Tool Wind Shelter Index
This tool reimplements the Wind Shelter Index proposed by Plattner et al. (2004), that has originally been implemented within the RSAGA package.
References
- Plattner, C., Braun, L.N., Brenning, A. (2004): Spatial variability of snow accumulation on Vernagtferner, Austrian Alps, in winter 2003/2004. Zeitschrift fuer Gletscherkunde und Glazialgeologie, 39: 43-57. [PDF] academia.edu.
- Winstral, A., Elder, K., Davis, R.E. (2002): Spatial snow modeling of wind-redistributed snow using terrain-based parameters. Journal of Hydrometeorology, 3: 524-538. [PDF] ametsoc.org.
- Author: O.Conrad (c) 2019
- Menu: Terrain Analysis|Climate and Weather
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | Grid (input) | ELEVATION | - | - |
| Output | Wind Shelter Index | Grid (output) | SHELTER | - | - |
| Options | Grid System | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Wind Direction | Floating point | DIRECTION | The direction [degree] into which the wind blows. | Default: 135.000000 |
| Tolerance | Floating point | TOLERANCE | The tolerance angle [degree] to the left and right of the direction angle. | Minimum: 0.000000
Maximum: 90.000000
Default: 5.000000 |
| Distance | Floating point | DISTANCE | [cells] | Minimum: 1.000000
Default: 5.000000 |
| Quantile | Floating point | QUANTILE | Set quantile to one to get the maximum slope angle. | Minimum: 0.000000
Maximum: 1.000000
Default: 1.000000 |
| Include Negative Slopes | Boolean | NEGATIVES | - | Default: 0 |
| Method | Choice | METHOD | - | Available Choices:
[0] windward
[1] leeward
Default: 0 |
Command-line
Usage: saga_cmd ta_morphometry 29 [-ELEVATION <str>] [-SHELTER <str>] [-DIRECTION <double>] [-TOLERANCE <double>] [-DISTANCE <double>] [-QUANTILE <double>] [-NEGATIVES <str>] [-METHOD <str>]
-ELEVATION:<str> Elevation
Grid (input)
-SHELTER:<str> Wind Shelter Index
Grid (output)
-DIRECTION:<double> Wind Direction
Floating point
Default: 135.000000
-TOLERANCE:<double> Tolerance
Floating point
Minimum: 0.000000
Maximum: 90.000000
Default: 5.000000
-DISTANCE:<double> Distance
Floating point
Minimum: 1.000000
Default: 5.000000
-QUANTILE:<double> Quantile
Floating point
Minimum: 0.000000
Maximum: 1.000000
Default: 1.000000
-NEGATIVES:<str> Include Negative Slopes
Boolean
Default: 0
-METHOD:<str> Method
Choice
Available Choices:
[0] windward
[1] leeward
Default: 0