Summary
| Also known as
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| Model type
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Modular
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| Model part of larger framework
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| Note on status model
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| Date note status model
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Technical specs
| Supported platforms
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Unix, Linux, Mac OS, Windows
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| Other platform
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| Programming language
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C++
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| Other program language
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| Code optimized
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| Multiple processors implemented
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| Nr of distributed processors
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| Nr of shared processors
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| Start year development
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1988
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| Does model development still take place?
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Yes
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| If above answer is no, provide end year model development
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| Code development status
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| When did you indicate the 'code development status'?
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| Model availability
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As code, As teaching tool, As executable"As executable" is not in the list (As code, As teaching tool) of allowed values for the "Model availability" property.
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Source code availability
(Or provide future intension)
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Through owner"Through owner" is not in the list (Through web repository, Through CSDMS repository) of allowed values for the "Source code availability" property.
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| Source web address
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| Source csdms web address
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| Program license type
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Other
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| Program license type other
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--
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| Memory requirements
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Depends on catchment
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| Typical run time
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depends on catchment size and process algorithms selected
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In/Output
| Describe input parameters
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DEM, land-use/land-cover, stream channels, precipitation, soils, aquifer maps. These index maps are used to classify catchment parameters related to overland/channel flow, soil/aquifer hydraulic properties, soil erodibility, contaminant loadings, etc. Model setup is greatly enhanced by the use of the US Dept. of Defense Watershed Modeling System (WMS), which serves as an interface between GSSHA and Arc/Info
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| Input format
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ASCII, Binary
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| Other input format
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US Dept. of Defense Watershed Modeling System (WMS)
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| Describe output parameters
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Flow rates, depths, soil moisture, sediment fluxes, erosion/deposition, contaminant/nutrient fluxes and concentrations, groundwater levels, reservoir storages.
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| Output format
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ASCII, Binary
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| Other output format
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US Dept. of Defense Watershed Modeling System (WMS)
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| Pre-processing software needed?
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No
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| Describe pre-processing software
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| Post-processing software needed?
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Yes
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| Describe post-processing software
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yes, The US Dept. of Defense Watershed Modeling system can produce animations of model outputs. Run summary file includes detailed mass balance information. Output time series can be analyzed using spreadsheet or other software.
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| Visualization software needed?
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Yes
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| If above answer is yes
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| Other visualization software
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Dept. of Defense, Watershed Modeling System (WMS)
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Process
| Describe processes represented by the model
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Processes:
- Rainfall: gage with nearest neighbor or inverse distance-squared weighting, radar.
- Interception: empirical model.
- Infiltration: Green & Ampt, Green & Ampt with redistribution, three-layer Green & Ampt, or Richard's equation.
- Overland runoff: 2-D finite volume diffusive wave with overland flow dykes and pothole lakes.
- Channel routing: 1-D dendritic finite-volume diffusive wave with culverts, on-channel lakes, rule curves, rating curves, scheduled releases.
- Groundwater: 2-D finite-difference with wells and various boundary conditions.
- Overland erosion: three alternative source equations, raindrop impact, erosion limits, deposition, arbitrary size classes.
- Channel sediment transport: advection-diffusion for fines, stream power for sands.
- Fate and transport of conservative and non-conservative
constituents in soil, overland, and channels
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| Describe key physical parameters and equations
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Too much to describe in only 500 characters! See: http://www.gsshawiki.com/wiki/index.php5?title=Main_Page
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| Describe length scale and resolution constraints
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Dependent upon computational power and memory.
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| Describe time scale and resolution constraints
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Dependent upon computational power and memory.
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| Describe any numerical limitations and issues
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Explicit finite volume routing formulations are time-step limited.
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Testing
Other
| Do you have current or future plans for collaborating with other researchers?
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The development of GSSHA has been funded by the US Army Corps of Engineers, Engineer Research and Development Center, Vicksburg, Mississippi. GSSHA is being actively used by a number of US Army Corps of Engineers districts.
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| Comments
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Current version is 4.0
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GSSHA
Introduction
History
Papers
GSSHA Questionnaire
Contact Information
| Model:
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Gridded Surface/Subsurface Hydrologic Analyis (GSSHA)
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| Contact person:
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Fred Ogden (Model developer)
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| Institute:
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University of Wyoming
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| City:
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Laramie, WY
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| Country:
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USA
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| Email:
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fogden@uwyo.edu
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| 2nd person involved:
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Charles Downer (Model developer)
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| 3rd person involved:
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Aaron Byrd (Technical contact)
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Model description
| Model type:
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Modular model for the terrestrial domain.
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| Description:
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Gridded Surface Subsurface Hydrologic Analysis (GSSHA) is a grid-based two-dimensional hydrologic model. Features include 2D overland flow, 1D stream flow, 1D infiltration, 2D groundwater, and full coupling between the groundwater, vadoze zone, streams, and overland flow. GSSHA can run in both single event and long-term modes. The fully coupled groundwater to surfacewater interaction allows GSSHA to model both Hortonian and Non-Hortonian basins.
New features of version 2.0 include support for small lakes and detention basins, wetlands, improved sediment transport, and an improved stream flow model.
