#Mike 21 rainfall runoff modeling series#
However, a series of urban water problems such as water pollution, water shortage, and urban flooding have arisen and posed a great challenge to the continued healthy development of social society. Introductionĭuring the past decades, Jinan City has experienced prosperity in social economy. This study will provide scientific support for the flood control and disaster reduction in Jinan City. Meanwhile, the zoning results for the two historical rainfalls show that flood with a higher maximum hourly rainfall intensity is more serious. The flood risk zoning result shows that rainfalls with larger recurrence intervals generate larger areas of moderate to extreme risk. The result shows that the InfoWorks ICM 2D model performed well.
The simulated water depth and flow velocity are recorded for flood risk zoning. The model is validated with observations, and the causes for errors are analyzed. This study is carried out in the “Sponge City Construction” pilot area of Jinan City, where the InfoWorks ICM 2D hydrodynamic model is utilized for simulating historical and designed rainfall events. Therefore, it is vital to investigate the rainstorm flood and further perform flood risk zoning. This results in high-velocity overland flow and deep waterlogging, which poses a tremendous threat to pedestrians and vehicles. Jinan City is higher in the south and lower in the north with a steep slope inclined from the south to the north.
Climate change and rapid urbanization have aggravated the rainstorm flood in Jinan City during the past decades.
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