Isochrones Constant Speed

Author: V.Olaya (c) 2004, V.Wichmann (c) 2015
Menu: Terrain Analysis | Hydrology | Dynamics

Description

Isochrones calculation with constant speed based on a user provided Time of Concentration. For each selected pour point, the longest watercourse length and the average slope of the watercourse are reported. These can be used to estimate the Time of Concentration with one of the empirical equations available.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Elevation Grid	grid, input	`DEM`	-	-
Output	Time Out [min]	grid, output	`TIME`	-	-
Options	Grid System	grid system	`PARAMETERS_GRID_SYSTEM`	-	-
Options	Time of Concentration [min]	floating point number	`TIME_OF_CONCENTRATION`	Time of Concentration [min] used to estimate flow speed.	Minimum: 0.001000 Default: 60.000000

Command Line

Usage: saga_cmd ta_hydrology 8 [-DEM ] [-TIME ] [-TIME_OF_CONCENTRATION ]
  -DEM:                     	Elevation Grid
	grid, input
  -TIME:                    	Time Out [min]
	grid, output
  -TIME_OF_CONCENTRATION:	Time of Concentration [min]
	floating point number
	Minimum: 0.001000
	Default: 60.000000