Effective Air Flow Heights
- Author: J.Boehner, O.Conrad (c) 2008
- Menu: Terrain Analysis | Climate and Weather
Description
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.
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 number | LEN_SCALE | - | Default: 1.000000 |
| Search Distance [km] | floating point number | MAXDIST | - | Minimum: 0.000000
Default: 300.000000 |
| Constant Wind Direction | floating point number | 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 number | 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 number | LEE | - | Default: 0.500000 |
| Luv Factor | floating point number | LUV | - | Default: 3.000000 |
Command Line
Usage: saga_cmd ta_morphometry 11 [-DEM ] [-DIR ] [-DIR_UNITS ] [-LEN ] [-LEN_SCALE ] [-AFH ] [-MAXDIST ] [-DIR_CONST ] [-OLDVER ] [-ACCEL ] [-PYRAMIDS ] [-LEE ] [-LUV ]
-DEM: Elevation
grid, input
-DIR: Wind Direction
grid, input, optional
-DIR_UNITS: Wind Direction Units
choice
Available Choices:
[0] radians
[1] degree
Default: 0
-LEN: Wind Speed
grid, input, optional
-LEN_SCALE: Scaling
floating point number
Default: 1.000000
-AFH: Effective Air Flow Heights
grid, output
-MAXDIST: Search Distance [km]
floating point number
Minimum: 0.000000
Default: 300.000000
-DIR_CONST: Constant Wind Direction
floating point number
Default: 135.000000
-OLDVER: Old Version
boolean
Default: 0
-ACCEL: Acceleration
floating point number
Minimum: 1.000000
Default: 1.500000
-PYRAMIDS: Elevation Averaging
boolean
Default: 0
-LEE: Windward Factor
floating point number
Default: 0.500000
-LUV: Luv Factor
floating point number
Default: 3.000000