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

Through the analysis for the autumn rain and 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 level,longer duration,peak 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 disasters,the paper discussed the impacts of on river channel in the down stream of Weihe River and put forward the control and disaster alleviation suggestions as reviewing the guarantee discharge and improving the standard for the control.