LI Yongkun1, ZHAO Xiaowei1,2, YANG Zhongshan2, ZANG Min2, FU Chunmei3
Background
The persistent high frequency of extreme rainstorms has significantly increased the challenges associated with urban flood disaster prevention, posing considerable difficulties for flood control and drainage operations in mega cities such as Beijing.
Intensive human activities in mega city results in drastic change of underlying surfaces, runoff generation/ concentration conditions, causing frequent localized heavy rainstorms.
Substantial research on urban flood has been conducted after the Rainstorm “2012.7.21” in Beijing, while multi-level analysis of the city's flood evolution and operational patterns from the perspective of extreme rainfall, urban flood, and flood peak staggered regulation remain scarce.