SAGA-GIS Tool Library Documentation (v9.1.2)

Tool CIT Index

The tool allows one to calculate a variant of the Stream Power Index, which was introduced to detect channel heads (channel initiation) based on a drainage area-slope threshold. The Channel Initiation Threshold (CIT) index is calculated as: CIT = SCA * tan(Slope)^2


References


Parameters

 NameTypeIdentifierDescriptionConstraints
InputSlopeGrid, inputSLOPEThe slope grid [radians].-
Catchment AreaGrid, inputAREAThe catchment area grid [map unitsz^2].-
OutputCIT IndexGrid, outputCITThe Channel Initiation Threshold index.-
OptionsGrid SystemGrid systemPARAMETERS_GRID_SYSTEM--
Area ConversionChoiceCONV-Available Choices:
[0] no conversion (areas already given as specific catchment area)
[1] 1 / cell size (pseudo specific catchment area)
Default: 0

Command-line

Usage: saga_cmd ta_hydrology 31 [-SLOPE <str>] [-AREA <str>] [-CIT <str>] [-CONV <str>]
  -SLOPE:<str>	Slope
	Grid, input
  -AREA:<str> 	Catchment Area
	Grid, input
  -CIT:<str>  	CIT Index
	Grid, output
  -CONV:<str> 	Area Conversion
	Choice
	Available Choices:
	[0] no conversion (areas already given as specific catchment area)
	[1] 1 / cell size (pseudo specific catchment area)
	Default: 0