Objectives of the study
The disastrous 7.20 heavy rainstorm in Zhengzhou has brought about freshchallenges to ensuring the safety of operations in the city Beijing and Zhengzhou share similarities in terms of weather patterns, terrain, topography,and vulnerability to floods. By transferring the rainstorm scenario from Zhengzhou to Beijing, valuable insights can be gained to better manage the impact of extreme flood disasters in the capital. Adopting the concept of "rainstorm transplantation scenario constructionrisk analysis" and guided by the principle of considering the most unfavorableyet plausible scenarios, this research establishes a comprehensive scenarioinvolving urban rainstorms and the discharge of the North Canal. A model isdeveloped to assess the risks associated with urban rainstorms and flooddisasters This model quantifies the level of flood risk during extremerainstorm scenarios in Beijing, while also pinpointing areas prone to inundationand key zones of heightened risk. The analysis takes into account variousfactors including subway entrances, low lying courtyards, population density,economic activities, and road waterlogging. To counter these challenges, thestudy introduces the 31631 defense strategy and proposes specificpreventive measures tailored to the specific circumstances at hand