Isochrones Variable Speed
| Author(s) | V.Olaya (c) 2004, V.Wichmann (c) 2015 |
| Library ID | ta_hydrology |
| Tool ID | 9 |
| Version | 1.0 |
| Menu | Terrain Analysis | Hydrology | Dynamics |
Description
Calculation of isochrones with variable speed.
In case a cell in an optional input grid is NoData, the corresponding parameter value will be used instead of skipping this cell.
This is the interactive tool version, where a left mouse click will trigger the calculation for the selected cell.
References
Al-Smadi, Mohammad (1998): Incorporating spatial and temporal variation of watershed response in a gis-based hydrologic model. Faculty of the Virginia Polythecnic Institute and State University. MSc Thesis. online
MartÃnez Ãlvarez, V.; Dal-Ré Tenreiro, R.; GarcÃa GarcÃa, A. I.; Ayuga Téllez, F. (n.d.): Modelación distribuida de la escorrentÃa superficial en pequeñas cuencas mediante SIG. Evaluación experimental.
Olaya, V. (2004): Hidrologia computacional y modelos digitales del terreno. Alqua. 536 pp.
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | grid, input | DEM | - | - |
| Slope | grid, input | SLOPE | - | - |
| Catchment Area | grid, input | FLOWACC | - | - |
| Curve Number | grid, input, optional | CN | - | - |
| Manning's N | grid, input, optional | MANNING | - | - |
| Output | Time Out(h) | grid, output | TIME | - | - |
| Speed (m/s) | grid, output | SPEED | - | - |
| Options | Avg. Manning's N | floating point number | AVGMANNING | - | Default: 0.15 |
| Avg. Curve Number | floating point number | AVGCN | - | Default: 75 |
| Mixed Flow Threshold (ha) | floating point number | THRSMIXED | - | Default: 18 |
| Channel Definition Threshold (ha) | floating point number | THRSCHANNEL | - | Default: 360 |
| Avg. Rainfall Intensity (mm/h) | floating point number | AVGRAINFALL | - | Default: 1 |
| Channel side slope(m/m) | floating point number | CHANSLOPE | - | Default: 0.5 |
| Min. Flow Speed (m/s) | floating point number | MINSPEED | - | Default: 0.05 |
Command Line
This tool is not intended to be run from the command line!