Module Upslope and Downslope Curvature
Calculates the local curvature of a cell as sum of the gradients to its neighbour cells. Upslope curvature is the distance weighted average local curvature in a cell's upslope contributing area based on multiple flow direction after Freeman 1994.
References:
- Freeman, G.T. (1991): Calculating catchment area with divergent flow based on a regular grid. Computers and Geosciences, 17:413-22
- Author: P.Gandelli, O.Conrad (c) 2015
- Specification: grid
- Menu: Terrain Analysis|Morphometry
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | Grid (input) | DEM | - | - |
| Output | Local Curvature | Grid (output) | C_LOCAL | - | - |
| Upslope Curvature | Grid (output) | C_UP | - | - |
| Local Upslope Curvature | Grid (output) | C_UP_LOCAL | - | - |
| Downslope Curvature | Grid (output) | C_DOWN | - | - |
| Local Downslope Curvature | Grid (output) | C_DOWN_LOCAL | - | - |
| Options | Upslope Weighting | Floating point | WEIGHTING | - | Minimum: 0.000000
Maximum: 1.000000
Default: 0.500000 |
Command-line
Usage: saga_cmd ta_morphometry 26 [-DEM <str>] [-C_LOCAL <str>] [-C_UP <str>] [-C_UP_LOCAL <str>] [-C_DOWN <str>] [-C_DOWN_LOCAL <str>] [-WEIGHTING <str>]
-DEM:<str> Elevation
Grid (input)
-C_LOCAL:<str> Local Curvature
Grid (output)
-C_UP:<str> Upslope Curvature
Grid (output)
-C_UP_LOCAL:<str> Local Upslope Curvature
Grid (output)
-C_DOWN:<str> Downslope Curvature
Grid (output)
-C_DOWN_LOCAL:<str> Local Downslope Curvature
Grid (output)
-WEIGHTING:<str> Upslope Weighting
Floating point
Minimum: 0.000000
Maximum: 1.000000
Default: 0.500000