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Home > Themesites > IMAGE > Model Details > Land Degradation > Model documentation, input and output
Land Degradation Model
The IMAGE 2.4 Land Degradation Model (LDM) comprises a qualitative description of the land degradation process of water erosion.
Model documentation, input and outputThe Land Degradation Model is described in detail by Hootsmans et al. (2001). The water erosion model is based on the work of Batjes (1996a), who used a simplified version of the Universal Soil Loss Equation (USLE) (Wischmeier and Smith, 1978). | Model input and output | | Model input |
- Precipitation
- Number of wet days (assumed constant in time)
- Soil erodibility index (based on soil texture, bulk density and depth), which is assumed to be constant in time
- Relief index (assumed to be constant in time)
- Land-cover types
| | Model assumptions |
- Land-use pressure index for land-cover types
| | Model output |
- Water-erosion susceptibility and sensitivity
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