Abstract
China is one of the countries with frequent flood disaster, and it does fall often with more precipitation especially from June to October in the Yangtze River, which would very easily cause floods thereby seriously threating to the safety of each region along the Yangtze River. How to manage regional flood risk reasonably and efficiently under the new situation of the joint effects of climatic change and human activities deserves more researches. The regional flood risk management model is built and applied in the Jingjiang section of the Yangtze River to derive regional flood processes under the condition of floodwall break and assess the effects of flood on each factor in the region. The built model is reliable and practical with reasonable results, would support some sort of technical help for regional flood risk management, water resources protection and measure-making of flood prevention and disaster mitigation.
Highlights
Water resources, as one of the most important basic natural resources, are limited in the natural
It is assumed that the once-in-100 years, oncein-200 years flood will occur in the Yangtze River and the dike at the Shuidesi will break, the flood evolution process can be seen in Fig. 5, in which, Fig. 5 (a) ~ (d) is the water-depth distribution at 10 h, 20 h, 50 h and 110 h under the once-in-100 years flood; Fig. 5 (e) ~ (h) is the water-depth distribution at 10 h, 20 h, 50 h and 90 h under the once-in-200 years flood, respectively
It can be found that deeper water depth and faster flow velocity is distributed across the entrance of the Jingjiang flooddiversion area (JJFDA), and there is the steady flow velocity in the regions like Xinhong, Qinghuasi, Chonghu Lake and Huangtian Lake, the water depth in above regions, exceeds 6 m, is much higher than the safety water depth of 4.5 m ~ 5 m, which inevitably leads to overflow and poses a high flood risk
Summary
As one of the most important basic natural resources, are limited in the natural. The flood risk management of the Jingjiang section in the middle and lower reaches of Yangtze River is proposed in this study to simulate the state of flood flow in different flood situations in the region of the floodwall break and analyse the risk in the process of flood routing and risk distribution characteristics and evaluate the influence of the evaluation of regional flood risk In this way, the risk of flood can be effectively reduced, and the results of this study could play a supplementary role in the formulation of flood control and disaster reduction measures under the new situation, so as to provide effective technical support for regional flood risk management
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
