Tool Flow Width and Specific Catchment Area

Flow width and specific catchment area (SCA) calculation. SCA calculation needs total catchment area (TCA) as input, which can be calculated with one of the flow accumulation tools.

References

Gruber, S., Peckham, S. (2008): Land-Surface Parameters and Objects in Hydrology. In: Hengl, T. and Reuter, H.I. [Eds.]: Geomorphometry: Concepts, Software, Applications. Developments in Soil Science, Elsevier, 33:293-308. https://www.elsevier.com/books/geomorphometry/hengl/978-0-12-374345-9.
Quinn, P.F., Beven, K.J., Chevallier, P., Planchon, O. (1991): The prediction of hillslope flow paths for distributed hydrological modelling using digital terrain models. Hydrological Processes, 5:59-79 http://onlinelibrary.wiley.com/doi/10.1002/hyp.3360050106/full.

Author: O.Conrad (c) 2009
Menu: Terrain Analysis|Hydrology|Flow Accumulation

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Elevation	Grid, input	`DEM`	-	-
Input	Total Catchment Area (TCA) (*)	Grid, input, optional	`TCA`	-	-
Output	Flow Width	Grid, output	`WIDTH`	-	-
Output	Specific Catchment Area (SCA)	Grid, output	`SCA`	-	-
Options	Grid System	Grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Coordinate Unit	Choice	`COORD_UNIT`	-	Available Choices: [0] meter [1] feet Default: 0
	Method	Choice	`METHOD`	-	Available Choices: [0] Deterministic 8 [1] Multiple Flow Direction (Quinn et al. 1991) [2] Aspect Default: 2
(*) optional

Command-line

Usage: saga_cmd ta_hydrology 19 [-DEM <str>] [-WIDTH <str>] [-TCA <str>] [-SCA <str>] [-COORD_UNIT <str>] [-METHOD <str>]
  -DEM:<str>       	Elevation
	Grid, input
  -WIDTH:<str>     	Flow Width
	Grid, output
  -TCA:<str>       	Total Catchment Area (TCA)
	Grid, input, optional
  -SCA:<str>       	Specific Catchment Area (SCA)
	Grid, output
  -COORD_UNIT:<str>	Coordinate Unit
	Choice
	Available Choices:
	[0] meter
	[1] feet
	Default: 0
  -METHOD:<str>    	Method
	Choice
	Available Choices:
	[0] Deterministic 8
	[1] Multiple Flow Direction (Quinn et al. 1991)
	[2] Aspect
	Default: 2