TMDL Modeling Toolbox Water Quality Analysis Simulation Program (WASP) Tim Wool US EPA - Region 4

TMDL Modeling Toolbox -- WASP WASP Overview HistoryHistory –In the Beginning –In the Middle –And Now……

TMDL Modeling Toolbox -- WASP What is WASP? Water Quality ModelWater Quality Model –Conventional Pollutants –Organic Chemicals –Mercury

TMDL Modeling Toolbox -- WASP WASP Structure WASP Transport Bookkeeping Kinetics + = EUTRO or TOXI

TMDL Modeling Toolbox -- WASP Basic WASP System Model DLL’sModel DLL’s –EUTRO.DLL -- Eutrophication Model –TOXI.DLL -- Organic Chemical Model –MERCURY.DLL – Specialized version of TOXI to handle Mercury

TMDL Modeling Toolbox -- WASP WASP Input BMD EUTRO TOXI MOVEM StoredData Hydro Model Preprocessor/Data Server Mercury Binary Model Output Graphical Post Processor Model Input File (Binary) Models Hydrodynamic Interface Exported Model Results Messages WASP Modeling Framework

TMDL Modeling Toolbox -- WASP Generalized Model FrameworkGeneralized Model Framework –Box Model –1, 2, or 3 Dimensions

TMDL Modeling Toolbox -- WASP WASP Linkages WASP Loading Models SWMM HSPF LSPC NPSM PRZM Hydrodynamic Models EFDC DYNHYD RIVMOD EPD-RIV1 SWMM Bioaccumulation FGETS FCM-2 External Spreadsheets ASCII Files Windows Clipboard

TMDL Modeling Toolbox -- WASP WASP is a Variable Complexity Modeling System When building a water body model, adjust complexity to match the problem.When building a water body model, adjust complexity to match the problem. –More Complex Aquatic Systems –More Complex Chemical or Interaction –More Complex Management Questions

TMDL Modeling Toolbox -- WASP Components of a Complex Water Body Modeling Framework Watershed loading modelsWatershed loading models Hydrodynamic and transport modelsHydrodynamic and transport models Contaminant fate modelsContaminant fate models Food web bioaccumulation modelsFood web bioaccumulation models

TMDL Modeling Toolbox -- WASP Processes that Control Complexity Network Spatial VariabilityNetwork Spatial Variability Time VariabilityTime Variability Transport PatternsTransport Patterns Loading PatternsLoading Patterns Chemical InteractionsChemical Interactions

TMDL Modeling Toolbox -- WASP WASP Transport Scheme Six Different Flow FieldsSix Different Flow Fields –Surface Water –Porewater –3 Solids Transport Fields –Evaporation/Precipitation

TMDL Modeling Toolbox -- WASP WASP Transport Scheme Flows in WASP can beFlows in WASP can be –Specified in the input dataset –Read from a hydrodynamic interface file created by another model or program

TMDL Modeling Toolbox -- WASP Simple Flow Through River

TMDL Modeling Toolbox -- WASP Hydrodynamic Linkage Complex SystemsComplex Systems –Estuaries –Stratified System Stormwater ModelingStormwater Modeling

TMDL Modeling Toolbox -- WASP Hydrodynamic Prediction of …..Prediction of ….. –Travel Time –Water Depth –Water Velocity –Temperature –Salinity

TMDL Modeling Toolbox -- WASP Little River Embayment, Lake Allatoona, GA

TMDL Modeling Toolbox -- WASP Little River Embayment, Lake Allatoona, GA

TMDL Modeling Toolbox -- WASP

Flint Creek

TMDL Modeling Toolbox Eutrophication Model

TMDL Modeling Toolbox -- WASP Processes Considered Phytoplankton KineticsPhytoplankton Kinetics Periphyton KineticsPeriphyton Kinetics Phosphorus CyclingPhosphorus Cycling Nitrogen CyclingNitrogen Cycling Dissolved Oxygen BalanceDissolved Oxygen Balance Sediment DiagenesisSediment Diagenesis

TMDL Modeling Toolbox -- WASP

TMDL Modeling Toolbox Organic Chemical Model Overview

TMDL Modeling Toolbox -- WASP

TMDL Modeling Toolbox Mercury Model Overview

TMDL Modeling Toolbox -- WASP Mercury Model VolatilizationWatershed Load State Variables Hg(0) Silt Hg(II) Sand MeHg Methylation Demethylation Oxidation Reduction Burial NPDES DOC

TMDL Modeling Toolbox Flint Creek Example

TMDL Modeling Toolbox -- WASP Flint Cr (AL)

TMDL Modeling Toolbox -- WASP