Water Quality Analysis Simulation Program (WASP)

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Water Quality Analysis Simulation Program (WASP)

• Tim Wool
• US EPA - Region 4

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WASP Overview

• History
• In the Beginning
• In the Middle
• And Now

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What is WASP?

• Water Quality Model
• Conventional Pollutants
• Organic Chemicals
• Mercury

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WASP Structure
WASP Transport Bookkeeping
EUTRO or TOXI


Kinetics
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Basic WASP System

• Model DLLs
• EUTRO.DLL -- Eutrophication Model
• TOXI.DLL -- Organic Chemical Model
• MERCURY.DLL Specialized version of TOXI to
  handle Mercury

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WASP Modeling Framework
Model Preprocessor/Data Server
Model Input File (Binary)
WASP
Input
Messages
Models
Binary Model Output
Hydrodynamic Interface
Stored Data
BMD
EUTRO
Hydro
TOXI
Exported Model Results
Mercury
MOVEM
Graphical Post Processor
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• Generalized Model Framework
• Box Model
• 1, 2, or 3 Dimensions

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WASP Linkages
Loading Models SWMM HSPF LSPC NPSM PRZM
Bioaccumulation FGETS FCM-2
WASP
Hydrodynamic Models EFDC DYNHYD RIVMOD EPD-RIV1 S
WMM
External Spreadsheets ASCII Files Windows
Clipboard
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WASP is a Variable Complexity Modeling System

• 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

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Components of a Complex Water Body Modeling
Framework

• Watershed loading models
• Hydrodynamic and transport models
• Contaminant fate models
• Food web bioaccumulation models

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Processes that Control Complexity

• Network Spatial Variability
• Time Variability
• Transport Patterns
• Loading Patterns
• Chemical Interactions

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WASP Transport Scheme

• Six Different Flow Fields
• Surface Water
• Porewater
• 3 Solids Transport Fields
• Evaporation/Precipitation

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WASP Transport Scheme

• Flows in WASP can be
• Specified in the input dataset
• Read from a hydrodynamic interface file created
  by another model or program

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Simple Flow Through River
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0
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Hydrodynamic Linkage

• Complex Systems
• Estuaries
• Stratified System
• Stormwater Modeling

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Hydrodynamic

• Prediction of ..
• Travel Time
• Water Depth
• Water Velocity
• Temperature
• Salinity

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Little River Embayment, Lake Allatoona, GA
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Little River Embayment, Lake Allatoona, GA
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Flint Creek
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Eutrophication Model
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Processes Considered

• Phytoplankton Kinetics
• Periphyton Kinetics
• Phosphorus Cycling
• Nitrogen Cycling
• Dissolved Oxygen Balance
• Sediment Diagenesis

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Organic Chemical Model

• Overview

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Mercury Model

• Overview

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Mercury Model
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Flint Creek Example
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Flint Cr (AL)
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