Flood Control Impact Assessment Research Of Communication Connecting Line Project Of Expressway

In the new century,water conservancy has made a great progress as an infrastructural industry,with the fast growth of economy and the happening of extreme climate,flood control emergency is also necessary.Flood disaster causes tremendous property loss and casualties.Take daming communication connecting line project of daguang expressway as an example,use MIKE21 to creat the daming flood detention basin two-dimensional model,the reliability demonstration of model by the measured flood data in 1963.Data on water level,water depth and flow field are obtained,and these results provide strong technical support and scientific basis for the interaction effect between daming communication connecting line project and daming flood detention basin.The next time,according to the relevant requirements finish flood control impact assessment of daming communication connecting line project of daguang expressway,comprehensive conclusion and suggestions will be provided.The main work of this paper are as follows:(1)Previous data processing for MIKE21 two-dimensional mathematical model,especially the measured elevation point data for daming flood detention basin,and extract the project boundary files.Import the measured elevation data files and boundary files into MIKE21,the triangular mesh is used to divide the whole closed area,and the maximum mesh length is 50 m.The next step is to interpolate the measured elevation point data to the mesh file,give the elevation data to each mesh,and complete the creation of two-dimensional mathematical model.(2)Verify the reliability of the two-dimensional mathematical model,the method is putting historical flood into model and getting the simulation results,then compare the results with the historical flood data.Reliability of model is determined by the difference between simulation results and historical flood data.The difference between simulation results in this paper and historical flood data is not big,so the model is believed to be reliable.(3)Analyze the result of water level,water depth and flow field on a 50 years cycle,a 100 years cycle before and after the construction of this project.The result shows that daming communication connecting line project has little effect on daming flood detention basin,but the project do not meet the requirement of flood control on a 100 years cycle.The suggestion is taking corresponding measures to meet the relevant requirements.