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June 11, 2026International Journal of Disaster Risk ScienceOpen Access

Mapping Coastal Flood Risk in China

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Authors

JBJie BianBeijing Normal UniversityQZQing ZhouGuangzhou Urban Planning Survey & Design InstituteLDLi DantongChina Institute of Electronics

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Overview

Quantitative assessment reveals significant coastal flood risks, emphasizing urgent disaster management needs in urban areas.

Key Points

  • This study aims to assess the risk of casualties and economic losses due to coastal flooding in China.
  • Utilized the LISFLOOD-FP hydraulic model with a 30-m spatial resolution for simulations.
  • Employed historical data from 65 tide-gauge stations to estimate extreme water levels for return periods of 20 to 500 years.
  • Quantified population casualty rates and economic losses using inundation depth-damage curves under different flooding scenarios.
  • Under the 500-year return period, 20,983 km² of coastal area is flooded across 11 provinces.
  • Casualties are estimated at 176,000, with economic losses totaling CNY 303.8 billion (approximately USD 42.2 billion).
  • Severe impacts are predominantly concentrated in low-lying urban areas, including the Bohai Rim, Yangtze River Delta, and Pearl River Delta.

Cite This Study

Bian et al. (2026) studied this question.

synapsesocial.com/papers/6a2a523480c8f91e7f39e32bhttps://doi.org/10.1007/s13753-026-00742-w
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