GSSHA has been successfully used to predict soil moistures as well as runoff and flooding.
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Technical information
| Supported platforms:
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Unix, Linux, Mac OS X, Windows
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| Programming language:
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C++
|
| Model development started at:
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1988 and development still takes place
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| To what degree will the model become available:
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Executable freely available. As teaching tool or for research/studies. Code access on a limited collaborative basis. Contact developers.
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| Current license type:
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--
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| Memory requirements:
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Depends on catchment
|
| Typical run time:
|
depends on catchment size and process algorithms selected
|
Input / Output description
| Input parameters:
|
DEM, land-use/land-cover, stream channels, precipitation, soils, aquifer maps. These index maps are used to classify catchment parameters related to overland/channel flow, soil/aquifer hydraulic properties, soil erodibility, contaminant loadings, etc. Model setup is greatly enhanced by the use of the US Dept. of Defense Watershed Modeling System (WMS), which serves as an interface between GSSHA and Arc/Info
|
| Input format:
|
ASCII, Binary & US Dept. of Defense Watershed Modeling System (WMS)
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| Output parameters:
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Flow rates, depths, soil moisture, sediment fluxes, erosion/deposition, contaminant/nutrient fluxes and concentrations, groundwater levels, reservoir storages.
|
| Output format:
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ASCII, Binary & US Dept. of Defense Watershed Modeling System (WMS)
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| Post-processing software (if needed):
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yes, The US Dept. of Defense Watershed Modeling system can produce animations of model outputs. Run summary file includes detailed mass balance information. Output time series can be analyzed using spreadsheet or other software.
|
| Visualization software (if needed):
|
Dept. of Defense, Watershed Modeling System (WMS)
|
Process description
| Processes represented by model:
|
- Rainfall: gage with nearest neighbor or inverse distance-squared weighting, radar.
- Interception: empirical model.
- Infiltration: Green & Ampt, Green & Ampt with redistribution, three-layer Green & Ampt, or Richard's equation.
- Overland runoff: 2-D finite volume diffusive wave with overland flow dykes and pothole lakes.
- Channel routing: 1-D dendritic finite-volume diffusive wave with culverts, on-channel lakes, rule curves, rating curves, scheduled releases.
- Groundwater: 2-D finite-difference with wells and various boundary conditions.
- Overland erosion: three alternative source equations, raindrop impact, erosion limits, deposition, arbitrary size classes.
- Channel sediment transport: advection-diffusion for fines, stream power for sands.
- Fate and transport of conservative and non-conservative
constituents in soil, overland, and channels
|
| Key physical parameters & equations:
|
Too much to describe in only 500 characters! See: http://www.gsshawiki.com/wiki/index.php5?title=Main_Page
|
| Length scale & resolution constraints:
|
Dependent upon computational power and memory.
|
| Time scale & resolution constraints:
|
Dependent upon computational power and memory.
|
| Numerical limitations and issues :
|
Explicit finite volume routing formulations are time-step limited.
|
Testing
User groups
| Currently or plans for collaborating with:
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The development of GSSHA has been funded by the US Army Corps of Engineers, Engineer Research and Development Center, Vicksburg, Mississippi. GSSHA is being actively used by a number of US Army Corps of Engineers districts.
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Documentation
| Key papers of the model:
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- Downer, C.W., and F.L. Ogden, 2006, Gridded Surface Subsurface Hydrologic Analysis (GSSHA) User's Manual, Version 1.43 for Watershed Modeling System 6.1, System Wide Water Resources Program, Coastal and Hydraulics Laboratory, U.S. Army Corps of Engineers, Engineer Research and Development Center, ERDC/CHL SR-06-1, 207 pp.
- Downer, C.W., and F.L. Ogden, 2004, Appropriate Vertical Discretization of Richard's Equation for Two-Dimensional Watershed-Scale Modelling, Hydrological Processes, 18:1-22.
- Downer, C.W., and F.L. Ogden, 2004, GSSHA: A model for simulating diverse streamflow generating processes, J. Hydrol. Engrg., 9(3):161-174.
- Downer, C.W., and F.L. Ogden, 2004, Prediction of runoff and soil moistures at the watershed scale: Effects of model complexity and parameter assignment, Water Resour. Res., 39(3), 10.1029/2002WR001439.
- Johnson, B.E., and T.K. Gerald, 2006, Development of nutrient submodules for use in the Gridded Surface Subsurface Hydrologic Analysis (GSSHA) Distributed Watershed Model., J. Am. Water Resour. Assn., 42(6):1502-1525.
- Kalin, L. and M.H. Hantush, 2006, Comparative assessment of two distributed watershed models with application to a small watershed, Hydrol. Processes, 20(11):2285-2307.
- Levy, J.K., J.E.T. Moncur, and K. Takara, 2006, Introduction: Enhancing the capacity for sustainable watershed management, J. Am. Water Resour. Assn., pp. 1437-1439.
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| Is there a manual available:
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yes
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| Model website if any:
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http://chl.erdc.usace.army.mil/gssha
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| Comments:
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Current version is 4.0
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Issues
Help
Input Files
Output Files
Download
Source |
