兴建三门峡水库以后,渭河下游赤水河口至陈村河段河道摆动剧烈,自然裁弯频繁发生。通过分析渭河下游河道实测资料发现其原因是下列因素的综合作用:(1)潼关局部侵蚀基准面的抬高;(2)河流比降变缓;(3)新淤滩地土质松散、粘性小;(4)河道主槽过水能力降低,洪水上滩机会增多;(5)高含沙水流的影响。 After the Sanmenxia Reservoir was built, the river from Chishui River mouth to Chencun River in the lower reaches of the Weihe River swung violently, and natural cut-off occurred frequently. The analysis of the observed data in the lower reaches of the Weihe River shows that the reasons are as follows: (1) the elevation of the local erosion datum in Tongguan; (2) the slowdown of river flow; (3) (4) The main channel of the river channel will have lower capacity of passing water and opportunities for floodwaters will increase; (5) The impact of high silt water flow.