Urban flood risk map management system for Quzhou City, Zhejiang Province

Urban flood risk map management system for Quzhou City, Zhejiang Province On Aug. 26, 2015, the project of Urban Flood Risk Mapping for Quzhou City, Zhejiang Province, one of the projects of flood risk mapping for the national key areas undertaken by NHRI Dept. of Hydrology and Water Resources, passed the technical review organized by Flood Control and Drought Relief Headquarters Office of Zhejiang Province in Hangzhou. The Review Group consisted of experts from Office of State Flood Control and Drought Relief Headquarters, China Institute of Water Resources and Hydropower Research, Flood Control Office of Taihu Basin Authority, Zhejiang Provincial Department of Water Resources, Zhejiang Design Institute of Water Conservancy and Hydro-Electric Power and Quzhou Municipal Bureau of Water Resources, listened carefully to the report of research findings. It was unanimously agreed that the project passed the technical review with advanced research technology, abundant research contents, significant practical value of the developed real-time flood risk analysis system and expected targets achieved.

Quzhou City, located in the west of Zhejiang Province and on the Qujiang River, is the one of typical mountain valley with an urban area of 255 km². In accordance with the national relevant guides, regulations and requirements of Zhejiang Provincial implementation plan, the project team constructed the 1D-2D coupling hydrodynamic model and urban drainage model, estimated the flood risk in terms of river flooding, precipitation induced urban inundation and corresponding flood damages and prepared a full set of flood risk maps, based on field investigation, detailed data collection and sorting. With the help of the Browser/Server structure, the urban flood risk map management system for Quzhou City has been developed with the multi-functions of design and management of flood scenarios, real-time flood simulation, damages assessment, flood risk mapping, real-time dyke breaching simulation, and demonstration and scheme comparison of flood risk maps, etc.