Downslope Distance Gradient

Author: O.Conrad (c) 2006
Menu: Terrain Analysis | Morphometry

Description

Calculation of a new topographic index to quantify downslope controls on local drainage.

References

Hjerdt, K.N., McDonnell, J.J., Seibert, J. Rodhe, A. (2004): A new topographic index to quantify downslope controls on local drainage.. Water Resources Research, 40. doi:10.1029/2004WR003130.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Elevation	grid, input	`DEM`	-	-
Output	Gradient	grid, output	`GRADIENT`	-	-
Output	Gradient Difference	grid, output, optional	`DIFFERENCE`	Difference to local gradient.	-
Options	Grid System	grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Vertical Distance	floating point number	`DISTANCE`	-	Minimum: 0.000000 Default: 10.000000
	Output	choice	`OUTPUT`	-	Available Choices: [0] distance [1] gradient (tangens) [2] gradient (degree) Default: 2

Command Line

Usage: saga_cmd ta_morphometry 9 [-DEM ] [-GRADIENT ] [-DIFFERENCE ] [-DISTANCE ] [-OUTPUT ]
  -DEM:        	Elevation
	grid, input
  -GRADIENT:   	Gradient
	grid, output
  -DIFFERENCE: 	Gradient Difference
	grid, output, optional
  -DISTANCE:	Vertical Distance
	floating point number
	Minimum: 0.000000
	Default: 10.000000
  -OUTPUT:     	Output
	choice
	Available Choices:
	[0] distance
	[1] gradient (tangens)
	[2] gradient (degree)
	Default: 2