内蒙古清水河县范四窑小流域,属黄土丘陵沟壑区,流域面积42.5平方公里,水土流失面积占95％。全流域1500人,7303亩耕地,土壤属黄土质栗钙土,治理前由于沟壑纵横,地形支离破碎,加之土质松散,暴雨集中,植被稀疏,水土流失十分严重,年平均侵蚀模数达8711吨/平方公里。 1984年该流域被列为自治区重点治理区,经过广大群众的努力,取得了很大成绩。到1988年底,全流域共修建淤地坝34座(其中大型骨干工程7座),谷坊800座,整修梯田3774亩,发展水浇地975亩,坝地1175亩,营造水土保持林27573亩(其中经经济800亩),发展牧 Fan Siyao small watershed Qingshuihe County, Inner Mongolia, is a loess hilly and ravine, basin area of ​​42.5 square kilometers, soil erosion area of ​​95%. The whole basin 1500 people, 7303 mus of arable land, the soil is loess soil chestnut soil, before the management due to ravines vertical and horizontal, terrain fragmented, combined with loose soil, rain concentrated, sparse vegetation, soil erosion is very serious, the average annual modulus of 8711 tons / Sq km. In 1984, the basin was listed as a key area under the jurisdiction of the autonomous region. After the efforts of the masses, great achievements have been made. By the end of 1988, a total of 34 dam sites (including 7 large-scale key projects) and 800 square valleys were constructed in the entire basin, with a total area of ​​3,774 hectares of terraced fields, 975 mu of irrigated land, 1175 mu of dam land and 27,573 mu of soil and water conservation forests (Of which 800 acres by the economy), the development of animal husbandry