Plugin was written by Andrew Freebairn, it is based on Scott Wilkinson's et al paper "Development of a time-stepping sediment budget model for assessing land use impacts in large river basins". It also borrows from the Dynamic SedNet plugin developed at DERM by Robin Ellis (Unlicensed) and Ross Searle (Unlicensed) (now at CSIRO).
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Parameter | Description | Source |
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USLE HSDR - Fine | Hill sediment delivery ratio | Default 0.1 (Prosser et al, 2001) |
R | rainfall erosivity factor | Internally calculated based on rainfall for the given timestep and uses Yang and Yu (1987) method |
KLSC | Soil erodibility factor, slope length, steepness factor and cover factor (static) | K - Soil erodability (Wischmeier and Smith (1978)) L - Slope length (default, 1) S - Steepness raster generated by dSednetDerivedLayers for steepness factor C - Cover factor (Rosewell, 1993) |
KLSCdynamic | Soil erodibility factor, slope length, steepness factor and cover factor | Where C is played as a time series to capture the temporal variance of vegetation cover. Perform raster operations, where static KLS are multiplied together to for a single KLS raster. Then for each daily C layer multiple with the KLS raster to produce a daily layers for KLSC. Use the spatial parameteriser the model, using t |
S | mean summer rainfall | Internally calculated by the temporal parameterisation |
P | mean annual rainfall | Internally calculated by the temporal parameterisation |
R Factor Rainfall Threshold | R rainfall threshold | 12.7 mm (If daily rainfall is less than this threshold then the R value is set to 0) |
Alpha | Rainfall erosivity factor used to calculate R | Calculated at runtime based upon S and P |
Beta | Rainfall erosivity factor used to calculate R | Default values are set - 1.49, or use the Beta raster generated by dSednetDerivedLayers which uses Yang and Yu (1987) method |
Eta | rainfall erosivity factor used to calculate R | Default, 0.389 (Yang and Yu, 1987) method |
DWC | Dry Weather Concentration | User defined from literature |
Off set from day of year | Number of days that are subtracted from the current day of year | Default, 15 |
Daily Rain | Rainfall that fell on a single 24hrs measured in mm | This will be assigned at runtime by the system. It is obtained from the rainfall runoff model for the associated FU |
R is based on Yang et al (2015) - Yang Xihua, Yu Bofu (2015) Modelling and mapping rainfall erosivity in New South Wales, Australia. Soil Research 53, 178-189.
Beta base on on Yang et al (2015) - Yang Xihua, Yu Bofu (2015) Modelling and mapping rainfall erosivity in New South Wales, Australia. Soil Research 53, 178-189.
The parameter KLSC (static) (or KLSCdynamic, dynamic) can be provided to the model in a number of different ways.
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