SAGA-GIS Module Library Documentation (v2.2.2)

Module Flow Accumulation (Mass-Flux Method)

The Mass-Flux Method (MFM) for the DEM based calculation of flow accumulation as proposed by Gruber and Peckham (2008).

!!!UNDER DEVELOPMENT!!! To be done: solving the streamline resolution problem

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, Bd.33, S.293-308.

Parameters

 NameTypeIdentifierDescriptionConstraints
InputElevationGrid (input)DEM--
OutputFlow AccumulationGrid (output)AREA--
Slope (*)Data Object (optional output)G_SLOPE--
Aspect (*)Data Object (optional output)G_ASPECT--
Flow Accumulation (*)Data Object (optional output)G_AREA--
Flow Lines (*)Data Object (optional output)G_FLOW--
OptionsFlow Split MethodChoiceMETHOD-Available Choices:
[0] flow width (original)
[1] cell area
Default: 0
SlopeBooleanB_SLOPE-Default: 0
AspectBooleanB_ASPECT-Default: 0
Flow AccumulationBooleanB_AREA-Default: 0
Flow LinesBooleanB_FLOW-Default: 0
(*) optional

Command-line

Usage: saga_cmd ta_hydrology 18 [-DEM <str>] [-AREA <str>] [-METHOD <str>] [-B_SLOPE <str>] [-G_SLOPE <str>] [-B_ASPECT <str>] [-G_ASPECT <str>] [-B_AREA <str>] [-G_AREA <str>] [-B_FLOW <str>] [-G_FLOW <str>]
  -DEM:<str>     	Elevation
	Grid (input)
  -AREA:<str>    	Flow Accumulation
	Grid (output)
  -METHOD:<str>  	Flow Split Method
	Choice
	Available Choices:
	[0] flow width (original)
	[1] cell area
	Default: 0
  -B_SLOPE:<str> 	Slope
	Boolean
	Default: 0
  -G_SLOPE:<str> 	Slope
	Data Object (optional output)
  -B_ASPECT:<str>	Aspect
	Boolean
	Default: 0
  -G_ASPECT:<str>	Aspect
	Data Object (optional output)
  -B_AREA:<str>  	Flow Accumulation
	Boolean
	Default: 0
  -G_AREA:<str>  	Flow Accumulation
	Data Object (optional output)
  -B_FLOW:<str>  	Flow Lines
	Boolean
	Default: 0
  -G_FLOW:<str>  	Flow Lines
	Data Object (optional output)