TMDL Modeling Toolbox
Water Quality Analysis
Simulation Program (WASP)
Tim Wool
US EPA - Region 4
TMDL Modeling Toolbox -- WASP
WASP Overview
• History
– In the Beginning
– In the Middle
– And Now……
TMDL Modeling Toolbox -- WASP
What is WASP?
• Water Quality Model
– Conventional Pollutants
– Organic Chemicals
– Mercury
TMDL Modeling Toolbox -- WASP
WASP Structure
WASP
Transport
Bookkeeping
=
EUTRO
or
TOXI
+
Kinetics
TMDL Modeling Toolbox -- WASP
Basic WASP System
• Model 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 Modeling Framework
Model Input File (Binary)
WASP
Input
Hydrodynamic
Interface
Model Preprocessor/Data Server
Models
Binary Model Output
Stored
Data
EUTRO
Hydro
BMD
TOXI
Mercury
MOVEM
Graphical Post Processor
TMDL Modeling Toolbox -- WASP
• Generalized Model Framework
– Box Model
– 1, 2, or 3 Dimensions
TMDL Modeling Toolbox -- WASP
WASP Linkages
Loading Models
SWMM
HSPF
LSPC
NPSM
PRZM
Bioaccumulation
FGETS
FCM-2
WASP
Hydrodynamic
Models
EFDC
DYNHYD
RIVMOD
EPD-RIV1
SWMM
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.
– 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 models
Hydrodynamic and transport models
Contaminant fate models
Food web bioaccumulation models
TMDL Modeling Toolbox -- WASP
Processes that Control Complexity
•
•
•
•
•
Network Spatial Variability
Time Variability
Transport Patterns
Loading Patterns
Chemical Interactions
TMDL Modeling Toolbox -- WASP
WASP Transport Scheme
• Six Different Flow Fields
– Surface Water
– Porewater
– 3 Solids Transport Fields
– Evaporation/Precipitation
TMDL Modeling Toolbox -- WASP
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
TMDL Modeling Toolbox -- WASP
Simple Flow Through River
0
From
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To
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2
Cont
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6
200
180
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60
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5
10
15
TMDL Modeling Toolbox -- WASP
Hydrodynamic Linkage
• Complex Systems
– Estuaries
– Stratified System
• Stormwater Modeling
TMDL Modeling Toolbox -- WASP
Hydrodynamic
• Prediction of …..
– Travel Time
– Water Depth
– Water Velocity
– Temperature
– Salinity
TMDL Modeling Toolbox -- WASP
Little River Embayment, Lake Allatoona, GA
N
#
#
14302001
GAEPD Lake Stations
Streams
Lake Allatoona
Blankets Creek
14304801
#
#
Rose Creek
14309001
Little River
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#
14305601
14305801
Noonday Creek
#
14307501
2
0
2
4 Miles
TMDL Modeling Toolbox -- WASP
Little River Embayment, Lake
Allatoona, GA
Lake Sampling Stations
Grid Points
Grid Lines
NHD Little River
Roads
Lake Allatoona
Watsub4.shp
Y
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S
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Little River Embayment
Upstream of Bells Ferry Road
14304801
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TMDL Modeling Toolbox -- WASP
N
W
E
e
us r
Ne ive
R
S
Swift
Creek
Scale
0
5 km
10 km
Pamlico
Sound
Bachelor
Creek
Upper
Broad
Creek Goose
Creek
Trent
River
Beard
Creek
Broad
Creek
Greens
Creek
Dawson
Creek
Slocum
Creek
Hancock
Creek
Clubfoot
Creek
Adams
Creek
South
River
TMDL Modeling Toolbox -- WASP
N
S
#
W
E
Flint Creek
EAST LAWRENCE SCHOOL
S
S
#
ALABAMA SHERIFF'S BOYS RANCH
DANVILLE HIGH SCHOOL
Hartselle WWTP
S
#
S
#
S
#
SPEAKE SCHOOLS
Falkville HCR Lagoon
S
#
S
#
NPDES Point Sources
303(d) Listed Segments
Streams
NHD Streams
303(d) Listed Embayment
Flint Creek Embayment
Flint Creek Watershed
VINEMONT SCHOOL
S
#
10
0
10 Miles
Downstream surface boundary
Instream watershed inflow
Adjacent watershed inflow
TMDL Modeling Toolbox
Eutrophication Model
TMDL Modeling Toolbox -- WASP
Processes Considered
•
•
•
•
•
•
Phytoplankton Kinetics
Periphyton Kinetics
Phosphorus Cycling
Nitrogen Cycling
Dissolved Oxygen Balance
Sediment 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
NPDES
Watershed Load
Demethylation
Methylation
Burial
State Variables
Hg(0) Silt
Hg(II) Sand
MeHg
Volatilization
Oxidation
DOC
Reduction
TMDL Modeling Toolbox
Flint Creek Example
TMDL Modeling Toolbox -- WASP
N
S
#
W
E
EAST LAWRENCE SCHOOL
S
Flint Cr (AL)
S
#
ALABAMA SHERIFF'S BOYS RANCH
DANVILLE HIGH SCHOOL
Hartselle WWTP
S
#
S
#
S
#
SPEAKE SCHOOLS
Falkville HCR Lagoon
S
#
S
#
NPDES Point Sources
303(d) Listed Segments
Streams
NHD Streams
303(d) Listed Embayment
Flint Creek Embayment
Flint Creek Watershed
VINEMONT SCHOOL
S
#
10
0
10 Miles
Downstream surface boundary
Instream watershed inflow
Adjacent watershed inflow
TMDL Modeling Toolbox -- WASP
TMDL Modeling Toolbox -- WASP