中文摘要：

利用流域内所有国家气象站及区域自动站共39站逐小时降水实况、过程降水量和降水落区预报、数字高程模型（DEM）、土地利用、土壤类型以及实地灾情调查等资料,采用Flood Area模型的暴雨淹没情景,对2013年7月5日20时—6日20时大通河流域出现的历史罕见强降水时段进行洪水淹没模拟及效果检验。模拟结果表明：大通河流域中上游水位上涨明显,大部地区涨水超过1 m,部分支流水位上涨超过3 m,竹阳乡、酉华乡和乔木乡的局部地区涨水超过6 m。灾情调查检验表明,对于洪水淹没范围和淹没水深,Flood Area模拟值与实况值均较为吻合,表明Flood Area模型在大通河流域具有较好的洪水淹没模拟效果,可用于暴雨洪涝灾害风险评估与预警业务。

英文摘要：

A heavy precipitation which is rare in history struck Datong river basin from 20 BT 5 July to 20 BT 6 July 2013. By using data of hourly rainfall with all of the meteorological stations in the basin, the cumulative rainfall as well as the forecast precipitation, the digital elevation model, the landuse, the soil types and the disasters data etc, this study adopts one of the flooding scenes- the rainstorm flooding of Flood Area model, to carry out the flooding simulation of this heavy precipitation and to test its effectiveness. The results show that there is a sharp rise of the water level at upper and middle of Datong river basin, and the water level has increased by over one meter in most parts, by over 3meters in some branches and by 6 meters in some areas in Zhuyang town, Youhua town and Qiaomu town. According to the disaster investigation, in both the aspects of flooding scope and flooding depth, the simulation result of Flood Area model agrees with the fact. This indicates that the Flood Area model generates good simulation effect of flooding in Datong river basin and it can be employed in the risk evaluation and early-warning of rainstorm and flood disasters.