Tool Effective Air Flow Heights
Effective Air Flow Heights
References
- Boehner, J., & Antonic, O. (2009): Land-surface parameters specific to topo-climatology. In: Hengl, T., & Reuter, H. (Eds.): Geomorphometry - Concepts, Software, Applications. Developments in Soil Science, Volume 33, p.195-226, Elsevier. doi:10.1016/S0166-2481(08)00008-1.
- Author: J.Boehner, O.Conrad (c) 2008
- Menu: Terrain Analysis|Climate and Weather
Parameters
| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | Grid, input | DEM | - | - |
| Wind Direction (*) | Grid, input, optional | DIR | Direction into which the wind blows, starting with 0 for North and increasing clockwise. | - |
| Wind Speed (*) | Grid, input, optional | LEN | - | - |
| Output | Effective Air Flow Heights | Grid, output | AFH | - | - |
| Options | Grid System | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Wind Direction Units | Choice | DIR_UNITS | - | Available Choices:
[0] radians
[1] degree
Default: 0 |
| Scaling | Floating point | LEN_SCALE | - | Default: 1.000000 |
| Search Distance [km] | Floating point | MAXDIST | - | Minimum: 0.000000
Default: 300.000000 |
| Constant Wind Direction | Floating point | DIR_CONST | constant direction into the wind blows, given as degree | Default: 135.000000 |
| Old Version | Boolean | OLDVER | use old version for constant wind direction (no acceleration and averaging option) | Default: 0 |
| Acceleration | Floating point | ACCEL | - | Minimum: 1.000000
Default: 1.500000 |
| Elevation Averaging | Boolean | PYRAMIDS | use more averaged elevations when looking at increasing distances | Default: 0 |
| Windward Factor | Floating point | LEE | - | Default: 0.500000 |
| Luv Factor | Floating point | LUV | - | Default: 3.000000 |
| (*) optional |
Command-line
Usage: saga_cmd ta_morphometry 11 [-DEM <str>] [-DIR <str>] [-DIR_UNITS <str>] [-LEN <str>] [-LEN_SCALE <double>] [-AFH <str>] [-MAXDIST <double>] [-DIR_CONST <double>] [-OLDVER <str>] [-ACCEL <double>] [-PYRAMIDS <str>] [-LEE <double>] [-LUV <double>]
-DEM:<str> Elevation
Grid, input
-DIR:<str> Wind Direction
Grid, input, optional
-DIR_UNITS:<str> Wind Direction Units
Choice
Available Choices:
[0] radians
[1] degree
Default: 0
-LEN:<str> Wind Speed
Grid, input, optional
-LEN_SCALE:<double> Scaling
Floating point
Default: 1.000000
-AFH:<str> Effective Air Flow Heights
Grid, output
-MAXDIST:<double> Search Distance [km]
Floating point
Minimum: 0.000000
Default: 300.000000
-DIR_CONST:<double> Constant Wind Direction
Floating point
Default: 135.000000
-OLDVER:<str> Old Version
Boolean
Default: 0
-ACCEL:<double> Acceleration
Floating point
Minimum: 1.000000
Default: 1.500000
-PYRAMIDS:<str> Elevation Averaging
Boolean
Default: 0
-LEE:<double> Windward Factor
Floating point
Default: 0.500000
-LUV:<double> Luv Factor
Floating point
Default: 3.000000