在同一流域中,无论修建水库、淤地坝、拦泥坝(实际是大型淤地坝),都能起到拦截泥沙的作用。上游坝(或库)对下游的库(或坝)在一定时期内都有减淤的作用;在这些库或坝淤满以后都能变成上地或耕地,这是公认的事实。在陕北就有“未淤满之前为库,淤满以后为坝”的说法。为了保护电市水库不使其淤满,在其上游修了拦泥坝及淤地坝以拦截泥沙,或进行综合治理, In the same basin, no matter whether reservoirs, silt dam and silt dam (actually large silt dam) are built, silt can be intercepted. It is generally acknowledged that upstream dams (or reservoirs) have the effect of reducing silt in downstream reservoirs (or dams) for a certain period of time; they can be turned into land or cultivated land after silting up of these reservoirs or dams. There is a saying in Northern Shaanxi that “before silting up is a reservoir and silting up afterwards.” In order to protect the power city reservoir does not make it silt, in its upstream repair of silt dam and silt dam to intercept sediment or carry out comprehensive management,