黄土高原是一个少雨缺水、旱灾频繁、水土流失严重的地区。为发展生产,多修库坝,对当地水沙资源尽量作到就地拦蓄,就地利用是很必要的。这一地区洪水流含沙量很大,要蓄水就必须拦泥,而中小型水库泥沙淤满年限很短,严重地影响着水资源的开发与利用。目前在实际工作中,处理水库淤积问题的办法主要有四:一是用底孔排沙,蓄排相间,使水库内有淤有冲,做到冲淤平衡,永保兴利库容;二是蓄清排浑,洪水来时,使其及时快速排走,以防淤积;三是库坝结合,以坝保库,即在水库上游,根据要求分期修建拦洪淤地坝, The Loess Plateau is a region where there is little rain and water shortage, frequent drought and serious soil erosion. For the development of production, more repair library dam, as far as possible on the spot water and sediment reserves, local use is necessary. Floodwater in this area contains a large amount of sediment, so it is necessary to stop mud when it is impounding. However, siltation of small and medium-sized reservoirs is very short, seriously affecting the development and utilization of water resources. At present, in actual work, there are mainly four ways to deal with the problem of reservoir siltation. First, sediment discharge at the bottom hole and accumulation of phases are made in the reservoir so that there is a silt and red in the reservoir so that the balance of erosion and siltation can be maintained. Clean up the muddy, floods, to make it promptly discharged in time to prevent siltation; Third, the combination of reservoir and dam, dam reservoir, that is, in the reservoir upstream, according to the requirements of the construction of flood control dam,