渭河在潼关汇入黄河,是黄河的一条重要支流。三门峡水库建成前,渭河下游河道冲淤基本平衡略有淤积,两岸水利条件较好,只有少部分土地有轻度盐碱。1960年三门峡水库建成运用之后,由于下游河道淤积,华县上下游河段河床高出地面2～3.5m,成为“悬河”, Wei River into the Yellow River Tongguan, the Yellow River is an important tributary. Before the completion of the Sanmenxia Reservoir, the basic balance of scour and silting in the lower reaches of the Weihe River was slightly silted, and the water conservancy conditions were good across the Taiwan Strait. Only a small part of the land had slight salinities. After the Sanmenxia Reservoir was built and put into operation in 1960, due to siltation in the lower reaches of the river, the upper and lower reaches of Huaxian River are 2 ~ 3.5m above the ground and become “hanging river”