Model:TopoFlow-Channels-Diffusive Wave: Difference between revisions
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|Spatialscale=Landscape-Scale, Watershed-Scale | |Spatialscale=Landscape-Scale, Watershed-Scale | ||
|One-line model description=Diffusive Wave process component for a D8-based, spatial hydrologic model | |One-line model description=Diffusive Wave process component for a D8-based, spatial hydrologic model | ||
|Extended model description=This process component is part of a | |Extended model description=This process component is part of a spatially-distributed hydrologic model called TopoFlow, but it can now be used as a stand-alone model. It uses the "diffusive wave" method to compute flow velocities for all of the channels in a | ||
spatially-distributed hydrologic model called TopoFlow, but it can | D8-based river network. This method includes a pressure gradient term that is induced by a water-depth gradient in the downstream direction. This means that instead of using bed slope in Manning's equation or the law of the wall, the water-surface slope is used. | ||
now be used as a stand-alone model. It uses the "diffusive wave" | |||
method to compute flow velocities for all of the channels in a | |||
D8-based river network. This method includes a pressure gradient | |||
term that is induced by a water-depth gradient in the downstream | |||
direction. This means that instead of using bed slope in Manning's | |||
equation or the law of the wall, the water-surface slope is used. | |||
}} | }} | ||
{{Model technical information | {{Model technical information | ||
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These inputs must be provided as grids: | These inputs must be provided as grids: | ||
*flow_codes = D8 flow codes (Jenson 1984 convention), | *flow_codes = D8 flow codes (Jenson 1984 convention), | ||
* [NE,E,SE,S,SW,W,NW,N] → [1,2,4,8,16,32,64,128] | |||
*bed_slope = slope of the channel bed or hillslope [m / m] | *bed_slope = slope of the channel bed or hillslope [m / m] | ||
*Manning_n = Manning roughness parameter [s / m^(1/3)] | *Manning_n = Manning roughness parameter [s / m^(1/3)] | ||
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These inputs can be provided as scalars or grids: | These inputs can be provided as scalars or grids: | ||
*sinuosity = channel sinuosity [ | *sinuosity = channel sinuosity [m/m] (along-channel / straight length) | ||
*init_depth = initial water depth [m] (See HTML help) | *init_depth = initial water depth [m] (See HTML help) | ||
Grids must be saved in binary files with no header. All variables | Grids must be saved in binary files with no header. All variables should be stored as 4-byte, floating-point numbers (IEEE standard) except flow codes, which are unsigned, 1-byte integers. | ||
should be stored as 4-byte, floating-point numbers (IEEE standard) | |||
except flow codes, which are unsigned, 1-byte integers. | |||
Here is a sample configuration (CFG) file for this component: | Here is a sample configuration (CFG) file for this component: |
Revision as of 00:14, 16 February 2010
Contact
Name | Scott Peckham |
Type of contact | Model developer |
Institute / Organization | CSDMS, INSTAAR, University of Colorado |
Postal address 1 | 1560 30th street |
Postal address 2 | |
Town / City | Boulder |
Postal code | 80305 |
State | Colorado |
Country | USA"USA" is not in the list (Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, ...) of allowed values for the "Country" property. |
Email address | Scott.Peckham@colorado.edu |
Phone | 303-492-6752 |
Fax |
TopoFlow-Channels-Diffusive Wave
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