黄土高原丘陵沟壑区一副区小流域淤地坝系效益分析——以王茂沟小流域为例

淤地坝是水土保持治理的主要措施之一，特别是在水土流失最为严重的黄土丘陵沟壑区一副区．其效益更为突出。根据王茂沟流域淤地坝坝系的调查资料．分析了王茂沟流域坝系的蓄洪拦泥、增产、生态、社会效益。研究结果表明，黄土高原丘陵沟壑区的淤地坝坝系在防止沟道侵蚀、提高粮食产量、促进植被恢复及土地利用结构调整、促进农村产业结构调整、提高水资源利用率、便利交通、促进农村科技文化事业的发展等方面发挥着不可替代的作用。

Benefit Analysis of Check Dams System in Small Watershed in First Sub-region of Hilly-gully Loess Plateau——A Case Study in Wangmaogou Watershed

Check dam is the main measure for soil and water conservation, and its benefit in water and soil loss is remarkable, especially in the most seriously eroded first sub-region of hilly-gully Loess Plateau. On the basis of investigated data of Wangmaogou watershed check dams system, the benefits of flood trapping and sediment blocking,increasing land productivity,eco-environment, society are analyzed. Check dams system plays an irreplaceable role in preventing gully bed from cutting down, improving yield, accelerating the recovery of regional vegetable and adjustment of land utilization structure,improving adjustment of rural industrial framework, enhancing the efficiency of water resources, ameliorating local traffic, speeding up the development of rural science, technology and civilization.