黄渭洛河汇流区河势演变及其带来的影响

Changes of Channel Configuration and Its Influences on Confluence Area of the Yellow River, the Weihe and Beiluohe Rivers

70年代以来黄渭洛河汇流区河势恶化 ,其表现是黄河西摆、河床展宽 ,渭河口上提 ,汇流区水流散乱。这些不利变化的主要原因是潼关高程抬升和不合理的河道工程布设引起的。同时由于汇流区河势的不利变化减弱了黄渭河泄洪输沙能力 ,又不利于潼关高程的冲刷下降。作者针对渭河下游及黄渭洛河汇流区泥沙发展及河势变化 ,提出合理的潼关高程为 32 5m以下 ,为稳定汇流区河势 。

Since 1970, the channel configuration has been worsened. The channel of the Yellow River shifted to the west and become widened, the mouth of the Weihe River moved to the upstream, and the flow in the confluence area revealed disordered and scattered. All of these are caused by the raising of channel bed at Tongguan and effects of river training works. Because of the unfavorable changes, the flood conveying capacity and sediment carrying capacity of the Yellow River and the Weihe River were decreased, which further reduced the erosion of elevation at Tongguan. This paper studies the changes of river configuration and suggests the strategy to stabilize the river channel in the confluence area.