_02 1016_03
Percent under MS4
Permit
Area under MS4 Permit
(Acres)
Total Area (acres)Stream NameSegment
![Page 15: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/15.jpg)
Population ProjectionsPopulation Projections
Source: HGAC 2007
60%11,437 4,556 1016D_01
26%28,288 20,839 1016C_01
30%10,860 7,626 1016B_01Unnamed Tributary of Greens Bayou
54%6,614 3,048 1016A_03
63%54,531 20,226 1016A_02Garners Bayou
52%56,546 27,189 1016_03
45%87,338 48,239 1016_02
21%156,222 122,837 1016_01Greens Bayou Above Tidal
Increase20352005Assessment Unit
Stream Name
![Page 16: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/16.jpg)
OnOn--Site Sewage FacilitiesSite Sewage Facilities
![Page 17: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/17.jpg)
OnOn--Site Sewage FacilitiesSite Sewage Facilities
2Unnamed Tributary of Greens Bayou1016D
1,027Unnamed Tributary of Greens Bayou1016C
26Unnamed Tributary of Greens Bayou1016B
128Garners Bayou1016A_02 1016A_03
1,710Greens Bayou Above Tidal1016_01 1016_02 1016_03
OSSF Estimate using 1990 Census
MethodStream NameAssessment
Unit
![Page 18: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/18.jpg)
Estimated Number of PetsEstimated Number of Pets
4,4553,915Unnamed Tributary of Greens Bayou1016D
3,9013,428Unnamed Tributary of Greens Bayou1016C
4,0003,515Unnamed Tributary of Greens Bayou1016B
11,2379,875Garners Bayou1016A_02 1016A_03
33,22457,283Greens Bayou Above Tidal
1016_01 1016_02 1016_03
CatsDogsStream NameSegment
![Page 19: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/19.jpg)
OutlineOutlineWatershed OverviewWatershed Overview
Pollutant Source AssessmentPollutant Source Assessment
Technical Approach: Load Duration Technical Approach: Load Duration CurvesCurves
TMDL CalculationsTMDL Calculations
![Page 20: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/20.jpg)
WQM Stations Targeted for TMDL WQM Stations Targeted for TMDL DevelopmentDevelopment
![Page 21: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/21.jpg)
USGS Gages in the USGS Gages in the Greens Bayou WatershedGreens Bayou Watershed
* Highlight - USGS gage station used to project flows.
Gage Height (ft)2/13/1998 -Present
Discharge (cfs)2/25/1986 - PresentGarners Bayou near
Humble, TX8076180
Gage Height (ft)9/28/1952 - Present
Discharge (cfs)10/1/1952 - PresentGreens Bayou at US 59 North of Houston8076000
Gage Height (ft)4/17/1997 - Present
Discharge (cfs)8/3/1965 - PresentGreens Bayou at US HWY 758075900
Gage Height (ft)12/6/2003 - PresentGreens Bayou at Cutter Rd8075780
Data TypePeriod of RecordNameUSGS Gage
Number
![Page 22: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/22.jpg)
Flow PercentilesFlow Percentiles
0.80008.03020100
2.01.2010.3452890
2.41.60.2211503280
2.72.00.2912533570
2.92.50.3813573860
3.33.20.4914614350
3.74.20.6616685040
4.06.00.9719836430
4.8111.862512310320
7.4304.875525923710
4423,1065099,40022,47422,3000Q (cfs)Q (cfs)Q (cfs)Q (cfs)Q (cfs)Q (cfs)Percentile
48.751.853.547.750.149.9Average Annual Rainfall (inch)
5.66.34.233.8141.267.9Watershed Area (sq. mile)
1016D_011016C_011016B_011016A_02 1016A_031016 _031016_01
1016_02Assessment Unit
![Page 23: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/23.jpg)
