Flood risk assessment in the Kosi megafan using multi-criteria decision analysis: A hydro-geomorphic approach

摘要: Abstract Floods are one of the most devastating natural events that lead to enormous and recurring loss life, properties, resources around globe. In India, floods remain a major hazard during monsoon season in many parts country but seriously flat monotonous Gangetic plains Himalayan foreland. One flood-prone rivers India is Kosi north Bihar, eastern which also forms largest active megafan world. The River known as “sorrow Bihar” because its anomalous behavior damage it causes due frequent this region. This study evaluates flood vulnerability separate entities combines them assess risk Geomorphological, hydrological, socio-economic data have been integrated GIS framework using multi-criteria decision tool called Analytical Hierarchy Process (AHP) generate process-based map for 105 blocks (administrative units) both Nepal (Bihar). Such maps should encourage soft engineering solutions mitigation aimed at minimizing consequences flooding reducing risks. has significant implications developing measures plans will help government relief agencies identification areas planning emergency management strategies