基于GIS、EFW和USLE的水侵蚀风险预测

Water Erosion Risk Prediction Based on GIS、EFW and USLE

为了预测位于德国下萨克森州的独立市瓦伦霍斯特(Wallenhorst)的水侵蚀情况,在全面调查,收集研究区气候、地形、土壤等基础资料的基础上,将地理信息系统(GIS)分别与EFW模型和通用土壤流失方程(USLE)相结合对瓦伦霍斯特进行区域水侵蚀的预测。从两种模型的结果进行对比分析。结果表明:EFW模型发现的风险主要集中在山丘,而USLE模型则发现更多的风险,最后把两种模型预测的结果做对比,除了个别区域有巨大差异之外,大部分吻合,说明了该水侵蚀风险预测的可信度,可为该区域更加针对性和科学性的治理和管理水土流失提供参考依据,为该地方拟定水土保持方案提供参考。

In order to predict water erosion risk at Wallenhorst, Niedersachsen, Germnay. Precipitation, topographic, soil, and land use data were collected, processed, and constructed into a spatial database using ArcGIS. Using EFW method and USLE equations for the analysis of Wallenhorst, from the results of a comparative analysis of the two models. The results show that, the EFW method has been shown that the risk is limited mainly to the mountains and on the hills. The potential water erosion risk is higher for the USLE method compared to the EFW method. But in addition to individual area has a huge difference, most of them are identical, illustrating the credibility of those erosion risk prediction. This result can pro vide the region more targeted and scientific management and provides some references for the management of soil and water loss.