Module Downslope Distance Gradient
Calculation of a new topographic index to quantify downslope controls on local drainage.
References:
- Hjerdt, K.N., McDonnell, J.J., Seibert, J. Rodhe, A. (2004): 'A new topographic index to quantify downslope controls on local drainage', Water Resources Research, 40
- Author: (c) 2006 by O.Conrad
- Menu: Terrain Analysis|Morphometry
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | Grid (input) | DEM | - | - |
| Output | Gradient | Grid (output) | GRADIENT | - | - |
| Gradient Difference (*) | Grid (optional output) | DIFFERENCE | Difference to local gradient. | - |
| Options | Grid system | Grid system | PARAMETERS_GRID_SYSTEM | Grid system | - |
| Vertical Distance | Floating point | DISTANCE | - | Minimum: 0.000000
Default: 10.000000 |
| Output | Choice | OUTPUT | - | Available Choices:
[0] distance
[1] gradient (tangens)
[2] gradient (degree)
Default: 2 |
| (*) optional |
Command-line
Usage: saga_cmd ta_morphometry 9 [-DEM <str>] [-GRADIENT <str>] [-DIFFERENCE <str>] [-DISTANCE <double>] [-OUTPUT <str>]
-DEM:<str> Elevation
Grid (input)
-GRADIENT:<str> Gradient
Grid (output)
-DIFFERENCE:<str> Gradient Difference
Grid (optional output)
-DISTANCE:<double> Vertical Distance
Floating point
Minimum: 0.000000
Default: 10.000000
-OUTPUT:<str> Output
Choice
Available Choices:
[0] distance
[1] gradient (tangens)
[2] gradient (degree)
Default: 2