MMF-SAGA Soil Erosion Model

Description

Soil erosion modelling with a modified MMF (Morgan-Morgan-Finney) model (Morgan & Duzant 2008).
This tool is called MMF-SAGA because some things have been implemented differently compared to the original publication. The most important are:

• the extension of the model to support spatially distributed modelling
• the introduction of a "Channel Network" layer
• the introduction of a "rainfall duration" (time span) parameter
• the exposure of the flow depth parameter

References

Morgan, R.P.C. (2001): A simple approach to soil loss prediction: a revised Morgan-Morgan-Finney model. Catena, 44, 305-322.

Morgan, R.P.C., Duzant, J.H. (2008): Modified MMF (Morgan-Morgan-Finney) model for evaluating effects of crops and vegetation cover on soil erosion. Earth Surf. Process. Landforms, 32, 90-106.

Setiawan, M. A. (2012): Integrated Soil Erosion Management in the upper Serayu Watershed, Wonosobo District, Central Java Province, Indonesia. Dissertation at the Faculty of Geo- and Atmospheric Sciences of the University of Innsbruck, Austria. PDF

Parameters

Command Line

Usage: saga_cmd sim_erosion 0 [-DTM ] [-S ] [-CHANNEL ] [-PI ] [-CC ] [-PH ] [-EtEo ] [-GC ] [-D ] [-NV ] [-MS ] [-BD ] [-EHD ] [-LP ] [-PER_C ] [-PER_Z ] [-PER_S ] [-ST ] [-RFR ] [-TAB_METEO ] [-OUT_PATH ] [-INTERFLOW ] [-T ] [-TIMESPAN ] [-IF ] [-R ] [-I ] [-Rn ] [-KE_I_METHOD ] [-FLOWD_VA ] [-CHANNELTRANSPORT ] [-Q ] [-SL ] [-Rf ] [-KE ] [-Rc ] [-TCc ] [-TCz ] [-TCs ] [-Gc ] [-Gz ] [-Gs ] [-SLc ] [-SLz ] [-SLs ] [-TCONDc ] [-TCONDz ] [-TCONDs ] [-W_up ]
  -DTM:                Digital Terrain Model
	grid, input
  -S:                  Slope
	grid, input
  -CHANNEL:            Channel Network
	grid, input, optional
  -PI:                 Permanent Interception
	grid, input
  -CC:                 Canopy Cover
	grid, input
  -PH:                 Plant Height
	grid, input
  -EtEo:               Ratio Evapotranspiration
	grid, input
  -GC:                 Ground cover
	grid, input
  -D:                  Diameter plant elements
	grid, input
  -NV:                 Number plant elements
	grid, input
  -MS:                 Soil moisture (at FC)
	grid, input
  -BD:                 Bulk density top layer
	grid, input
  -EHD:                Effective hydrological depth
	grid, input
  -LP:                 Sat. lateral permeability
	grid, input
  -PER_C:              Percentage clays
	grid, input
  -PER_Z:              Percentage silt
	grid, input
  -PER_S:              Percentage sand
	grid, input
  -ST:                 Percentage rock fragments
	grid, input
  -RFR:                Surface roughness
	grid, input, optional
  -TAB_METEO:          Meteorological data
	table, input, optional
  -OUT_PATH:           Output file path
	file path
  -INTERFLOW:          Simulate Interflow
	boolean
	Default: 1
  -T:               Mean temperature
	floating point number
	Default: 18.000000
  -TIMESPAN:           Timespan (days)
	integer number
	Minimum: 1
	Maximum: 365
	Default: 30
  -IF:                 Interflow
	grid, output, optional
  -R:               Rainfall
	floating point number
	Default: 200.000000
  -I:               Rainfall intensity
	floating point number
	Default: 20.000000
  -Rn:              Rainfall Duration
	floating point number
	Default: 20.000000
  -KE_I_METHOD:
                            Relationship KE - I
                            	choice
                            	Available Choices:
                            	[0] North America east of Rocky Mountains (Wischmeier & Smith 1978)
                            	[1] North-western Europe (Marshall & Palmer)
                            	[2] Mediterranean-type climates (Zanchi & Torri 1980)
                            	[3] Western Mediterranean (Coutinho & Tomas 1995)
                            	[4] Tropical climates (Hudson 1965)
                            	[5] Eastern Asia (Onaga et al. 1998)
                            	[6] Southern hemisphere climates (Rosewell 1986)
                            	[7] Bogor, West-Java, Indonesia (McISaac 1990)
                            	Default: 0
  -FLOWD_VA:
                            Flow Depth (actual flow velocity)
                            	floating point number
                            	Minimum: 0.000000
                            	Default: 0.005000
  -CHANNELTRANSPORT:   Route Soil along Channel Network
	boolean
	Default: 0
  -Q:                  Mean runoff
	grid, output
  -SL:                 Mean soil loss
	grid, output
  -Rf:                 Effective Rainfall
	grid, output
  -KE:                 Total Kinetic Energy
	grid, output
  -Rc:                 Soil moisture storage capacity
	grid, output
  -TCc:                Transport Capacity Clay
	grid, output
  -TCz:                Transport Capacity Silt
	grid, output
  -TCs:                Transport Capacity Sand
	grid, output
  -Gc:                 Available Clay
	grid, output
  -Gz:                 Available Silt
	grid, output
  -Gs:                 Available Sand
	grid, output
  -SLc:                Sediment Balance Clay
	grid, output
  -SLz:                Sediment Balance Silt
	grid, output
  -SLs:                Sediment Balance Sand
	grid, output
  -TCONDc:             Transport Condition Clay
	grid, output
  -TCONDz:             Transport Condition Silt
	grid, output
  -TCONDs:             Transport Condition Sand
	grid, output
  -W_up:               Upslope Flow Width
	grid, output