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治理沟头和胡同道路,是保塬固沟的主要措施之一。陕西省黄土高原沟壑区分布在渭北、陕北的南部,有六个地、市,四十多个县、区,总面积24170平方公里,占全省总面积的11.7％,塬面平缓,土层深厚,是陕西省第二大粮食生产基地,但塬高沟深,水源缺少,水蚀和重力侵蚀均很活跃,沟头溯塬侵蚀强烈,特别是塬面暴雨径流进沟,造成沟头前进,沟底下切,沟壁崩塌、滑塌、泻溜,沟岸扩张,蚕食塬面耕地。这个地区沟壑密度1～3.5km/km~2,年侵蚀模数一般为1000～3000t/km~2,局部地区达到3000～5000t/km~2。不少地方因沟头不断延伸,造成交通不便,危及村镇人民生命财产的安全。澄城县近几年来,有八个村庄,
Governance ditches and alley roads, is one of the main measures gully secures. The gully area of Loess Plateau in Shaanxi Province is located in Weibei and northern part of northern Shaanxi. There are six prefectures and forty or so counties and districts with a total area of 24,170 square kilometers, accounting for 11.7% of the total area of the province. The deep soil layer is the second largest food production base in Shaanxi Province. However, with the high ditch and deep gully, the water source is scarce, the water erosion and gravity erosion are very active, and the erosion of gully head and backwater is intense, especially the heavy rainfall runoff into the ditch on the plateau, resulting in ditches Go forward, cut under the ditch, trench wall collapse, slump, diarrhea, ditch bank expansion, eroded plateau arable land. The gully density in this area is 1 ~ 3.5km / km ~ 2, and the annual erosion modulus is generally 1000 ~ 3000t / km ~ 2, while in some areas it reaches 3000 ~ 5000t / km ~ 2. In many places, due to continuous extension of ditch, traffic inconvenience is caused, endangering the safety of people’s lives and property in villages and towns. Chengcheng County in recent years, there are eight villages,