an introduction to water quality models
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Transcript of an introduction to water quality models
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A model is more like a
Than a
-Dominic Di Toro
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Lakes , reservoirs and ponds , rivers and streams & estuaries
Sediments
Organic loadings &
toxic chemicals
Nutrients & temprature
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nutrients, organic loadings, sediments, toxic chemicals,
and temperature
stressors
algal, macrophyte, invertebrate
, and fishs
victims
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CORMIX3
CORMIX2
CORMIX1
Submerged Single
Port Discharges
Plume
Characteristics of
Submerged Multiport
discharges
Buoyant Surface
Discharges
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The time varying
processes of advection
point and diffuse mass
loading
Disper-sion
boundaryexchange
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Eutro.
Heat
MercuryOrganic
Toxicants
Simple Toxicants
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Water ResourcesData Base
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Spatial Grid
x/y Plots
Post Process.
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WASPInput
BMD
Eutrophication
Conservative
Toxicant
MOVEM
Stored
DataHydro
Model Preprocessor/Data Server
Mercury
Binary Model Output
Graphical Post Processor
ModelsHydrodynamicInterface
CSV, ASCII Output
Organic
Toxicants
Heat
Binary Wasp Input File (wif)
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• Network Flexibility
• Most Water Quality Problems
• Separation of Processes
• External Links to Models and Spreadsheets
• Two Solution Techniques
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• Does not handle some variables and processes:– Mixing zone processes
– Non aqueous phase liquids (e.g., oil spills)
– Segment drying (mudflats, flood plains)
– Metals speciation reactions (special module, META4, not part of general WASP release)
• Potentially large external hydrodynamic files
• Separate eutrophication and toxicant fate modules
• Cannot readily be run in batch mode
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Conventional Polutants (N, P, Dissolved
O, BOD, SOD, Algae)
Ph
Periphyton
Pathogens
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REFERENCES
U.S Environnemental Protection Agency (EPA.gov)
AQUATOX fact sheet
CORMIX user manual
WASP7 spread sheet
Qual2K user manual
Environmental Laboratory of U.S Army(el.erdc.usace.army.mil)
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