Monitoring flash flood using Optical and Microwave Sensor dataset:- A case study of Cachar district, Assam (India)

Flash flood is one of the world’s most devastating and repeated natural hazards which severely damage the infrastructure and livelihood and also displaced millions of people each year. It is the most widespread hydrological hazard worldwide, impacting various ecological elements and applications associated with water management, natural resources, agriculture, human health, and economics. Flood damage assessment is crucial in gauging damage and estimating economic loss due to floods. The current practice of flood crop loss evaluation has become laborious, very generalized, and overlong due to the dependency survey-primarily based information collection. Remote sensing data availability makes expeditive flood loss assessment possible. Sentinel-1C-Band SAR (Synthetic Aperture Rader) and Sentinel 2 data collected from the ESA (European Space Agency) of the study area during the flooded period were analysed using geospatial techniques. The data sets used for the study were collected during the flood and were processed using Sentinel Toolbox in SNAP.