TMDL Modeling Toolbox WAM - Flow and Nutrient Load Modeling Tool for TMDL Development Del Bottcher,...

TMDL Modeling ToolboxTMDL Modeling Toolbox

WAM - Flow and Nutrient Load WAM - Flow and Nutrient Load Modeling Tool for TMDL Modeling Tool for TMDL

Development Development

Del Bottcher, Ph.D., P.E.Del Bottcher, Ph.D., P.E.Barry Jacobson, Ph.D., P.E.Barry Jacobson, Ph.D., P.E.

Soil & Water Engineering Technology, Inc.Soil & Water Engineering Technology, Inc.

Jeff HiscockJeff HiscockJGH EngineeringJGH Engineering

TMDL Modeling Toolbox - WAMTMDL Modeling Toolbox - WAM

WWatershed atershed AAssessment ssessment MModelodelPresentation OutlinePresentation Outline

• What is WAM good for?What is WAM good for?• Conceptual DesignConceptual Design• User InterfaceUser Interface• ImplementationsImplementations• Recent & Future EnhancementsRecent & Future Enhancements


What is it good for?What is it good for?• Help develop pollutant load allocations for TMDLsHelp develop pollutant load allocations for TMDLs• Identify “hot spots”Identify “hot spots”• Rank pollution by sources & sub-basinsRank pollution by sources & sub-basins• Assess growth directions and individual Assess growth directions and individual

development projectsdevelopment projects• Assess abatement strategies (BMPs)Assess abatement strategies (BMPs)• Develop STA and RASTA design parametersDevelop STA and RASTA design parameters• Analyze effectiveness of STAs and RASTAsAnalyze effectiveness of STAs and RASTAs


SimulatesSimulates• Surface and Ground Water Flow Surface and Ground Water Flow

– backflow– multiple inlets / outlets– reaches that dry out

• Water QualityWater Quality– Suspended Solids, Sediment N, Sediment P, Soluble N, Soluble

P, and BOD) - (Bacteria, Toxins)– Chlorophyll-a, dissolved oxygen (using WASP linkage)

• Daily outputs at source cells, subbasins, and individual Daily outputs at source cells, subbasins, and individual stream reachesstream reaches


Suitable for Varied conditionsSuitable for Varied conditions

• Soils handled from hills to flatwoodsSoils handled from hills to flatwoods

• Rural and urban land usesRural and urban land uses

• Management practicesManagement practices

• Surface / groundwater interactionsSurface / groundwater interactions

• Spatially distributed rainfall (NEXRAD)Spatially distributed rainfall (NEXRAD)

• Point source dischargesPoint source discharges

• Fine spatial resolution yield high detailFine spatial resolution yield high detail


Widely Tested and UsedWidely Tested and Used

• Florida Department of Environmental ProtectionFlorida Department of Environmental Protection• Natural Resources Conservation ServiceNatural Resources Conservation Service• Department of Agriculture and Consumer ServicesDepartment of Agriculture and Consumer Services• Environmental Protection AgencyEnvironmental Protection Agency• St Johns Water Management DistrictSt Johns Water Management District• Suwannee River Water Management DistrictSuwannee River Water Management District• South Florida Water Management DistrictSouth Florida Water Management District• NIWA – New Zealand National WQ CenterNIWA – New Zealand National WQ Center• Florida Department of Agriculture & Consumer ServicesFlorida Department of Agriculture & Consumer Services

Depression

Overland

Wetland

Stream

Flow Routing

Grid Cell

Basin Outlet

GW

Wetland

(1 ha)

Spatial Definition and Mapping

Detailed Land Use and Soils Interactions

Customized SourceCell Submodels

Individual Reach Routing

Wetland and Depression Handling

How WAM WorksHow WAM WorksHow WAM WorksHow WAM Works


• Unique Cell ModelUnique Cell Model– GLEAMS hydrologic transport model– EAAMOD hydrologic transport model– urban and wetlands submodels

• Dynamic Routing ModelDynamic Routing Model– hydrodynamic routing based on Manning’s equation– attenuation based on flow rate, characteristics of

flow path, and flow distance– coefficients for different wetland and stream types

Modeling ApproachModeling ApproachModeling ApproachModeling Approach






Cross Bayou

Watershed Assessment ModelWatershed Assessment ModelWatershed Assessment ModelWatershed Assessment Model


Suwannee River Nitrate AssessmentSuwannee River Nitrate AssessmentSuwannee River Nitrate AssessmentSuwannee River Nitrate Assessment

Ranking of Land Uses for Nitrate

Row Crops

Poultry Litter Application

Dairies

Septic Tanks

Observed DataObserved DataObserved DataObserved Data

New Zealand – Okura BasinNew Zealand – Okura BasinNew Zealand – Okura BasinNew Zealand – Okura Basin


• Verified that model could be used for Verified that model could be used for ungaged basins by use of two gaged ungaged basins by use of two gaged basinsbasins

St. Johns River ApplicationSt. Johns River Application

Farm-Version of WAMFarm-Version of WAMFarm-Version of WAMFarm-Version of WAM


Structures at Myakka River State Park

0

20

40

60

80

100

120

Jan-91 Jan-92 Jan-93 Jan-94 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan-00 Jan-01

Flo

w (

m3 /s

)

Simulated -- Reach 2 Measured -- Station S191

Flow at Structure S191Flow at Structure S191Flow at Structure S191Flow at Structure S191

0

0.5

1

1.5

2

2.5

3

3.5

4

Jan-91 Jan-92 Jan-93 Jan-94 Jan-95 Jan-96 Jan-97 Jan-98 Jan-99 Jan-00 Jan-01

To

tal

Ph

os

ph

oru

s (

pp

m)

Simulated -- Reach 62 Measured -- Station TCNS213

Phosphorus Concentration – TCNS213Phosphorus Concentration – TCNS213Phosphorus Concentration – TCNS213Phosphorus Concentration – TCNS213


SUMMARY OF FEATURESSUMMARY OF FEATURES

• Generation of Typical FarmsGeneration of Typical Farms• BMPs Build In and Easily ModifiedBMPs Build In and Easily Modified• Rain zones built into unique cellsRain zones built into unique cells• Full erosion/deposition in stream routing - pond/reservoirsFull erosion/deposition in stream routing - pond/reservoirs• Closed basins/depressions handledClosed basins/depressions handled• Vegetative areas in residential/urban simulated separatelyVegetative areas in residential/urban simulated separately• Point Sources with Service AreasPoint Sources with Service Areas• Urban / Agricultural Retention PondsUrban / Agricultural Retention Ponds• Impervious Sediment Buildup/Wash offImpervious Sediment Buildup/Wash off• Shoreline reaches for more precise delivery to rivers/lakes/estuariesShoreline reaches for more precise delivery to rivers/lakes/estuaries• Hydraulic Structures Hydraulic Structures


• RecentRecent– Enhanced flow control structures– Incorporation of WASP– Stream / groundwater interactions– NEXRAD analyses– Reduced run-times– Looped stream systems

• Coming SoonComing Soon– ArcView 8.x upgrade – Cost Analyses with Optimization

New DevelopmentsNew Developments

TMDL Modeling ToolboxTMDL Modeling Toolbox

SWET Link from ToolBox SWET Link from ToolBox

www.swet.comwww.swet.com

Date post:	17-Jan-2016
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TMDL Modeling Toolbox WAM - Flow and Nutrient Load Modeling Tool for TMDL Development Del Bottcher,...

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