Browse wiki
From CSDMS
Linkages Supported: Links to GLUE (Generalized Likelihood Uncertainty Estimation) program for sensitivity/uncertainty/calibration analyses. +
No but possible +
No but possible +
No but possible +
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>.
16:25:47, 19 November 2009 +
TOPMODEL calibration procedures are relati … TOPMODEL calibration procedures are relatively simple because it uses very few parameters in the model formulas. The model is very sensitive to changes of the soil hydraulic conductivity decay parameter, the soil transmissivity at saturation, the root zone storage capacity, and the channel routing velocity in larger watersheds. The calibrated values of parameters are also related to the grid size used in the digital terrain analysis. The timestep and the grid size also have been shown to influence TOPMODEL simulations.n shown to influence TOPMODEL simulations. +
Example of TOPMODEL simulation +
Model Inputs:
* Project file: Text descrip … Model Inputs:</br>* Project file: Text description of application and input file names and paths. </br>* Catchment (watershed) data file: Watershed and subwatershed topographic index—ln(a/tan B) distributions and the following parameters: </br>** The mean soil surface transmissivity </br>** A transmissivity profile decay coefficient </br>** A root zone storage capacity </br>** An unsaturated zone time delay </br>** A main channel routing velocity and internal subwatershed routing velocity </br>To use the infiltration excess mechanism, a hydraulic conductivity (or distribution), a wetting front suction and the initial near surface water content should be added. </br></br>The initialization of each run requires an initial stream discharge and the root zone deficit. </br>* Hydrological input data file: rainfall, potential evapotranspiration, and observed discharge time series in m/h </br>* Topographic index map data file: the topographic index map may be prepared from a raster digital elevation file using the DTM-ANALYSIS program. This file includes number of pixels in X direction, number of pixels in Y direction, grid size, and topographic index values for each pair of X and Y.hic index values for each pair of X and Y. +
see the discussion of limitations in Beven et al., 1995 and Beven, 1997.
Grid or subwatersheds +
Model Limitations
* TOPMODEL only simulat … Model Limitations </br>* TOPMODEL only simulates watershed hydrology, although studies have been conducted to modify it to </br>simulate water quality dynamics. </br>* TOPMODEL can be applied most accurately to watersheds that do not suffer from excessively long dry </br>periods and have shallow homogeneous soils and moderate topography. </br>* Model results are sensitive to grid size, and grid size <=50 m is recommended.size, and grid size <=50 m is recommended. +
Model Interface Capabilities:
There are th … Model Interface Capabilities:</br>There are three options available in the program interface: </br>* The Hydrograph Prediction Option: This option allows the model to be run and hydrographs displayed. If a Topographic Index Map File is available, then a map button is displayed that allows the display of predicted simulation, either as a summary over all timesteps or animated. </br>* The Sensitivity Analysis Option: This screen allows the sensitivity of the objective functions to changes of one or more of the parameters to be explored. </br>* The Monte Carlo Analysis Option: In this option a large number of runs of the model can be made using uniform random samples of the parameters chosen for inclusion in the analysis. Check boxes can be used to choose the variables and objective functions to be saved for each run. The results file produced will be compatible with the GLUE analysis software package.e with the GLUE analysis software package. +
TOPMODEL is integrated in GRASS GIS version 5. TOPSIMPL, another Windows version of the model written by Georges-Marie Saulnier can be downloaded directly from the main TOPMODEL site +
TOPMODEL is defined as a variable contribu … TOPMODEL is defined as a variable contributing area conceptual model in which the dynamics of surface and subsurface saturated areas is estimated on the basis of storage discharge relationships established from a simplified steady state theory for downslope saturated zone flows. The theory assumes that the local hydraulic gradient is equal to the local surface slope and implies that all points with the same value of the topographic index, a/tan B will respond in a hydrologically similar way. This index is derived from the basin topography, where a is the drained area per unit contour length and tan B is the slope of the ground surface at the location. Thus the model need make calculations only for representative values of the index. The results may then be mapped back into space by knowledge of the pattern of the index derived from a topographic analysis.index derived from a topographic analysis. +
see the discussion of limitations in Beven et al., 1995 and Beven, 1997.
Variable, from 1 to 24 hours +
Active +
TOPMODEL is a physically based, distribute … TOPMODEL is a physically based, distributed watershed model that simulates hydrologic fluxes of water (infiltration-excess overland flow, saturation overland flow, infiltration, exfiltration, subsurface flow, evapotranspiration, and channel routing) through a watershed. The model simulates explicit groundwater/surface water interactions by predicting the movement of the water table, which determines where saturated land-surface areas develop and have the potential to produce saturation overland flow.ntial to produce saturation overland flow. +
Keith +
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>.
Lancaster University, Department of Environmental Science, Institute of Environmental and Natural Sciences +
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>.
2.17 +
physically +, based +, distributed +, watershed +, infiltration-excess overland flow +, saturation overland flow +, distributed watershed model +, overland flow +, simulates hydrologic fluxes +, subsurface flow +, physically based +, channel routing +, distributed watershed +, infiltration-excess overland +, saturation overland +, produce saturation overland +, hydrologic fluxes +, flow +, model simulates explicit +, basin +, hydrological + and topmodel +
As code +
Media:TOPMODEL Example.zip +
Modular +
https://cran.r-project.org/package=topmodel +
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>.
02:17:22, 17 September 2020 +
569 +
Physically based, distributed watershed model that simulates hydrologic fluxes of water through a watershed +
LA1 4YQ +
false +
Visual Basic +
Other +
NOT SURE +
Fortran77 +
Minutes +
Through web repository +
https://cran.r-project.org/package=topmodel +
1974 +
Windows +
Model developer +
