Development of flood inundation maps for the Chaliyar Basin, Kerala under climate change scenarios

Abstract Floods are one of the extreme events and widespread natural disasters that significantly affect civil infrastructure livelihood people. Recently, climate change has affected rainfall pattern increased flood worldwide, especially in India. Therefore, it become essential to map potential inundation regions for various future developing appropriate mitigation management strategies. This study aims develop maps different return periods under scenarios Chaliyar basin, Kerala. An Hydrologic Engineering Center-Hydrologic Modelling System (HEC-HMS) is developed simulate streamflow SSP2-4.5 SSP5-8.5 scenarios. Later, using Center-River Analysis model. It observed near (2031–2040) far (2071–2080), simulated higher SSP5-8.5. However, mid-future (2051–2060) resulted a than scenario. A maximum 19.52 m water surface elevation occurred at Kizhupparamba during SSP2-4.5, followed by 18.38 Cheekode SSP5-8.5, 100-year period events. showed hydrologic hydraulic models could be effectively combined mapping areas.