aaron byrd cary talbot erdc-chl · 2017-08-02 · engineer research and development center us army...
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Engineer Research and Development CenterUS Army Corpsof Engineers
Advances to the GSSHA model
Aaron ByrdCary TalbotERDC-CHL
Aaron ByrdCary TalbotERDC-CHL
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Engineer Research and Development CenterUS Army Corpsof Engineers
System-Wide Water ResourcesProgram (SWWRP)
• 7-year USACE R&D initiative designed toassemble and integrate the diverse componentsof water resources management
• The ultimate goal is to provide to the Corps, itspartners, and stakeholders the overalltechnological framework and analytical tools torestore and manage water resources andbalance human development activities withnatural system requirements
• 7-year USACE R&D initiative designed toassemble and integrate the diverse componentsof water resources management
• The ultimate goal is to provide to the Corps, itspartners, and stakeholders the overalltechnological framework and analytical tools torestore and manage water resources andbalance human development activities withnatural system requirements
https://swwrp.usace.army.mil
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Engineer Research and Development CenterUS Army Corpsof Engineers
SWWRP Program StructureC
orps Bu
siness Lin
esUSACE/National Water Resource Needs
Regional SedimentManagement
• River Basin Morphology,Modeling, & Management
• Coastal Morphology,Modeling, & Management
• Sediment ManagementMethods
• Sediment Processes Studies
Regional WaterManagement
• Watershed HydrologySimulation
• Riverine & EstuarineSimulation
• Coastal Simulation• Water Processes &
Assessments
EcosystemAssessment &Management
• LandscapeAssessment
• Transport Modeling• Ecological Modeling• Ecosystem Response
Forecasting• Ecosystem Processes
Unifying Technologies• Integrating Frameworks• Data Management• Geospatial Applications Development• Regional Measurement and Monitoring• Model Integration• Decision Support and Knowledge Management
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Engineer Research and Development CenterUS Army Corpsof Engineers
SWWRPWatershed Hydrology Simulation
• 5 Research Areas– HMS development– GSSHA development– Uncertainty/parameter estimation/stochastic
simulation tools for system-scale models– Regional flood prediction– Coupled, multi-dimensional groundwater-
surface water interaction simulation
• 5 Research Areas– HMS development– GSSHA development– Uncertainty/parameter estimation/stochastic
simulation tools for system-scale models– Regional flood prediction– Coupled, multi-dimensional groundwater-
surface water interaction simulation
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Engineer Research and Development CenterUS Army Corpsof Engineers
GSSHA• Distributed, physically-based Gridded Surface
Subsurface Hydrological Analysis (GSSHA)model
• Simulates 2D overland flow, 1D channel routing,2D saturated groundwater flow, canopyretention, microtopography, 1D infiltration andET using finite-difference and finite-volumemethods
• Distributed, physically-based Gridded SurfaceSubsurface Hydrological Analysis (GSSHA)model
• Simulates 2D overland flow, 1D channel routing,2D saturated groundwater flow, canopyretention, microtopography, 1D infiltration andET using finite-difference and finite-volumemethods
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Engineer Research and Development CenterUS Army Corpsof Engineers
Distributed HydrologicParameters
• Uses Land Use, Soil Type Information• Uses Land Use, Soil Type Information
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Engineer Research and Development CenterUS Army Corpsof Engineers
Cell-to-Cell Overland Flow• 2D Overland Flow• 2D Overland Flow
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Engineer Research and Development CenterUS Army Corpsof Engineers
Channel Routing• 1D Stream Flow• 1D Stream Flow
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Engineer Research and Development CenterUS Army Corpsof Engineers
Subsurface Flow• Infiltration
– Green & Ampt– Green & Ampt with Soil Moisture
Redistribution– 1-D Richards’ Equation– Sacramento Soil Moisture Accounting
• 2D Groundwater– Full interaction
• Infiltration– Green & Ampt– Green & Ampt with Soil Moisture
Redistribution– 1-D Richards’ Equation– Sacramento Soil Moisture Accounting
• 2D Groundwater– Full interaction
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Engineer Research and Development CenterUS Army Corpsof Engineers
Sources/Sinks• Precipitation
– Gage• Theissen• IDW
– Radar
• Evapotranspiration– Long-term simulation– Soil Moisture Accounting
• Precipitation– Gage
• Theissen• IDW
– Radar
• Evapotranspiration– Long-term simulation– Soil Moisture Accounting
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Engineer Research and Development CenterUS Army Corpsof Engineers
