Tool Isochrones Variable Speed (interactive)
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.
References
- Al-Smadi, Mohammad (1998): Incorporating spatial and temporal variation of watershed response in a gis-based hydrologic model. Faculty of the Virginia Polythecnic Insitute and State University. MsC Thesis. online.
- (): .
- Olaya, V. (2004): Hidrologia computacional y modelos digitales del terreno. Alqua. 536 pp.
- Author: V.Olaya (c) 2004, V.Wichmann (c) 2015
- Menu: Terrain Analysis|Hydrology|Dynamics
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | Grid (input) | DEM | - | - |
| Slope | Grid (input) | SLOPE | - | - |
| Catchment Area | Grid (input) | FLOWACC | - | - |
| Curve Number (*) | Grid (optional input) | CN | - | - |
| Manning's N (*) | Grid (optional input) | MANNING | - | - |
| Output | Time Out(h) | Grid (output) | TIME | - | - |
| Speed (m/s) | Grid (output) | SPEED | - | - |
| Options | Grid system | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Avg. Manning's N | Floating point | AVGMANNING | - | Default: 0.150000 |
| Avg. Curve Number | Floating point | AVGCN | - | Default: 75.000000 |
| Mixed Flow Threshold (ha) | Floating point | THRSMIXED | - | Default: 18.000000 |
| Channel Definition Threshold (ha) | Floating point | THRSCHANNEL | - | Default: 360.000000 |
| Avg. Rainfall Intensity (mm/h) | Floating point | AVGRAINFALL | - | Default: 1.000000 |
| Channel side slope(m/m) | Floating point | CHANSLOPE | - | Default: 0.500000 |
| Min. Flow Speed (m/s) | Floating point | MINSPEED | - | Default: 0.050000 |
| (*) optional |
Command-line
this interactive tool can not be executed.