Comprehensive Zoning Strategies for Flood Disasters in China

Author:

Li Huipan1ORCID,Wang Yuan1ORCID,Ping Liying1ORCID,Li Na1ORCID,Zhao Peng1ORCID

Affiliation:

1. School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China

Abstract

The frequency of global floods has increased, posing significant threats to economic development and human safety. Existing flood risk zoning studies in disaster prevention lack integration of the natural–economic–social chain and urban resilience factors. This study addresses this gap by constructing flood disaster risk and intensity indices using data from 31 provinces and 295 prefectural-level cities in China from 2011 to 2022. These indices incorporate natural (rainfall), economic (GDP), and social (population, built-up area) indicators to assess the flood likelihood and loss degree, providing comprehensive risk and intensity ratings. The study also examines the impact of resilience factors—environmental (green space), infrastructural (rainwater pipeline density), and natural resource (watershed areas)—on flood intensity. Findings reveal that high-risk regions are mainly in the Yangtze River Basin and southern regions, while high-intensity regions are primarily in the middle and lower Yangtze River and certain northwestern cities. Increasing rainwater pipeline density mitigates flood impacts in high-risk, high-intensity areas, while expanding green spaces and pipelines are effective in high-risk, low-intensity regions. This paper proposes a comprehensive flood hazard zoning mechanism integrating natural, economic, and social factors with urban resilience, offering insights and a scientific basis for urban flood management.

Funder

National Key Research and Development Program of China

Postgraduate Arts and Sciences Top-notch Innovation Award Program for 2023 of Tianjin University

Joint research project on ecological protection and high-quality development in the Yellow River Basin

Publisher

MDPI AG

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