Hydrologic Elements/Options• Lakes & Reservoirs• Wetlands• Hydraulic Structures – Culverts, Weirs• Embankments• Sediment Erosion and Deposition• Contaminant Transport• Storm Pipe, Tile Drain Network
• Lakes & Reservoirs• Wetlands• Hydraulic Structures – Culverts, Weirs• Embankments• Sediment Erosion and Deposition• Contaminant Transport• Storm Pipe, Tile Drain Network
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Engineer Research and Development CenterUS Army Corpsof Engineers
Lakes
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Engineer Research and Development CenterUS Army Corpsof Engineers
Wetlands
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Engineer Research and Development CenterUS Army Corpsof Engineers
Wetlands• Specify:
– Retention Depth– Vegetation Height– Lateral Hydraulic
Conductivity• Seepage Face• Vegetation
– Fully SubmergedVegetation RoughnessCoefficient
• Specify:– Retention Depth– Vegetation Height– Lateral Hydraulic
Conductivity• Seepage Face• Vegetation
– Fully SubmergedVegetation RoughnessCoefficient
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Engineer Research and Development CenterUS Army Corpsof Engineers
Wetlands• Flow Through Seepage Face
– Darcian, Q=kiA– Hydraulic gradient from cell center to cell
center
• Flow Through Seepage Face– Darcian, Q=kiA– Hydraulic gradient from cell center to cell
center
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Engineer Research and Development CenterUS Army Corpsof Engineers
Wetlands• Overtopping flow (Flow Through Vegetation)
– Combination of Darcian, Manning’s• Overtopping flow (Flow Through Vegetation)
– Combination of Darcian, Manning’s
Darcian FlowDarcian Flow
Manning’s FlowManning’s Flow
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Engineer Research and Development CenterUS Army Corpsof Engineers
How to Obtain GSSHA• Fully supported in WMS version 7.x• http://chl.erdc.usace.army.mil/software/wms• Fully supported in WMS version 7.x• http://chl.erdc.usace.army.mil/software/wms
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Engineer Research and Development CenterUS Army Corpsof Engineers
GSSHA Simulation of the CoonCreek Watershed
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Engineer Research and Development CenterUS Army Corpsof Engineers
Coon Creek Simplified Soils• 8 Soil Types• 3 Subsurface
Layers• Simplified by
similar surface,subsurfacecharacteristics
• 8 Soil Types• 3 Subsurface
Layers• Simplified by
similar surface,subsurfacecharacteristics
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Engineer Research and Development CenterUS Army Corpsof Engineers
Coon Creek Land Cover (1999)• 6 Classifications
– Urban– Corn– Soybeans– Forest– Wetlands– Grassland
• 6 Classifications– Urban– Corn– Soybeans– Forest– Wetlands– Grassland
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Engineer Research and Development CenterUS Army Corpsof Engineers
Project Goals• Develop Watershed Management Plan
– Placement of 1600 ac of wetlands– Removal of tile drain– Assess impacts of future land use
• Develop Watershed Management Plan– Placement of 1600 ac of wetlands– Removal of tile drain– Assess impacts of future land use
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Engineer Research and Development CenterUS Army Corpsof Engineers
Baseline
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Engineer Research and Development CenterUS Army Corpsof Engineers
Wetland #1
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Engineer Research and Development CenterUS Army Corpsof Engineers
Wetland #2
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Engineer Research and Development CenterUS Army Corpsof Engineers
Wetland #3
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Engineer Research and Development CenterUS Army Corpsof Engineers
Wetland #4
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Engineer Research and Development CenterUS Army Corpsof Engineers
ResultsCoon Creek, Il
0
20
40
60
80
100
120
140
0 1000 2000 3000 4000 5000
Time (min)
Flow
(cm
s)
No WetlandsWetlands 1Wetlands 2Wetland 3Wetland 4
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Engineer Research and Development CenterUS Army Corpsof Engineers
Baseline AVI
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Engineer Research and Development CenterUS Army Corpsof Engineers
Wetlands #4 AVI
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Engineer Research and Development CenterUS Army Corpsof Engineers
Close-up of Baseline
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Engineer Research and Development CenterUS Army Corpsof Engineers
Bonus: Storm Surge Modeling
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Engineer Research and Development CenterUS Army Corpsof Engineers
Questions? Comments?
[email protected]@erdc.usace.army.mil