Abstract:

Based on the analysis of the present situation and existing problems of the bankline use in the middle and lower reaches of the Yangtze River,with the mathematical model research method,taken bridges in Wuhan river reach and dock groups in Yangzhong river reach as examples,the calculation of accumulated influence on river flood water level and flow field by lots of wading engineering groups were carried out.Results showed that the flood water level and velocity influence were accumulated after the wading engineering groups built and the influence of wading engineering groups was much larger than that of single engineering.When the influence was increased to the extent,it would do harm to the river regime and flood carrying capacity.In the end,some suggestions are given,such as the bridge density and dock group scale should be controlled reasonable,the principle of the bankline use should be put forward,river engineering design should be regulated,and River regulation should be strengthened,in order to minimize the cumulative effects of flood control