Hong Kong 2100: Factors of “Worst-Case Scenario” Flooding and a Flood Map

Hon Chim Chiu, Ho Yin Aggie Chan

Research output: Contribution to specialist publicationArticle


This study aims to analyse the potential flood risk factors that may affect Hong Kong in the year 2100. The ones considered for this study include storm surges, rainstorms, tidal changes, sea level rises, crustal subsidence, and land subsidence. The authors calculated the increased water levels associated with each factor additively to obtain a theoretical worst-case scenario. The authors predict that flood levels in 2100 would be around six metres and affect an estimated 1,637,302 people and produce a 2100 flood map. Their findings should provide useful information for policymakers and stakeholders when they discuss developing flood prevention measures and development projects located in high-risk areas.
Original languageEnglish
Number of pages13
Specialist publicationSurveying and Built Environment
PublisherThe Hong Kong Institute of Surveyors
Publication statusPublished - Sept 2023


  • Flood risk
  • Coastal hazards
  • Hong Kong
  • GIS analysis
  • Meteorological hazards


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