Aaron Byrd Cary Talbot ERDC-CHL · 2017-08-02 · Engineer Research and Development Center US Army...

Engineer Research and Development CenterUS Army Corpsof Engineers

Advances to the GSSHA model

Aaron ByrdCary TalbotERDC-CHL

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

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

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

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

Distributed HydrologicParameters

• Uses Land Use, Soil Type Information• Uses Land Use, Soil Type Information

Cell-to-Cell Overland Flow• 2D Overland Flow• 2D Overland Flow

Channel Routing• 1D Stream Flow• 1D Stream Flow

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

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

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

Wetlands

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

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

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

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

GSSHA Simulation of the CoonCreek Watershed

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

Coon Creek Land Cover (1999)• 6 Classifications

– Urban– Corn– Soybeans– Forest– Wetlands– Grassland

• 6 Classifications– Urban– Corn– Soybeans– Forest– Wetlands– Grassland

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

Baseline

Wetland #1

Wetland #2

Wetland #3

Wetland #4

ResultsCoon Creek, Il

0 1000 2000 3000 4000 5000

Time (min)

No WetlandsWetlands 1Wetlands 2Wetland 3Wetland 4

Baseline AVI

Wetlands #4 AVI

Close-up of Baseline

Bonus: Storm Surge Modeling

Questions? Comments?

Aaron.R.Byrd@erdc.usace.army.milAaron.R.Byrd@erdc.usace.army.mil

Aaron Byrd Cary Talbot ERDC-CHL · 2017-08-02 · Engineer Research and Development Center US Army...

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