Abstract
The operation of flood retarding areas does not attract much attention, although they are important components of flood control systems. Poor operation of such areas restricts not only the socio-economic development of the flood retarding area, but also limits scientific flood control options. As the second-largest flood retarding area in China, with more than 2000 km2 and 300 polders, the Hongze Lake vicinity was taken as a case study of graded flood retarding. A one and two-dimensional coupled hydrodynamic model was established to simulate flood routing in the Hongze Lake area. Fifteen different schemes involving different flood magnitudes and flood retarding operations were simulated. The results show that (1) having a flood retarding area is essential; and (2) the “graded flood retarding” scheme is superior to “no grading flood retarding” scheme; and (3) a “two-grade flood retarding” scheme is recommended.
Highlights
Climate change may lead to changes in the intensity, frequency, spatial extent, and duration of extreme weather and climatic events [1,2,3,4]
(1)are: Highest water level of Hongze Lake (HWLOH), which is the most important parameter used to describe the status of Hongze Lake
As the largest regulating reservoir of Huai River basin, Hongze Lake plays an important role in the flood safety of downstream areas
Summary
Climate change may lead to changes in the intensity, frequency, spatial extent, and duration of extreme weather and climatic events [1,2,3,4]. Increasing evidence shows that such changes in the global-scale climate system may already pose a threat to humans through increased morbidity and mortality. This is caused by heat, cold, drought, and rainfall/floods; as well as by changes in air quality, water quality, and the ecology of infectious diseases [5,6,7,8]. Flood events are expected to increase in frequency and intensity due to more frequent and extreme precipitation events and rising sea level [13,14,15,16]. China is a country prone to a variety of natural disasters, but flooding is the major meteorological disaster that affects many of its regions [17,18,19]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
