狠抓坡改梯建设 促进农业稳产高产

狠抓坡改梯建设　促进农业稳产高产柳华（湖北省房县水利电力局，４４２１００）房县地处鄂西北山区，总面积５１１０ｋｍ２，其中水土流失面积１４５０。３ｋｍ２，全县共５０．０１万人，３．４５万ｈｍ２耕地，其中坡耕地占８０％。由于坡耕地多，水土流失严重，农业生...

Study on Increasing Height of Main Silt-arrester by Stages with Equal Storage

The ways of increasing height.of silt-arrester by stages include that with equal storage,equal height and that without restraint. The way of increasing height of silt-arrester by stages with equal storage can save project investment.On the bsais of data from Hongyagou silt-arresters in Hengshan County of Shaanxi Province, the optimum number of increasing height with equal storage is 3 or 4,the corresponding initial storage is the premium storage.Each hightening should conduct at the time when the surplus storage without alluvion equals to designed flood detention storage.