Simulation and test of flood routing based on GIS Rainstorm Flood Inundation Model
YE Limei 1 , PENG Tao 2, 3 , ZHOU Yuehua 1 , GAO Wei 4 , NIU Ben 5, 6 , LIU Xudong 4, 7
1. Wuhan Regional Climate Centre, Wuhan 430074; 2. Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research, Institute of Heavy Rain,CMA, Wuhan 430074; 3. State Key Laboratory of Severe Weather/Chenese Academy of Meteorological Sciences, Beijing 100081; 4. China University of Geosciences, Wuhan 430074; 5. Wuhan Central Meteorological Observatory,Wuhan 430074; 6. Xiantao Meteorological Office of Hubei Province, Xiantao 433000; 7. The Inner MongoliaAutonomous Region aerial remote sensing surveying and Mapping Institute, Hohhot 010050
A simplified method of wave current and weir flow intersection from the experiences of several dam-breaks was used to simulate the flood discharges from the Ganhe river during the dam-break on July 14, 2010. Flood routing of the dam-break was simulated by using GIS flood drowned model based on the flood discharges and DEM data. The simulation results was tested by using disaster result analysis. The result shows that the inundated areas of Ganhe river basin were constantly increasing with flood routing, especially for the 0.5~1 meters depth section of the inundated areas. The flood arrived in Renwo viliage at 18:00 on the 14th, then flooded to Maqiao and Yanzhou viliage at 20:00 and 22:00. According to the disaster investigation, in both the aspects of flooding time and flooding location, the simulation result of rainstorm inundation model agrees with the fact. This indicates that the model can better simulate the flood evolution of dam-breaks.