王东沟小流域水土保持防蚀措施优化配置与效益分析

根据野外天然降雨定位试验，野外人工模拟降雨与放水冲刷试验，土壤侵蚀类型遥感监测资料，以及小流域泥沙观测资料等，对王东沟小流域土壤侵蚀类型及其分布规律和水土保持减沙效益进行系统研究。尤其是对硬地面产流产沙的规律研究：进一步证明了黄土塬区村落系统硬地面及农田集流槽集水径流冲刷是导致沟头迅速延伸的主要原因。

Rational Disposition and Benefits Analysis of Anti-erosion Measures at Wangdong Gully Small Watershed in Changwu County

According to field positional experiment materials of natural and artificial rainfall and the water brushing,remote sensing of soil erosion types,and sediment of Wangdong gully small watershed,soil erosion laws and sediment reduction benefit,especially runoff and sediment yield on hard surface were studied.It has been proved that runoff brush from farmland and hard surface of village is a main reason for gully head rapid extending,the gully-slope road erosion is an important factor limiting sustainable development of farm economy.Gully-slope development engineerings which were built by the help of experimental station,made gully-slope eco-environment gradually turn into fine circle,the gully slope of bare mountain far from village had been replaced by new scene with road nets and full mountain fruits,and turned into economic gully slope