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.
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 Insitute and State University. MsC Thesis. online.
- Martínez Álvarez, V.; Dal-Ré Tenreiro, R.; García García, A. I.; Ayuga Téllez, F. (): Modelación distribuida de la escorrentía superficial en pequeñas cuencas mediante SIG. Evaluación experimental.
- 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, input, optional | CN | - | - |
Manning's N (*) | Grid, input, optional | 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.