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About this component:
*This component was … About this component:</br>*This component was developed as part of the TopoFlow hydrologic model, which was originally written in IDL and had a point-and-click GUI. For more information on TopoFlow, please goto: https://csdms.colorado.edu/wiki/Model:TopoFlow.</br>*When used from within the CSDMS Modeling Tool (CMT), this component has "config" button which launches a graphical user interface (GUI) for changing input parameters. The GUI is a tabbed dialog with a Help button at the bottom that displays HTML help in a browser window.</br>*This component also has a configuration (CFG) file, with a name of the form: <case_prefix>_channels_diff_wave.cfg. This file can be edited with a text editor.</br>*The Numerical Python module (numpy) is used for fast, array-based processing.</br>*This model has an OpenMI-style interface, similar to OpenMI 2.0. Part of this interface is inherited from "CSDMS_base.py".his interface is inherited from "CSDMS_base.py". +
Yes +
No but planned +
Single Processor +
Creation date"Creation date" is a predefined property that corresponds to the date of the first revision of a subject and is provided by <a target="_blank" rel="nofollow noreferrer noopener" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
22:30:58, 17 February 2010 +
Collaborators include: Larry Hinzman (UAF), Bob Bolton, Anna Liljedahl (UAF), Stefan Pohl and others +
This model/component is typically not calibrated to fit data, but is run with a best guess or measured value for each input parameter. +
Available test data sets:
*Treynor watersh … Available test data sets:</br>*Treynor watershed, in the Nishnabotna River basin, Iowa, USA.</br>* (Two large rainfall events.)</br>*Small basin in Kentucky.</br>*Inclined plane for testing.</br>*Arctic watershed data from Larry Hinzman (UAF).</br>*See /data/progs/topoflow/3.0/data on CSDMS cluster./progs/topoflow/3.0/data on CSDMS cluster. +
Several test datasets are stored on the CSDMS cluster at: /data/progs/topoflow/3.0/data. +
The input variables for modeling the net f … The input variables for modeling the net flux of shortwave radiation are defined as follows:</br> Tair = air temperature (deg C)</br> RH = relative humidity (unitless) (in (0,1))</br> albedo = surface albedo (unitless) (in (0,1))</br> dust att. = dust attenuation factor (unitless) (in (0,1))</br> factor = cloud or canopy cover factor (unitless) (in (0,1))</br> slope = topographic slope (unitless, m/m) (in (0,Infinity))</br> aspect = aspect angle (radians) (in (0,1)) </br></br>The behavior of this component is controlled with a configuration (CFG) file, which may point to other files that contain input data. Here is a sample configuration (CFG) file for this component:</br> Method code: 1</br> Method name: Standard</br> Time step: Scalar 3600.0 (sec)</br> rho_H2O: Scalar 1000.00000000 (kg/m^3)</br> Cp_air: Scalar 1005.70001221 (J/kg/K)</br> rho_air: Scalar 1.26139998 (kg/m^3)</br> P: Time_series Case5_rain_rates.txt (mm/hr)</br> T_air: Scalar 20.00000000 (deg C)</br> T_surf: Scalar -5.00000000 (deg C)</br> RH: Scalar 0.50000000 (none)</br> p0: Scalar 1000.00000000 (mbar)</br> uz: Scalar 3.00000000 (m/s)</br> z: Scalar 10.00000000 (m)</br> z0_air: Scalar 0.02000000 (m)</br> Qn_SW: Scalar 100.00000000 (W/m^2)</br> Qn_LW: Scalar 10.00000000 (W/m^2)</br> Save grid timestep: Scalar 60.00000000 (sec)</br> Save ea grids: 0 Case5_2D-ea.rts (mbar)</br> Save es grids: 0 Case5_2D-es.rts (mbar)</br> Save pixels timestep: Scalar 60.00000000 (sec)</br> Save ea pixels: 0 Case5_0D-ea.txt (mbar)</br> Save es pixels: 0 Case5_0D-es.txt (mbar) Case5_0D-es.txt (mbar)
Recommended grid cell size is around 100 meters, but can be parameterized to run with a wide range of grid cell sizes. DEM grid dimensions are typically less than 1000 columns by 1000 rows. +
This model/component needs more rigorous testing. +
None, except visualization software. Grid sequences saved in netCDF files can be viewed as animations and saved as movies using VisIt. +
Another program must be used to create the input grids. This includes a D8 flow grid derived from a DEM for the region to be modeled. The earlier, IDL version of TopoFlow can be used to create some of these. +
The basic stability condition is: dt < … The basic stability condition is: dt < (dx / u_min), where dt is the timestep, dx is the grid cell size and u_min is the smallest velocity in the grid. This ensures that flow cannot cross a grid cell in less than one time step. Typical timesteps are on the order of seconds to minutes. Model can be run for a full year or longer, if necessary. run for a full year or longer, if necessary. +
Active +
This process component is part of a spatially-distributed hydrologic model called TopoFlow, but it can now be used as a stand-alone model. +
Scott +
Has query"Has query" is a predefined property that represents meta information (in form of a <a target="_blank" rel="nofollow noreferrer noopener" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a target="_blank" rel="nofollow noreferrer noopener" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
Last editor is"Last editor is" is a predefined property that contains the page name of the user who created the last revision and is provided by <a target="_blank" rel="nofollow noreferrer noopener" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
0.06 +
Standard +
Hydrology +
meteorology +, spatial +, model +, model called topoflow +, spatially-distributed hydrologic model +, hydrologic model called +, called topoflow +, process component +, component is part +, spatially-distributed hydrologic +, hydrologic model +, model called +, stand-alone model +, topoflow +, process +, component +, part +, basins + and topoflow-meteorology +
basins +
Single +
This site. +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a target="_blank" rel="nofollow noreferrer noopener" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
16:35:40, 6 June 2025 +
1 +
Meteorology process component for a D8-based, spatial hydrologic model +
1560 30th street +
80305 +
true +
None (but uses NumPy package) +
Apache public license +
Python +
Minutes to hours +
Through web repository +
https://github.com/peckhams/topoflow +
2001 +
Model developer +
