Isochrones Constant Speed
- Author: V.Olaya (c) 2004, V.Wichmann (c) 2015
- Menu: Terrain Analysis | Hydrology | Dynamics
Description
Isochrones calculation with constant speed based on a user provided Time of Concentration. For each selected pour point, the longest watercourse length and the average slope of the watercourse are reported. These can be used to estimate the Time of Concentration with one of the empirical equations available.
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation Grid | grid, input | DEM | - | - |
| Output | Time Out [min] | grid, output | TIME | - | - |
| Options | Grid System | grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Time of Concentration [min] | floating point number | TIME_OF_CONCENTRATION | Time of Concentration [min] used to estimate flow speed. | Minimum: 0.001000
Default: 60.000000 |
Command Line
Usage: saga_cmd ta_hydrology 8 [-DEM ] [-TIME ] [-TIME_OF_CONCENTRATION ]
-DEM: Elevation Grid
grid, input
-TIME: Time Out [min]
grid, output
-TIME_OF_CONCENTRATION: Time of Concentration [min]
floating point number
Minimum: 0.001000
Default: 60.000000