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.

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 (optional input)	`DIR`	Direction into which the wind blows, starting with 0 for North and increasing clockwise.	-
	Wind Speed (*)	Grid (optional input)	`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 (optional input)
  -DIR_UNITS:<str>   	Wind Direction Units
	Choice
	Available Choices:
	[0] radians
	[1] degree
	Default: 0
  -LEN:<str>         	Wind Speed
	Grid (optional input)
  -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