Author(s): Indu Bhushan Bhagat and Brahamdeo Kumar Yadav

Abstract: Samastipur district of Bihar is facing the problem of floods every year. Most areas are submerged in the water for 4 to 5 months in the monsoon season. Water spread mapping is used to find out the total water submerged area of Samastipur during pre-monsoon and post-monsoon seasons to calculate the differences in the study area for future planning of policy making. This study has mapped water spread areas in Samastipur, situated in Bihar, from 2018 to 2021 (pre-monsoon and post-monsoon) using Landsat-8 OLI satellite imagery. Water spread areas were evaluated based on the band rationing indices, namely Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), Modified Normalized Difference Water Index (MNDWI), Water Ratio Index (WRI). The results suggested a significant increasing trend in the water surface area of Samastipur for the period 2018 to 2021.The maximum differenced values of NDVI, NDWI, MNDWI and WRI were 165.42 km2, 220.6386 km2, 391.8456 km2 and 90.9117 km2 respectively in 2021. The minimum differenced values of NDVI, NDWI, MNDWI and WRI were 15.954 km2, 10.0179 km2, 17.208 km2 and 14.0526 km2 respectively in 2018. The general trend of indices value is WRI
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How to cite this article:

Indu Bhushan Bhagat, Brahamdeo Kumar Yadav. Water spread mapping using remote sensing and geographic information system (GIS) techniques for Samastipur, Bihar. Int J Stat Appl Math 2023;8(6S):1373-1378.