ASSESSMENT OF CURRENT AND POTENTIAL WATER EROSION WITH RUSLE3D: APPLICATION TO VALENCIA PROVINCE (SPAIN)

作者：Garcia Jose L; Gimenez Martin C^*

来源：Fresenius Environmental Bulletin, 2012, 21(5A): 1278-1282.

• water erosion
• RUSLE3D
• GIS

The purpose of this study was the estimation of current and potential water erosion rates in Valencia Province using RUSLE3D (Revised Universal Soil Loss Equation-3D) model with Geographical Information System (GIS) support. RUSLE3D uses a new methodology for topographic factor estimation (LS factor) based on the impact of flow convergence allowing better assessment of sediment distribution detached by water erosion. In RUSLE3D equation, the effect that vegetation cover has on soil erosion rate is reflected by the C factor. Potential erosion indicates soil erosion rate without considering C factor in RUSLE3D equation. The results showed that 54% of estimated current erosion does not exceed 10 t/ha.year (low erosion). In the case of potential erosion rates, 9% of the area of Valencia Province do not exceed 10 t/ha.year but 41% exceed 200 t/ha.year. Based on these results, the current vegetation cover of Valencia Province is adequate but needs to be conserved to avoid an increase in the current soil erosion rates as shown by potential erosion rates.

• 出版日期2012