In order to understand whether coastal cities are more prone to flooding due to tidal events or extreme rainfall, a research team from IIT Bombay has devised a new measure called the “Tide–Rainfall Flood Quotient”.
♦ Using past rainfall data, tide data and the topography of the area, this framework can be used to determine the main factors at play.
♦ The team selected three coastal areas that are geographically diverse and vulnerable to flooding-Mithi catchment area in Mumbai, Jagatsinghpur district in Odisha and Greater Chennai Corporation in Tamil Nadu to test their new metric
♦ The new method helps to classify these areas as ‘storm-tide dominated’ or ‘pluvial (rainfall) dominated’.
♦ This metric can help disaster management experts develop better flood risk management systems for long-term planning.