Study 5 : A Methodology To Analyse Extreme Flooding Under Future Climate Change Scenarios For Colombo

A Methodology To Analyse Extreme Flooding Under Future  Climate Change Scenarios For Colombo

By M. A. C. Niroshinie, M. S. Babel and S. Herath

  • Colombo, the commercial capital of Sri Lanka, is situated in the flood plains of the Kelani River.
  • This location makes Colombo more susceptible to flooding, particularly during the heavy rainy seasons from April to June and September to November.
  • Climate change has caused unpredictable changes in rainfall patterns in Colombo over the years.
  • The focus of this study was to analyze the potential for extreme flooding in Colombo due to climate change.
  • Future climate conditions in the Kelani basin were examined using different Global Circulation Model (GCM) data to determine extreme rainfall scenarios.
  • Modeling was conducted to assess flood inundation in Colombo under these extreme rainfall scenarios.
  • Possible adaptation measures were identified to mitigate the impacts of flooding in the area.
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