SAGA-GIS Module Library Documentation (v2.3.0)

Module Diffuse Pollution Risk

Diffuse Pollution Risk Mapping.
This tool tries to reproduce in parts the methodology of the SCIMAP - Diffuse Pollution Risk Mapping - Framework.

References:
Lane, S.N.; Brookes, C.J.; Kirkby, M.J.; Holden, J. (2004): A network-index-based version of TOPMODEL for use with high-resolution digital topographic data. In: Hydrological processes. Vol. 18, S. 191-201.

Milledge, D.G.; Lane, N.S.; Heathwait, A.L.; Reaney, S.M. (2012): A monte carlo approach to the invers problem of diffuse pollution risk in agricultural catchments. In: Science of the Total Environment. Vol. 433, S. 434-449.

Parameters

 NameTypeIdentifierDescriptionConstraints
InputElevationGrid (input)DEM--
Channel Network (*)Grid (optional input)CHANNEL--
Land Cover Weights (*)Grid (optional input)WEIGHT--
Rainfall (*)Grid (optional input)RAIN--
OutputDelivery IndexGrid (output)DELIVERY--
Locational RiskGrid (output)RISK_POINT--
Diffuse Pollution RiskGrid (output)RISK_DIFFUSE--
OptionsGrid systemGrid systemPARAMETERS_GRID_SYSTEMGrid system-
DefaultFloating pointWEIGHT_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000
Default: 1.000000
DefaultFloating pointRAIN_DEFAULTdefault value if no grid has been selectedMinimum: 0.000000
Default: 500.000000
Flow Direction AlgorithmChoiceMETHOD-Available Choices:
[0] single
[1] multiple
Default: 1
Channel Initiation ThresholdIntegerCHANNEL_STARTminimum number of upslope contributing cells to start a channelMinimum: 1
Default: 150
(*) optional

Command-line

Usage: saga_cmd sim_hydrology 4 [-DEM <str>] [-CHANNEL <str>] [-WEIGHT <str>] [-WEIGHT_DEFAULT <double>] [-RAIN <str>] [-RAIN_DEFAULT <double>] [-DELIVERY <str>] [-RISK_POINT <str>] [-RISK_DIFFUSE <str>] [-METHOD <str>] [-CHANNEL_START <num>]
  -DEM:<str>              	Elevation
	Grid (input)
  -CHANNEL:<str>          	Channel Network
	Grid (optional input)
  -WEIGHT:<str>           	Land Cover Weights
	Grid (optional input)
  -WEIGHT_DEFAULT:<double>	Default
	Floating point
	Minimum: 0.000000
	Default: 1.000000
  -RAIN:<str>             	Rainfall
	Grid (optional input)
  -RAIN_DEFAULT:<double>  	Default
	Floating point
	Minimum: 0.000000
	Default: 500.000000
  -DELIVERY:<str>         	Delivery Index
	Grid (output)
  -RISK_POINT:<str>       	Locational Risk
	Grid (output)
  -RISK_DIFFUSE:<str>     	Diffuse Pollution Risk
	Grid (output)
  -METHOD:<str>           	Flow Direction Algorithm
	Choice
	Available Choices:
	[0] single
	[1] multiple
	Default: 1
  -CHANNEL_START:<num>    	Channel Initiation Threshold
	Integer
	Minimum: 1
	Default: 150