Difference between revisions of "Project File:Rainfall Input and Options – Required"

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Latest revision as of 20:26, 5 August 2009

The following table lists all project file cards pertaining to rainfall input. Either, but not both, PRECIP_UNIF or PRECIP_FILE must be included in each GSSHA project file.

Card Argument Units Description 
PRECIP_UNIF
 none   Specifies spatially and temporally uniform rainfall. Also requires: RAIN_INTENSITY, RAIN_DURATION, START_DATE, START TIME. Mutually exclusive with PRECIP_FILE. 
RAIN_INTENSITY  ##.##
 real mm/hr Intensity of spatially- and temporally-uniform rainfall. Required only for PRECIP_UNIF. 
RAIN_DURATION  ##
 integer minutes Duration of spatially- and temporally-uniform rainfall. Required only for PRECIP_UNIF. 
START_DATE [yr mo day]
 integers year
month
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. 
START_TIME [hr min]
 integers hr
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. 
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. 
RAIN_INV_DISTANCE
 none   Inverse distance squared rainfall interpolation. REQUIRED for PRECIP_FILE. Mutually exclusive with RAIN_THIESSEN. 
RAIN_THIESSEN
 none   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.


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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