LAUSR

Abstract In most of the cases natural hazard risk assessment commonly focuses on a single hazard occurs in a particular region such as flood, landslide, or cyclones. However, many locations on the earth surface are very much prone and experiencing multiple hazards in a row with cascading effect. For proper assessment of such extreme events and its risk exposure, multi-hazards modeling is required greeting the combination of several hazards occurring in a particular place. Coastal West Bengal, India has constantly facing the heat of multiple hazards, which has been fundamentally induced by tropical cyclones in this region. Storm and tidal surge, embankment breaching, inundation, salinization are the common phenomena during and aftermath of such devastating cyclones. In the present study, analytical hierarchy process (AHP) supported RS-GIS has been initiated to assess the risk and vulnerability at micro level. The evaluated multi-hazards assessment has been categorized in five classes, namely, very high, high, moderate, low and very low. The most multi-hazards risk has been found in the western part of Sagar, Namkhana blocks and the south and eastern part of Pathar Pratima have very highly exposed to multi-hazards surrounded by Hugli , Muriganga and Saptamukhi rivers, which are basically tidal rivers. Though the data scarce is evident in the study region, satellite dataset and other secondary dataset from Government level with field survey assist to assess in the identification of multi- hazards risk zone for further decision making and routine monitoring and multi-hazards assessment must be done in regular framework.