渭河“11·9”洪水特性及其河道影响分析

Analysiys of flood characteristics in September 2011 and its impact on the channel of Weihe river

通过对2011年9月渭河中下游秋淋降雨及洪水过程的分析表明:"11.9"洪水渭河下游呈现出洪水位高、持续时间长、洪峰沿程削减小以及临潼～华县区间洪水演进缓慢等特点,从洪水过程河道冲淤、河势变化及洪水灾害等方面探讨了洪水对渭河下游河道的影响,提出了复核保证流量与提高控导工程标准等防洪减灾建议。

Through the analysis for the autumn rain and flood process in September 2011 in the middle and down stream of Weihe River,the results showed that the '11.9 'flood in the down stream of Weihe River appeared some characteristics as high flood level,longer duration,peak flood reducing along the river and slow evolution between Lintong and Huaxian.From the aspects of sediment scouring and silting in the river channel,the changes of river regime and flood disasters,the paper discussed the impacts of flood on river channel in the down stream of Weihe River and put forward the flood control and disaster alleviation suggestions as reviewing the guarantee discharge and improving the standard for the flood control.