SCIMAP - Fine Sediment

Author: Sim M. Reaney, Durham University 2005-2025
Menu: Simulation | SCIMAP Toolkit 1.1

Description

SCIMAP Risk Maps Generation. SCIMAP considers the spatial pattern of connectivity and source risks to create risk maps of the diffuse pollution. SCIMAP works in relative terms across the landscape to identify the most probable sources of the observed problem.

References

Reaney S., Lane S., Heathwaite A. and Dugdale L. (2011): Risk-based modelling of diffuse land use impacts from rural landscapes upon salmonid fry abundance. Ecological Modelling, 22, (4), 1016-1029. https://doi.org/10.1016/j.ecolmodel.2010.08.022

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Digital Elevation Model	grid, input	`DEM`	-	-
	Erodibility	grid, input, optional	`ERODIBILITY`	-	-
	Rainfall Pattern	grid, input	`RAINFALL`	-	-
Output	Slope	grid, output, optional	`SLOPE`	-	-
	Catchment Area	grid, output, optional	`CAREA`	-	-
	River Channels	grid, output, optional	`CHANNELS`	-	-
	Erosion Risk	grid, output	`EROSRISK`	This grid is the potential for material to be exported and connected to the river channels. It is the physical mobilisation risk mutipled by the connectivity	-
	Hydrological Connectivity	grid, output	`WETNESS`	This grid is relative strength of the connection between each point in the landscape and the river or lake that it drains to. Scaled between zero and one.	-
	Accumulated Erosion Risk	grid, output	`EROSRISKFACC`	-	-
	Top 10% Erosion Risk	grid, output	`EROSRISK_TOP`	-	-
	Erosion Risk in Channels Concn.	grid, output	`CHANNELSRISKCONCN`	-	-
Options	Grid System	grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Default	floating point number	`ERODIBILITY_DEFAULT`	default value if no grid has been selected	Minimum: 0.000000 Default: 1.000000
	Critical Area for Channels (m²)	floating point number	`CRITAREA`	-	Minimum: 800000.000000 Default: 5.000000
	DEM Pre-Processing	choice	`PREPROCESS`	-	Available Choices: [0] Deepen Drainage Routes [1] Fill Sinks [2] Fill Sinks XXL (Wang & Liu) [3] Fill Sinks (Planchon/Darboux, 2001) [4] none Default: 0
	Flow Direction Method	choice	`FLOWDIRMETHOD`	-	Available Choices: [0] Deterministic 8 [1] Rho 8 [2] Braunschweiger Reliefmodell [3] Deterministic Infinity [4] Multiple Flow Direction [5] Multiple Triangular Flow Directon [6] Multiple Maximum Downslope Gradient Based Flow Directon Default: 4
	Convergence	floating point number	`CONVERGENCE`	Convergence factor for Multiple Flow Direction Algorithm (Freeman 1991)	Minimum: 0.000000 Default: 1.100000
	Wetness Index Method	choice	`WETNESSINDEXMETHOD`	-	Available Choices: [0] Classic TWI (Kirkby 1976) [1] SAGA Wetness Index Default: 0
	Connectivity Index	choice	`CONNINDEX`	-	Available Choices: [0] Network Index of Connectivity [1] Percentage Downslope Saturated Length Default: 0
	Stream Power	choice	`STREAMPOWERMETHOD`	Decide how to include stream power as part of erosivity	Available Choices: [0] Stream Power [tan(slope) * area] [1] Simplified Stream power [tan(slope) * (area / cellsize)^0.5] [2] Stream Power Specifc Catchment Area [tan(slope) * (area / cellsize)] Default: 0

Command Line


Usage: saga_cmd sim_scimap 0 [-DEM ] [-ERODIBILITY ] [-ERODIBILITY_DEFAULT ] [-RAINFALL ] [-SLOPE ] [-CAREA ] [-CHANNELS ] [-EROSRISK ] [-WETNESS ] [-EROSRISKFACC ] [-EROSRISK_TOP ] [-CHANNELSRISKCONCN ] [-CRITAREA ] [-PREPROCESS ] [-FLOWDIRMETHOD ] [-CONVERGENCE ] [-WETNESSINDEXMETHOD ] [-CONNINDEX ] [-STREAMPOWERMETHOD ]
  -DEM:                      Digital Elevation Model
	grid, input
  -ERODIBILITY:              Erodibility
	grid, input, optional
  -ERODIBILITY_DEFAULT:   Default
	floating point number
	Minimum: 0.000000
	Default: 1.000000
  -RAINFALL:                 Rainfall Pattern
	grid, input
  -SLOPE:                    Slope
	grid, output, optional
  -CAREA:                    Catchment Area
	grid, output, optional
  -CHANNELS:                 River Channels
	grid, output, optional
  -EROSRISK:                 Erosion Risk
	grid, output
  -WETNESS:                  Hydrological Connectivity
	grid, output
  -EROSRISKFACC:             Accumulated Erosion Risk
	grid, output
  -EROSRISK_TOP:             Top 10% Erosion Risk
	grid, output
  -CHANNELSRISKCONCN:        Erosion Risk in Channels Concn.
	grid, output
  -CRITAREA:              Critical Area for Channels (m²)
	floating point number
	Minimum: 800000.000000
	Default: 5.000000
  -PREPROCESS:               DEM Pre-Processing
	choice
	Available Choices:
	[0] Deepen Drainage Routes
	[1] Fill Sinks
	[2] Fill Sinks XXL (Wang & Liu)
	[3] Fill Sinks (Planchon/Darboux, 2001)
	[4] none
	Default: 0
  -FLOWDIRMETHOD:            Flow Direction Method
	choice
	Available Choices:
	[0] Deterministic 8
	[1] Rho 8
	[2] Braunschweiger Reliefmodell
	[3] Deterministic Infinity
	[4] Multiple Flow Direction
	[5] Multiple Triangular Flow Directon
	[6] Multiple Maximum Downslope Gradient Based Flow Directon
	Default: 4
  -CONVERGENCE:           Convergence
	floating point number
	Minimum: 0.000000
	Default: 1.100000
  -WETNESSINDEXMETHOD:       Wetness Index Method
	choice
	Available Choices:
	[0] Classic TWI (Kirkby 1976)
	[1] SAGA Wetness Index
	Default: 0
  -CONNINDEX:                Connectivity Index
	choice
	Available Choices:
	[0] Network Index of Connectivity
	[1] Percentage Downslope Saturated Length
	Default: 0
  -STREAMPOWERMETHOD:        Stream Power
	choice
	Available Choices:
	[0] Stream Power [tan(slope) * area]
	[1] Simplified Stream power [tan(slope) * (area / cellsize)^0.5]
	[2] Stream Power Specifc Catchment Area [tan(slope) * (area / cellsize)]
	Default: 0