User:Jcreer/SWB: Difference between revisions
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{{ | {{Future feature}} | ||
The Soil-Water-Balance (SWB) model has been developed by USGS to allow estimates of potential recharge to be made quickly and easily. | The Soil-Water-Balance (SWB) model has been developed by USGS to allow estimates of potential recharge to be made quickly and easily. | ||
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*Available soil-water capacity | *Available soil-water capacity | ||
*Surface-water flow direction | *Surface-water flow direction | ||
In addition to gridded land-surface data the model requires tabular daily climatological data (daily precip (inches), average air temperature [F], max air temp [F], min air temp [F]). Additional data may be required depending on model options: | In addition to gridded land-surface data the model requires tabular daily climatological data (daily precip (inches), average air temperature [F], max air temp [F], min air temp [F]). Additional data may be required depending on model options: | ||
# daily average wind speed (m/s), | |||
# daily average relative humidity (%), | |||
# daily max relative humidity (%), | |||
# daily percentage of possible sunshine (%). | |||
Finally a lookup table must be supplied to assign curve numbers, interception values, rooting depths, and maximum daily recharge values. | |||
==Creating an SWB Simulation== | ==Creating an SWB Simulation== | ||
To create an SWB simulation, do the following: | To create an SWB simulation, do the following: | ||
# Right-click on the "[[File:Project Icon.svg|15 px]] Project" item the Project Explorer and select ''New Simulation'' | '''SWB'''. | # Right-click on the "[[File:Project Icon.svg|15 px]] Project" item the Project Explorer and select ''New Simulation'' | '''SWB'''. | ||
A new "Simulation Data" [[File:Simulation Data Icon.svg|16 px]] item will appear in the Project Explorer, along with a "SWB Simulations" [[File:Simulation Folder Icon.svg|16 px]] item and a new simulation [[File:Simulation InactiveIcon.svg|16 px]] item. Right-clicking on the "SWB Simulations" [[File:Simulation Folder Icon.svg|16 px]] item also has a '''New Simulation''' command that allows adding additional SWB simulations to the project. | |||
==Simulation Menu== | ==Simulation Menu== | ||
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* '''Save, Export, and Launch SWB''' – Combines several other commands together. First, it saves the project file, then exports files for the model run, and finally launches the SWB model run. | * '''Save, Export, and Launch SWB''' – Combines several other commands together. First, it saves the project file, then exports files for the model run, and finally launches the SWB model run. | ||
* '''Properties''' – Opens the ''Properties'' dialog which displays the simulation properties and allows adding notes. | * '''Properties''' – Opens the ''Properties'' dialog which displays the simulation properties and allows adding notes. | ||
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==Model Control== | ==Model Control== | ||
[[File:SWB ModelControl.png|thumb|340 px|Example of the SWB ''Model Control'' dialog]] | |||
The parameters for the SWB model run are set in the ''Model Control'' dialog. | The parameters for the SWB model run are set in the ''Model Control'' dialog. | ||
===Required Inputs=== | ===Required Inputs=== | ||
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**'''Insert Below''' – Adds a row in the table below the current selected row. | **'''Insert Below''' – Adds a row in the table below the current selected row. | ||
** '''Delete''' – Removes the selected row from the table. | ** '''Delete''' – Removes the selected row from the table. | ||
--> | |||
==SWB Output Files== | ==SWB Output Files== | ||
After running the model, SWB will generate several output files. | After running the model, SWB will generate several output files. | ||
* | *Recharge daily statistics – Contains the minimum, maximum, and mean values for all major components of the water balance for all grid cells in the model on a given day. | ||
* | *Recharge daily report – Contains values representing the individual daily values summed over the entire model multiplied by the conversion factor. | ||
* | *Recharge annual statistics – Contains mean values representing the annual sum of daily mean values. | ||
*model run | *Log file – Contains a report of the processes performed during the model run. | ||
* | *Grid and image files – Based on the selected optional output variables in the model control. | ||
==External Links== | ==External Links== | ||
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{{Navbox GMS}} | {{Navbox GMS}} | ||
[[Category:Numerical Models]] | |||
[[Category:SWB]] | |||
Latest revision as of 17:08, 4 January 2021
 |
This contains information about future features. |
 |
The Soil-Water-Balance (SWB) model has been developed by USGS to allow estimates of potential recharge to be made quickly and easily.
Required Input
Four gridded datasets are required:
- Hydrologic soil group
- land use/land cover
- Available soil-water capacity
- Surface-water flow direction
In addition to gridded land-surface data the model requires tabular daily climatological data (daily precip (inches), average air temperature [F], max air temp [F], min air temp [F]). Additional data may be required depending on model options:
- daily average wind speed (m/s),
- daily average relative humidity (%),
- daily max relative humidity (%),
- daily percentage of possible sunshine (%).
Finally a lookup table must be supplied to assign curve numbers, interception values, rooting depths, and maximum daily recharge values.
Creating an SWB Simulation
To create an SWB simulation, do the following:
- Right-click on the "
Project" item the Project Explorer and select New Simulation | SWB.
A new "Simulation Data" 
item will appear in the Project Explorer, along with a "SWB Simulations" 
item and a new simulation 
item. Right-clicking on the "SWB Simulations" item also has a New Simulation command that allows adding additional SWB simulations to the project.
Simulation Menu
Right-clicking on the simulation item in the Project Explorer will bring up the following menu command:
- Delete – Removes the simualation item.
- Duplicate Creates a copy for the simulation, including all parameters set in the model control.
- Rename – Allows changing the name of the simulation item.
- Model Control – Opens the Model Control dialog where the model run parameters are set.
- Model Check – Looks for potential errors in the model setup. Brings up the Model Checker dialog if issues are discovered.
- Export SWB – Generates files used in the model run.
- Launch SWB – Starts the SWB model run and opens the Simulation Run Queue dialog.
- Save, Export, and Launch SWB – Combines several other commands together. First, it saves the project file, then exports files for the model run, and finally launches the SWB model run.
- Properties – Opens the Properties dialog which displays the simulation properties and allows adding notes.
SWB Output Files
After running the model, SWB will generate several output files.
- Recharge daily statistics – Contains the minimum, maximum, and mean values for all major components of the water balance for all grid cells in the model on a given day.
- Recharge daily report – Contains values representing the individual daily values summed over the entire model multiplied by the conversion factor.
- Recharge annual statistics – Contains mean values representing the annual sum of daily mean values.
- Log file – Contains a report of the processes performed during the model run.
- Grid and image files – Based on the selected optional output variables in the model control.
External Links
GMS – Groundwater Modeling System | ||
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