LDC SchematicLDC Schematic
![Page 24: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/24.jpg)
Load Duration Curve for Greens Bayou Above Load Duration Curve for Greens Bayou Above Tidal (1016_01, 1016_02)Tidal (1016_01, 1016_02)
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
1.E+07
0 10 20 30 40 50 60 70 80 90 100
Flow Exceedance Percentile
Esc
heric
hia
coli
Dai
ly L
oad
(109 /d
ay)
Load at Single Sample WQ CriterionLoad at Single Sample WQ TargetEC ObservationsWWTP Wasteload AllocationWet Weather Influenced EC ObservationsExisting Geomean Load
![Page 25: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/25.jpg)
Load Duration Curve for Greens Bayou Above Load Duration Curve for Greens Bayou Above Tidal (1016_03)Tidal (1016_03)
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
1.E+07
0 10 20 30 40 50 60 70 80 90 100
Flow Exceedance Percentile
Esc
heric
hia
coli
Dai
ly L
oad
(109 /d
ay)
Load at Single Sample WQ CriterionLoad at Single Sample WQ TargetEC ObservationsWWTP Wasteload AllocationWet Weather Influenced EC ObservationsExisting Geomean Load
![Page 26: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/26.jpg)
Load Duration Curve for Garners Bayou Load Duration Curve for Garners Bayou (1016A_02, 1016A_03)(1016A_02, 1016A_03)
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
1.E+07
0 10 20 30 40 50 60 70 80 90 100
Flow Exceedance Percentile
Esc
heric
hia
coli
Dai
ly L
oad
(109 /d
ay)
Load at Single Sample WQ CriterionLoad at Single Sample WQ TargetEC ObservationsWWTP Wasteload AllocationWet Weather Influenced EC ObservationsExisting Geomean Load
![Page 27: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/27.jpg)
Load Duration Curve for Unnamed Tributary of Load Duration Curve for Unnamed Tributary of Greens Bayou (1016B_01)Greens Bayou (1016B_01)
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 10 20 30 40 50 60 70 80 90 100
Flow Exceedance Percentile
Esc
heric
hia
coli
Dai
ly L
oad
(109 /d
ay)
Load at Single Sample WQ CriterionLoad at Single Sample WQ TargetEC ObservationsWWTP Wasteload AllocationWet Weather Influenced EC ObservationsExisting Geomean Load
![Page 28: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/28.jpg)
Load Duration Curve for Unnamed Tributary of Load Duration Curve for Unnamed Tributary of Greens Bayou (1016C_01)Greens Bayou (1016C_01)
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 10 20 30 40 50 60 70 80 90 100
Flow Exceedance Percentile
Esc
heric
hia
coli
Dai
ly L
oad
(109 /d
ay)
Load at Single Sample WQ CriterionLoad at Single Sample WQ TargetEC ObservationsWWTP Wasteload AllocationWet Weather Influenced EC ObservationsExisting Geomean Load
![Page 29: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/29.jpg)
Load Duration Curve for Unnamed Load Duration Curve for Unnamed Tributary of Greens Bayou (1016D_01)Tributary of Greens Bayou (1016D_01)
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
0 10 20 30 40 50 60 70 80 90 100
Flow Exceedance Percentile
Esc
heric
hia
coli
Dai
ly L
oad
(109 /d
ay)
Load at Single Sample WQ CriterionLoad at Single Sample WQ TargetEC ObservationsWWTP Wasteload AllocationWet Weather Influenced EC ObservationsExisting Geomean Load
