Project File:Soil Erosion – Optional

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3.10.1 Soil Erosion Simulation - Required

Card Argument Description
SOIL_EROSION  ##
integer Specifies overland soil erosion calculation method.
1 - Engelund-Hansen
2 - Kilinc Richardson
3 - Stream power
4 - Effective stream power
5 - Unit stream power
6 - Shear stress
OUTLET_SED_FLUX  "filename.osf"
file name Output file name for outlet sediment flux (cms). Output is listed in columns, first being time, followed by sediment flux for each specified sediment size. Wash sediments are listed first. Followed by the sand sizes.

3.10.2 Soil Erosion Parameters - Required

Soil erosion parameters must be specified in the Mapping Table. See description of inputs in Mapping Table Section - Chapter 12

3.10.3 Optional Inputs

Card Argument Units Default Description
SAND_SIZE  ##.##
real mm 0.25 Representative grain-size for sand-size particles.
WATER_TEMP  ##.##
real °C 20 Water temperature
SED_POROSITY  ##.##
real   0.4 Value of the porosity of channel bed sediments (0.0-1.0).
ADJUST_ELEV  "filename.ele"
file name     Inclusion of card results in new bed elevations being computed every overland soil erosion update
IN_SED_LOC  "filename.isl"
file name     Input file containing a list of internal link/node locations to output sediment hydrographs. Format identical to IN_HYD_LOC option. Valid only with CHAN_EXPLIC or DIFFUSIVE_WAVE.
OUT_SED_LOC  "filename.osl"
file name     Output file containing columns, first of time then sediment discharge (cms) for each sediment size. Sediment sizes that are wash load are listed first, followed by sand sizes. Valid only with CHAN_EXPLIC or DIFFUSIVE_WAVE.
OUTLET_SED_TSS "filename.oss"
file name     Output file containing columns, first of time then total suspended sediment(mg/L) at the watershed outlet. Valid only with CHAN_EXPLIC or DIFFUSIVE_WAVE.
OUT_TSS_LOC "filename.tss"
file name     Output file containing columns, first of time then total suspended sediment(mg/L) for each location specified in the IN_SED_LOC file. Valid only with CHAN_EXPLIC or DIFFUSIVE_WAVE.

3.10.4 Optional Outputs

Card Argument Units Default Description
NET_SED_VOLUME "base_filename.ext"
file name mm none Output net deposition (+) or erosion (-)
VOL_SED_SUSP "base_filename.ext"
file name g m-3 none Output volume of suspended sediments in each grid cell


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