Study On Dam Break Flood Risk Of Yuqiao Reservoir

China is the world’s largest dam built in the country, during the60years, Chinahas3462break, the accident rate is about4%, dam break disaster caused trafficgridlock, casualties and property loss serious. With rapid population growth andurbanization process accelerated, dam disaster has drawn increasing attention, peoplebegan to use scientific methods to identify and control the flood risk in an attempt tominimize flood hazards to human beings.Based on the Ministry of Water Resources in2009," Guidelines for thepreparation of flood risk maps " as the main basis for the preparation of standards andadhere to the principle of combining the actual work for Tianjin at the Bridge Reservoirdam break flood risk analysis carried out to analyze the possible impact of dam breakflood range of dam crash impact assessment draws dam break risk maps for reservoirmanagement and flood control departments to develop early warning and emergencymeasures to provide a scientific basis for the engineering design and decision-makingto provide strong technical support. The first study area using GIS technology to buildmathematical terrain, and highways, railways, water blocking embankments etc.generalization, established according to the terrain TIN grid; For maximum floodreservoirs for reservoir flood routing, determine the maximum discharge process;against gradually collapse and instantaneous collapse, using DAMBRK modelanalysis to determine the specific form and dam breach flow process; on this basis,establish a two-dimensional coupled flood routing model to determine the modelrange, meshing, inflow conditions, initial conditions, roughness select other modelparameters; for maximum flood reservoir, gradually collapse, instantaneous collapsethree cases, the evolution of the downstream flood simulation situation, refiningvelocity, depth, flooding duration, time of arrival, submerged area and other factors,rendering flood risk maps.