近年来 ,渭河下游的来水来沙条件发生了一系列新的变化 ,同时由于潼关高程的淤积抬高 ,渭河下游的淤积量尤其是主槽的淤积量明显增加 ,导致渭河下游防洪水位抬高 ,洪水灾害严重。本文以大量的实测资料为基础 ,对渭河下游近年来的冲淤变化特点进行了深入研究 ,旨在为今后渭河下游的治理提供理论依据 In recent years, a series of new changes have taken place in the incoming and outgoing water and sediment in the lower reaches of the Weihe River. At the same time, siltation in the lower reaches of the Weihe River, especially in the main channel, has increased markedly due to siltation of Tongguan elevation, leading to elevation of flood control levels in the lower reaches of the Weihe River The flood disaster is serious. Based on a large amount of measured data, this paper deeply studies the characteristics of scouring and silting in the lower reaches of the Weihe River in recent years, aiming to provide theoretical basis for the future treatment of the Weihe River