Study on Risk Assessment and Prevention Strategy of Zhengzhou City Flood

Abstract

With the acceleration of global climate change and urbanization, urban flooding has become a major challenge hindering sustainable urban development. Taking Zhengzhou, a national central city, as a case study, this paper systematically analyzes the causes, mechanisms, and risk characteristics of urban flooding, while evaluating the effectiveness and shortcomings of existing prevention systems. The research reveals that Zhengzhou's flood risks primarily stem from multiple factors: increased extreme rainfall due to climate change, altered hydrological effects from urban expansion, and delayed drainage system development. To address these issues, the study proposes a comprehensive prevention framework integrating engineering and non-engineering measures, along with governance strategies based on the principles of "source reduction, pipeline drainage, combined storage and drainage, and emergency response for exceedance." The findings provide theoretical foundations and practical references for enhancing flood prevention capabilities in Zhengzhou, while also offering valuable insights for similar cities in flood management.