Wind Shelter Index
- Author: O.Conrad (c) 2019
- Menu: Terrain Analysis | Climate and Weather
Description
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 at 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. doi:10.1175/1525-7541(2002)003%3C0524:SSMOWR%3E2.0.CO;2.
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 | - | - |
| Unit | choice | UNIT | - | Available Choices:
[0] degree
[1] radians
Default: 0 |
| Wind Direction | floating point number | DIRECTION | The direction [degree] into which the wind blows. | Default: 135.000000 |
| Tolerance | floating point number | 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 number | DISTANCE | [cells] | Minimum: 1.000000
Default: 5.000000 |
| Quantile | floating point number | 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 ] [-SHELTER ] [-UNIT ] [-DIRECTION ] [-TOLERANCE ] [-DISTANCE ] [-QUANTILE ] [-NEGATIVES ] [-METHOD ]
-ELEVATION: Elevation
grid, input
-SHELTER: Wind Shelter Index
grid, output
-UNIT: Unit
choice
Available Choices:
[0] degree
[1] radians
Default: 0
-DIRECTION: Wind Direction
floating point number
Default: 135.000000
-TOLERANCE: Tolerance
floating point number
Minimum: 0.000000
Maximum: 90.000000
Default: 5.000000
-DISTANCE: Distance
floating point number
Minimum: 1.000000
Default: 5.000000
-QUANTILE: Quantile
floating point number
Minimum: 0.000000
Maximum: 1.000000
Default: 1.000000
-NEGATIVES: Include Negative Slopes
boolean
Default: 0
-METHOD: Method
choice
Available Choices:
[0] windward
[1] leeward
Default: 0