Kerala experienced many small and large flood and landslide events. From 15th to 18th August 2018 the worst flood event ever since 1924 was occurred. This study was to understand the impact on Riparian vegetation in the Pamba, Periyar, Chalakkudi and Bharathapuzha rivers. A rapid assessment method was used. This paper provides the executive summary of ten detailed research report supported by Kerala State Biodiversity Board.