(supported by the National Natural Science Foundation of China)

This project, which is funded by the National Natural Science Foundation of China and supported by Beijing Normal University, is being implemented in collaboration with Jinan Hydrological Bureau. Prof. Zongxue Xu is the project leader. The project focuses on the city of Jinan, considered as a representative urban area. It is aimed at developing countermeasures for flood control and disaster reduction in light of major scientific questions, notably those relating to the mechanisms that drive urban flow generation and routing as well as flood and waterlogging disasters. The project responds to the strong nationwide demand for the construction of sponge cities in China. Considering the generative process behind flood disasters and the regional characteristics of Jinan City, the research team will analyze how rainfall and runoff impact on different underlying surfaces. Surface flow system, underground pipeline networks, and urban flood discharge network models will be deveoped on the basis of one- and two-dimensional hydrodynamic equations and hydraulic continuity equations using the continuous multi-medium model coupling method. This strategy enables the coupling of surface and slope runoff. A comprehensive simulation of urban surface runoff and drainage pipeline networks will be developed using a hydrodynamic model to develop a distributed hydrodynamic simulation model of urban torrential rain and floods in rivers and lakes considering weirs and sluices. Based on the simulation results of the model of urban torrential rain and flood evolution, the driving mechanism and primary contributing factors of flood and waterlogging disasters in Jinan City will be analyzed. Data on historical disasters and remote sensing images will be integrated into the simulation of spatial inundation and flood evolution to produce a comprehensive evaluation of the flood risk in Jinan City. The model, which applies risk assessment methods and techniques, can be used to investigate the connectivity of urban river and lake systems, flood control, and drainage requirements and to identify high-risk areas that are prone to floods and waterlogging disasters. Applying the concepts of LID and sponge city, a distributed hydrodynamic urban rainstorm flood model and flood risk assessment model will be used for the simulation. The applicability of different LID combinations in Jinan City and the effects of flood control and disaster reduction will be analyzed and compared. Innovative techniques and measures will be explored in relation to urban storm/flood management to provide scientific and technological support for the construction of a sponge city, leading to flood control and the reduction of disasters in Jinan City.