WMS:MWBM Delineate Watershed: Difference between revisions
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== Help == | == Help == | ||
'''Compute flow directions/accumulations using TauDEM or TOPAZ''' – Select this button to compute flow directions and accumulations on the DEM while delineating the watershed. If the outlet is not in a flow accumulation cell, you will need to move the outlet, and run the delineate watershed command again. If you have flow directions and accumulations already computed, unselect this button before delineating the watersheds to save computation time. | '''Compute flow directions/accumulations using TauDEM or TOPAZ''' – Select this button to compute flow directions and accumulations on the DEM while delineating the watershed. If the outlet is not in a flow accumulation cell, you will need to move the outlet, and run the delineate watershed command again. If you have flow directions and accumulations already computed, unselect this button before delineating the watersheds to save computation time. The user may select to use either [http://hydrology.usu.edu/taudem/taudem5/index.html TauDEM] (Terrain Analysis Using Digital Elevation Models) or [[WMS:TOPAZ|TOPAZ]] (Topographic Parameterization Program) to calculate flows. | ||
'''Stream threshold value''' – This value is used to modify the stream density. Lower values will cause the streams to be more dense while higher values will create fewer streams in the completed model. | '''Stream threshold value''' – This value is used to modify the stream density. Lower values will cause the streams to be more dense while higher values will create fewer streams in the completed model. | ||
Revision as of 00:17, 3 February 2016
The Delineate Watershed step is used to delineate a watershed.
Help
Compute flow directions/accumulations using TauDEM or TOPAZ – Select this button to compute flow directions and accumulations on the DEM while delineating the watershed. If the outlet is not in a flow accumulation cell, you will need to move the outlet, and run the delineate watershed command again. If you have flow directions and accumulations already computed, unselect this button before delineating the watersheds to save computation time. The user may select to use either TauDEM (Terrain Analysis Using Digital Elevation Models) or TOPAZ (Topographic Parameterization Program) to calculate flows.
Stream threshold value – This value is used to modify the stream density. Lower values will cause the streams to be more dense while higher values will create fewer streams in the completed model.
Apply to Display – Select this button to apply the stream threshold value entered to the display.
Create Tc Coverage – If this toggle is selected, a Time Computation coverage containing an arc with the longest flow path is created after delineating the watershed and sub-basins.
Units – This button is used to define the model and computation coordinates and units. A user can turn on the option to create a Tc coverage and change which data is computed by selecting the Drain Data Compute Opts... button in the Units dialog.
After delineating a watershed, it is possible to manually edit the extents of the watershed.
WMS – Watershed Modeling System | ||
|---|---|---|
| Modules: | Terrain Data • Drainage • Map • Hydrologic Modeling • River • GIS • 2D Grid • 2D Scatter |  |
| Models: | CE-QUAL-W2 • GSSHA • HEC-1 • HEC-HMS • HEC-RAS • HSPF • MODRAT • NSS • OC Hydrograph • OC Rational • Rational • River Tools • Storm Drain • SMPDBK • SWMM • TR-20 • TR-55 | |
| Toolbars: | Modules • Macros • Units • Digitize • Static Tools • Dynamic Tools • Drawing • Get Data Tools | |
| Aquaveo | ||
