From Gsshawiki
3.7.1 Required Inputs
The following cards are REQUIRED for the simulation of channel routing.
| Card | Argument | Description
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DIFFUSIVE_WAVE | none | Specifies explicit diffusive-wave 1-D channel routing.
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CHAN_EXPLIC | none | Specifies explicit diffusive-wave 1-D channel routing. Performs same function as DIFFUSIVE_WAVE.
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CHANNEL_INPUT "filename.cif" | file name | Input ASCII file containing channel network connectivity and cross-sectional information for each link/node.
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STREAM_CELL "filename.gst" | file name | Input ASCII file containing channel/grid connectivity information.
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OUTLET_HYDRO "filename.otl" | file name | Output ASCII file containing discharge (m3 s-1) unless QOUT_CFS flag is specified (ft3 s-1)
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SECTION_TABLE "filename.ext" | file name | Input ASCII file containing cross-section information for irregular, break-point channel cross-sections. REQUIRED if look-up table cross-sections are specified in the CHANNEL_INPUT file.
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3.7.2 Initial Condition and Boundary Condition - Optional
| Card | Argument | Description
|
EXPLIC_BACKWATER "filename.ext" | file name | Save explicit channel routing end of run values of channel depth (m) and discharge (m3 s-1) for each cell.
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EXPLIC_HOTSTART "filename.ext" | file name | Start explicit channel calculations using the values of channel depth and flow in the named file.
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WRITE_CHAN_HOTSTART "filename.ext" | file name | Save explicit channel routing end of run values of channel depth (m) and discharge (m3 s-1) for each cell.
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READ_CHAN_HOTSTART "filename.ext" | file name | Start explicit channel calculations using the values of channel depth and flow in the named file.
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OVERBANK_FLOW | none | Allow water in channel to flow back onto overland flow plane when stream elevation is above top of bank and the adjacent overland cell elevation.
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OVERLAND_BACKWATER | none | Include backwater effects on overland when stream water surface elevation is greater than overland flow surface elevation without allowing water in channel to flow back onto overland.
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CHAN_POINT_INPUT | file name | Input ASCII file containing the point source input location, discharge, and concentrations.
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3.7.3 Stream Losses/Gains - Optional
3.7.3.1 General
| Card | Argument | Units | Description
|
STREAM_LOSS | none | none | Card is used to specify that stream losses be computed when the WATER_TABLE card is not included in the project file.
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3.7.3.2 Parameters
Used with WATER_TABLE or STREAM_LOSS card. These parameters may also be distributed along the channel by assigning in the CHAN_INPUT file.
| Card | Argument | Units | Description
|
K_RIVER ##.## | real | cm hr-1 | Uniform hydraulic conductivity of streambed material. REQUIRES WATER_TABLE or STREAM_LOSS. May also be distributed in CHAN_INPUT file.
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M_RIVER ##.## | real | cm | Uniform thickness of streambed material. Requires WATER_TABLE or STREAM_LOSS. May also be distributed in CHAN_INPUT file.
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3.7.4 Optional Output
| Card | Argument | Description
|
IN_HYD_LOCATION "filename.ihl" | table name | Input ASCII file specifying link/node pairs to write out time series data specified by OUT_HYD_LOCATION, OUT_DEP_LOCATION, or OUT_CON_LOCATION.
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OUT_HYD_LOCATION "filename.ohl" | filename | Filename to output time series discharge data (m3 s-1 or ft3 s-1) at points specified in IN_HYD_LOCATION. REQUIRED if IN_HYD_LOCATION was specified.
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OUT_DEP_LOCATION "filename.odl" | filename | Filename to output channel depths (m) every HYD_FREQ time steps at locations specified in the IN_HYD_LOCATION file.
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IN_SED_LOC "filename.isl" | table name | Input ASCII file containing a list of internal link/node locations where the user wants to save sediment hydrographs. Format identical to IN_HYD_LOC option. REQUIRES SOIL_EROSION.
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OUT_SED_LOC "filename.osl" | filename | Filename to output sediment flux hydrographs every HYD_FREQ time steps at internal catchment locations specified in the IN_SED_LOC file. REQUIRED if SOIL_EROSION and IN_SED_LOC card are specified.
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STRICT_JULIAN_DATE | none | Specifies all time series data use strict Julian format.
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CHAN_DEPTH "filename.cdp" | filename | Filename to output link/node data of channel depth (m) every MAP_FREQ time steps.
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CHAN_STAGE "filename.cds" | filename | Filename to output link/node data of channel stage (m) every MAP_FREQ time steps.
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CHAN_DISCHARGE "filename.cdq" | filename | Filename to output link/node data of channel discharge (m3 s-1) every MAP_FREQ time steps.
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CHAN_VELOCITY "filename.cdv" | filename | Filename to output link/node data of channel velocity (m s-1) every MAP_FREQ time steps.
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- 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 Output Files – Required
