Difference between revisions of "Snow Card Inputs - Optional"

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| <pre>NWSRFS_FR_USE  ##.##</pre> || ''real'' || ''fraction'' || Specifies the fraction of precipitation in the form of rain when temperature drop below '''MBASE'''.
 
| <pre>NWSRFS_FR_USE  ##.##</pre> || ''real'' || ''fraction'' || Specifies the fraction of precipitation in the form of rain when temperature drop below '''MBASE'''.
 
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| <pre>NWSRFS_TIPM ##.##</pre> || ''real'' || mm/hr || Intensity of spatially- and temporally-uniform rainfall.  Required only for '''PRECIP_UNIF.'''
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| <pre>NWSRFS_TIPM   ##.##</pre> || ''real'' || &nbsp; || Snow Cover Thermal Gradient
 
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| <pre>RAIN_DURATION  ##</pre> || ''integer'' || minutes || Duration of spatially- and temporally-uniform rainfall.  Required only for '''PRECIP_UNIF'''.
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| <pre>NWSRFS_NMF    ##.##</pre> || ''real'' || mm/&deg;C/dt || Negative Melt Factor.
 
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| <pre>START_DATE [yr mo day]</pre> || ''integers'' || year<br>month<br>day || Year, month, and day of the beginning of a simulation.  Required only for '''PRECIP_UNIF'''.  See section on rainfall input for format description.  This card can also be used with long term simulations to start the simulation at a point other than the beginning of the hmet time series.  See long term simulation information.
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| <pre>NWSRFS_FUA    ##.##</pre> || ''real'' || &nbsp; || Empirical Wind Function Factor.
 
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| <pre>START_TIME [hr min]</pre> || ''integers'' || hr<br>minute || Hour and minute of the beginning of a simulation.  Required only for '''PRECIP_UNIF'''.  See section on rainfall input for format description.  This card can also be used with long term simulations to start the simulation at a point other than the beginning of the hmet time series.  See long term simulation information.   
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| <pre>NWSRFS_PLWHC  ##.##</pre> || ''real'' || % || Percent Liquid Water Holding Capacity.   
 
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| <pre>PRECIP_FILE  "filename.gag"</pre> || ''file name'' || &nbsp; || Input ASCII file containing spatially and temporally varied rainfall rates (mm hr<sup>-1</sup>).  See the manual section titled <font style="text-decoration: underline">Precipitation Input</font> for a description of the file format.  Mutally exclusive with '''PRECIP_UNIF'''.   
 
| <pre>PRECIP_FILE  "filename.gag"</pre> || ''file name'' || &nbsp; || Input ASCII file containing spatially and temporally varied rainfall rates (mm hr<sup>-1</sup>).  See the manual section titled <font style="text-decoration: underline">Precipitation Input</font> for a description of the file format.  Mutally exclusive with '''PRECIP_UNIF'''.   
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| <pre>RAIN_INV_DISTANCE</pre> || ''none'' || &nbsp; || Inverse distance squared rainfall interpolation.  REQUIRED for '''PRECIP_FILE'''.  Mutually exclusive with '''RAIN_THIESSEN'''.
 
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| <pre>RAIN_THIESSEN</pre> || ''none'' || &nbsp; || Thiessen polygon (nearest neighbor) rainfall interpolation.  Recommended particularly when rainfall rates are derived from radar estimates.  REQUIRED for '''PRECIP_FILE'''.  Mutually exclusive with '''RAIN_INV_DISTANCE'''.
 
 
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Revision as of 15:30, 28 November 2012

The following tables list all project file cards pertaining to snow accumulation, melt, and melt-water transport. The Hybrid Energy Balance method is the default snow melt method (no additional card required to run this method).


Cards Associated with BOTH Hybrid Energy Balance and Temperature Index Methods

Card Argument Units Description 
NWSRFS_FR_USE  ##.##
 real fraction Specifies the fraction of precipitation in the form of rain when temperature drop below MBASE. 
NWSRFS_TIPM    ##.##
 real   Snow Cover Thermal Gradient 
NWSRFS_NMF     ##.##
 real mm/°C/dt Negative Melt Factor. 
NWSRFS_FUA     ##.##
 real   Empirical Wind Function Factor. 
NWSRFS_PLWHC   ##.##
 real  % Percent Liquid Water Holding Capacity. 
PRECIP_FILE  "filename.gag"
 file name   Input ASCII file containing spatially and temporally varied rainfall rates (mm hr-1). See the manual section titled Precipitation Input for a description of the file format. Mutally exclusive with PRECIP_UNIF.


GSSHA User's Manual

3 Project File
3.1     Required Inputs
3.2     Mapping Table – Optional
3.3     Overland Flow – Required
3.4     Interception – Optional
3.5     Rainfall Input and Options – Required
3.6     Infiltration – Optional
3.7     Channel Routing – Optional
3.8     Continuous Simulations – Optional
3.9     Saturated Groundwater Flow – Optional
3.10     Soil Erosion – Optional
3.11     Constituent Transport – Optional
3.12     Subsurface Drainage Network – Optional
3.13     Output Files – Required


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