3.1.4. Potential Soil Erosion Map

By overlaying soil erodibility (Figure 4), topography and erosivity, using the "raster calculator" tool, the potential soil erosion risk map was obtained (Figure 6), following the formula presented in Figure 2.

From Figure 6, low-erosion risks present 3% (21.22 km2), moderate risks present 96.5% (682.25 km2) and high risks form 0.5% (3.53 km2). These percentages, however, reflect only the potential soil erosion risks which according to CORINE (1992) [62] do not take into consideration the vegetative cover at this stage. The slope effect and equal repartition of precipitation, as reflected by the MFI values and the absence of arid periods (low BGI), are potentially responsible for moderating the soil erodibility map yielding the dominantly moderate potential soil erosion risks.

**Figure 6.** Potential soil erosion (PSE) risk map of the Claise basin.
