SAGA 9.4.2 | Tool Library Documentation

Isochrones Variable Speed


Description

Calculation of isochrones with variable speed. In case a cell in an optional input grid is NoData, the corresponding parameter value will be used instead of skipping this cell. This is the non-interactive tool version, where the target point can be specified either as point shapefile (the first point in the file will be used) or by target coordinates.


References


Parameters

 NameTypeIdentifierDescriptionConstraints
InputElevationgrid, inputDEM--
Slopegrid, inputSLOPE--
Catchment Areagrid, inputFLOWACC--
Curve Numbergrid, input, optionalCN--
Manning's Ngrid, input, optionalMANNING--
Target Pointshapes, input, optionalTARGET_PTA point shapefile with the target point.-
OutputTime Out(h)grid, outputTIME--
Speed (m/s)grid, outputSPEED--
OptionsGrid Systemgrid systemPARAMETERS_GRID_SYSTEM--
Avg. Manning's Nfloating point numberAVGMANNING-Default: 0.150000
Avg. Curve Numberfloating point numberAVGCN-Default: 75.000000
Mixed Flow Threshold (ha)floating point numberTHRSMIXED-Default: 18.000000
Channel Definition Threshold (ha)floating point numberTHRSCHANNEL-Default: 360.000000
Avg. Rainfall Intensity (mm/h)floating point numberAVGRAINFALL-Default: 1.000000
Channel side slope(m/m)floating point numberCHANSLOPE-Default: 0.500000
Min. Flow Speed (m/s)floating point numberMINSPEED-Default: 0.050000
Target X Coordinatefloating point numberTARGET_PT_XThe x-coordinate of the target point in world coordinates [map units]Default: 0.000000
Target Y Coordinatefloating point numberTARGET_PT_YThe y-coordinate of the target point in world coordinates [map units]Default: 0.000000

Command Line


Usage: saga_cmd ta_hydrology 30 [-DEM ] [-SLOPE ] [-FLOWACC ] [-CN ] [-MANNING ] [-TIME ] [-SPEED ] [-AVGMANNING ] [-AVGCN ] [-THRSMIXED ] [-THRSCHANNEL ] [-AVGRAINFALL ] [-CHANSLOPE ] [-MINSPEED ] [-TARGET_PT_X ] [-TARGET_PT_Y ] [-TARGET_PT ]
  -DEM:           	Elevation
	grid, input
  -SLOPE:         	Slope
	grid, input
  -FLOWACC:       	Catchment Area
	grid, input
  -CN:            	Curve Number
	grid, input, optional
  -MANNING:       	Manning's N
	grid, input, optional
  -TIME:          	Time Out(h)
	grid, output
  -SPEED:         	Speed (m/s)
	grid, output
  -AVGMANNING: 	Avg. Manning's N
	floating point number
	Default: 0.150000
  -AVGCN:      	Avg. Curve Number
	floating point number
	Default: 75.000000
  -THRSMIXED:  	Mixed Flow Threshold (ha)
	floating point number
	Default: 18.000000
  -THRSCHANNEL:	Channel Definition Threshold (ha)
	floating point number
	Default: 360.000000
  -AVGRAINFALL:	Avg. Rainfall Intensity (mm/h)
	floating point number
	Default: 1.000000
  -CHANSLOPE:  	Channel side slope(m/m)
	floating point number
	Default: 0.500000
  -MINSPEED:   	Min. Flow Speed (m/s)
	floating point number
	Default: 0.050000
  -TARGET_PT_X:	Target X Coordinate
	floating point number
	Default: 0.000000
  -TARGET_PT_Y:	Target Y Coordinate
	floating point number
	Default: 0.000000
  -TARGET_PT:     	Target Point
	shapes, input, optional