Scheme Selection of Internal Embankment Protection Engineering in Jingjiang Flood Diversion District

In order to find out the influence of non-plant internal embankment protection engineering on emergency protection in flood defense in flood diversion districts,observations on the water level,the rainfall and the flow of drainage ditches along the dangerous dike,and water injection tests on the dangerous non-plant internal protection dikes are conducted by taking Jingjiang flood diversion district as an example.The results show that if the flow of drainage ditches along the dangerous dike lags behind the change of water level 1~2 days,the flow of drainage ditches along the dangerous dike is greatly interfered by the rainfall during the rain and after the rain;the water leaking from the dike with a transverse groove is clearer than the injection water;but the farther from the injection site,the larger the flow loss is;the changes of the flow and its color along the foot of the dike without a transverse groove can not be observed.It draws a conclusion that the method of single non-plant protection slope is unfavorable for emergency protection in flood defense.The best way is to adopt composite slope protection with multiple levels of wave protection with forest under and over the designed flood water level so that it meets the needs of flood diversion and wave protection of the dikes in flood diversion districts.