中文摘要：

为降低堤防溃决造成的重大生命财产损失,基于MIKE软件建立东鱼河南片（苏）防洪保护区一、二维水动力耦合模型,沿复新河堤防设置溃口1和溃口2,模拟复新河遭遇20 a一遇和50 a一遇洪水以及同频率暴雨下单个溃口的溃堤洪水在防洪保护区内的演进。对溃口流量过程、洪水演进图、最大淹没水深图进行分析,结果表明：随着溃堤洪水量级增大,淹没程度提高;同频率来水条件下,位于地势较低处的溃口1产生洪水的风险更大,是防洪的重点。

英文摘要：

In order to reduce the significant loss of life and property caused by the levee-breach flood,one-dimensional and two-dimensional hydrodynamic coupling model based on the MIKE software was developed in the southern flood protected zone （ Su） of Dongyu River. Using the model,levee breach 1 and levee breach 2 were set along the Fuxin River levee to successfully simulate the evolution of single levee- breach flood in the flood protected zone when the Fuxin River suffered by 20-year return-period and 50-year return-period floods and the same return-period rainstorm. The breach flow process,flood evolution map and the maximum water depth map were analyzed in this paper,and the results show that with the increase of levee-breach flood magnitude, the inundated degree increases; with the same return-period flood and rainfall,levee breach 1 in low-lying zone produces higher risks, thus it is the key area for flood control.