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一、流域概况及治理效果西岔沟流域位于甘肃省通渭县东部边缘的新景公社张家山大队,属陇中黄土丘陵沟壑区。全流域仅一个大队10个生产队,184户,1,120人。干沟长10华里,两侧有11条毛沟,大多1—2华里长,总流域面积12,000亩。沟壑密度1.5公里/平方公里。海拔1,900米。年降雨400—500毫米。流域内土壤和植被分两类:上游3个生产队属土石山区,植以酸刺、梭梭草为主,植物群体比较稳定,水土流失较轻;下游7个队为黄土山区被,植被以野蒿、宾草为主,分布稀疏,极不稳定,水土流失严重。流域内耕地6,197亩,荒
First, the basin profile and governance effects West Chagou valley is located in the eastern edge of Tongwei County, Gansu Province, the new King commune Zhangjiashan Brigade, Longzhong loess hill and gully area. The whole basin only a brigade of 10 production teams, 184 households, 1,120 people. Length of 10 kilometers of dry gully, there are 11 on both sides of the furrows, most of the length of 1-2 years, the total drainage area of 12,000 acres. Gully density of 1.5 km / sq km. 1,900 meters above sea level. The annual rainfall of 400-500 mm. There are two types of soil and vegetation in the basin: the upstream three production teams belong to the rocky mountainous area, and the plants are mainly composed of Acid thorns and Haloxylon ammodendron. The plant groups are relatively stable and soil erosion is relatively light. The lower seven teams are loess mountainous areas, Artemisia, Bin grass-based, sparsely distributed, very unstable, serious soil erosion. Basin 6197 acres of arable land, shortage