Acknowledgements
The first Author is an awardee of the Council of Scientific and Industrial Research (CSIR) research associateship [HRDG(CSIR) sanction letter no./file no.: 09/079(2836)2019-EMR-I]. The author acknowledges CSIR for the same. The authors would like to thank Dr. G. Maitra, Tezpur University for checking the manuscript. The authors gratefully acknowledge the United States Geological Survey (USGS) as the source for Landsat, Sentinel, and SRTM DEM data. Interpretations are made from the flood hazard map of Assam prepared by the National Remote Sensing Centre (NRSC), ISRO, Govt. of India. We acknowledge NRSC for the same.