![Page 30: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/30.jpg)
OutlineOutlineWatershed OverviewWatershed Overview
Pollutant Source AssessmentPollutant Source Assessment
Technical Approach: Load Technical Approach: Load Duration CurvesDuration Curves
TMDL CalculationsTMDL Calculations
![Page 31: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/31.jpg)
TMDL CalculationsTMDL Calculations
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 10 20 30 40 50 60 70 80 90 100Flow Exceedance Percentile
E. C
oli
Dai
ly L
oad
(109 /d
ay)
TMDL =TMDL =
![Page 32: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/32.jpg)
TMDL CalculationsTMDL Calculations
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 10 20 30 40 50 60 70 80 90 100Flow Exceedance Percentile
E. C
oli
Dai
ly L
oad
(109 /d
ay)
TMDL =TMDL =
Margin of Safety (TMDL x 0.05)Margin of Safety (TMDL x 0.05)
![Page 33: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/33.jpg)
TMDL CalculationsTMDL Calculations
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 10 20 30 40 50 60 70 80 90 100Flow Exceedance Percentile
E. C
oli
Dai
ly L
oad
(109 /d
ay)
TMDL =TMDL =
WLAWLAWWTFWWTF = (Permitted Flow X 126 MPN/100mL X = (Permitted Flow X 126 MPN/100mL X Conversion Factor)Conversion Factor)
Margin of Safety (TMDL x 0.05)Margin of Safety (TMDL x 0.05)
![Page 34: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/34.jpg)
TMDL CalculationsTMDL Calculations
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 10 20 30 40 50 60 70 80 90 100Flow Exceedance Percentile
E. C
oli
Dai
ly L
oad
(109 /d
ay)
TMDL =TMDL =WLAWLASTORMWATER = STORMWATER = (TMDL(TMDL--MOSMOS--WLAWLAWWTFWWTF) X % ) X % of drainage area covered by storm water of drainage area covered by storm water permitspermits
WLAWLAWWTFWWTF = (Permitted Flow X 126 MPN/100mL X = (Permitted Flow X 126 MPN/100mL X Conversion Factor)Conversion Factor)
Margin of Safety (TMDL x 0.05)Margin of Safety (TMDL x 0.05)
![Page 35: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/35.jpg)
TMDL CalculationsTMDL Calculations
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 10 20 30 40 50 60 70 80 90 100Flow Exceedance Percentile
E. C
oli
Dai
ly L
oad
(109 /d
ay)
TMDL =TMDL =
LA=TMDL LA=TMDL –– MOSMOSWWTFWWTF -- WLAWLASTORMWATERSTORMWATER
WLAWLASTORMWATER = STORMWATER = (TMDL(TMDL--MOSMOS--WLAWLAWWTFWWTF) X % ) X % of drainage area covered by storm water of drainage area covered by storm water permitspermits
WLAWLAWWTFWWTF = (Permitted Flow X 126 MPN/100mL X = (Permitted Flow X 126 MPN/100mL X Conversion Factor)Conversion Factor)
Margin of Safety (TMDL x 0.05)Margin of Safety (TMDL x 0.05)
![Page 36: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/36.jpg)
TMDL CalculationsTMDL Calculations
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 10 20 30 40 50 60 70 80 90 100Flow Exceedance Percentile
E. C
oli
Dai
ly L
oad
(109 /d
ay)
TMDL =TMDL =
LA=TMDL LA=TMDL –– MOSMOSWWTFWWTF -- WLAWLASTORMWATERSTORMWATER
WLAWLASTORMWATER = STORMWATER = (TMDL(TMDL--MOSMOS--WLAWLAWWTFWWTF) X % ) X % of drainage area covered by storm water of drainage area covered by storm water permitspermits
WLAWLAWWTFWWTF = (Permitted Flow X 126 MPN/100mL X = (Permitted Flow X 126 MPN/100mL X Conversion Factor)Conversion Factor)
