知识与财富的链接
利用RS和GIS技术为主要手段,对陕西省境内的渭河流域河段的水土流失状况进行风险评估。通过遥感解译和空间分析的方法,提取了对水土流失状况起关键作用的植被、坡度和降雨因子。利用GIS对三个因子进行了空间叠加分析,并参照《土壤侵蚀分类分级标准》(SL190-2007)和《水土保持技术规范》得出了实验区的水土流失风险程度图。通过观察2001年的遥感数据发现:渭河流域的水土流失状况比较严重,特别是洛川县、千阳县等地区。
This paper used the technology of RS and GIS as the main means to conduct the risk assessment of water and soil loss status of Weihe River basin in Shaanxi Province.It collected three factors that play a key role in soil and water loss through the method of sensing and spatial analysis,such as vegetation,slope and rainfall.The researchers dealed with the three factors using spatial superposition analysis of GIS,and the researchers also worked out the risk degree figure of soil and water loss in compliance with the classification of soil erosion grading standards(SL190-2007) and the soil and water conservation technology norms.Through the observation of data of remote sensing in 2001,it has been found that the water and soil loss status in Weihe River basin is more serious,especially in Luochuan,Qianyang and other regions.