Margin of Safety (TMDL x 0.05)Margin of Safety (TMDL x 0.05)
Future Growth
![Page 37: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/37.jpg)
TMDL CalculationsTMDL Calculations
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 10 20 30 40 50 60 70 80 90 100Flow Exceedance Percentile
E. C
oli
Dai
ly L
oad
(109 /d
ay)
TMDL =TMDL =
LA=TMDL LA=TMDL –– MOSMOSWWTFWWTF -- WLAWLASTORMWATERSTORMWATER
WLAWLASTORMWATER = STORMWATER = (TMDL(TMDL--MOSMOS--WLAWLAWWTFWWTF) X % ) X % of drainage area covered by storm water of drainage area covered by storm water permitspermits
WLAWLAWWTFWWTF = (Permitted Flow X 126 MPN/100mL X = (Permitted Flow X 126 MPN/100mL X Conversion Factor)Conversion Factor)
Margin of Safety (TMDL x 0.05)Margin of Safety (TMDL x 0.05)
Future Growth
![Page 38: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/38.jpg)
TMDL CalculationsTMDL Calculations
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 10 20 30 40 50 60 70 80 90 100Flow Exceedance Percentile
E. C
oli
Dai
ly L
oad
(109 /d
ay)
TMDL =TMDL =
LA=TMDL LA=TMDL –– MOSMOSWWTFWWTF -- WLAWLASTORMWATERSTORMWATER
WLAWLASTORMWATER = STORMWATER = (TMDL(TMDL--MOSMOS--WLAWLAWWTFWWTF) X % ) X % of drainage area covered by storm water of drainage area covered by storm water permitspermits
WLAWLAWWTFWWTF = (Permitted Flow X 126 MPN/100mL X = (Permitted Flow X 126 MPN/100mL X Conversion Factor)Conversion Factor)
Margin of Safety (TMDL x 0.05)Margin of Safety (TMDL x 0.05)
Future Growth
Additional Assimilative CapacityAdditional Assimilative Capacity
![Page 39: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/39.jpg)
TMDL CalculationsTMDL Calculations
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 10 20 30 40 50 60 70 80 90 100Flow Exceedance Percentile
E. C
oli
Dai
ly L
oad
(109 /d
ay)
TMDL =TMDL =
LA=TMDL LA=TMDL –– MOSMOSWWTFWWTF -- WLAWLASTORMWATERSTORMWATER
WLAWLASTORMWATER = STORMWATER = (TMDL(TMDL--MOSMOS--WLAWLAWWTFWWTF) X % ) X % of drainage area covered by storm water of drainage area covered by storm water permitspermits
WLAWLAWWTFWWTF = (Permitted Flow X 126 MPN/100mL X = (Permitted Flow X 126 MPN/100mL X Conversion Factor)Conversion Factor)
Margin of Safety (TMDL x 0.05)Margin of Safety (TMDL x 0.05)
Future Growth
Additional Assimilative CapacityAdditional Assimilative Capacity
Final TMDLFinal TMDL
![Page 40: Bacteria TMDLs for Greens Bayou...2008/11/06 · Greens Bayou E. coli Longitudinal Profile Greens Bayou 1.0E+00 1.0E+01 1.0E+02 1.0E+03 1.0E+04 1.0E+05 1.0E+06 40 35 30 25 20 15 10](https://reader034.vdocument.in/reader034/viewer/2022052612/5f101ed77e708231d4478c16/html5/thumbnails/40.jpg)
Final TMDL AllocationsFinal TMDL Allocations
a WLAWWTF= WLAWWTF+ Future Growthb LA includes upstream loads
2.78E+091.57E+098.63E+092.66E+105.55E+101016D_01
4.70E+0908.70E+101.78E+099.39E+101016C_01
7.51E+081.86E+091.24E+1001.50E+101016B_01
1.58E+101.22E+108.43E+101.29E+113.16E+111016A_03
8.03E+092.75E+096.68E+105.28E+101.61E+111016A_02
7.93E+101.59E+117.23E+114.39E+111.59E+121016_03
4.89E+1006.08E+112.45E+119.79E+111016_02
2.09E+1002.25E+111.31E+114.18E+111016_01
MOS (MPN/day)
LA (MPN/day)
WLAMS4(MPN/day)
WLAWWTFb
(MPN/day)TMDLa
(MPN/day)Assessment Unit