The ancient civilizations evolved from the river valleys like the Indus, Nile, and Tigris-Euphrates, which signifies a potential relation between man and environment. Bank erosion takes place when the river water overflows its banks, ultimately leading to widening of channels and bankline migration. This chapter tries to analyze the riverbank erosion of the Brahmaputra River in the Morigaon district of Assam using geospatial technology. The satellite imageries are LANDSAT 4–5, LANDSAT 7 ETM, and LANDSAT 8 OLI & TIRS for the years 1990, 2000, 2010, and 2020. It has been perceived that the bankline of the Brahmaputra River has changed and migrated toward the southern part of the district. During the year 1990, the river eroded about 109.01 sq km, 143.56 sq km in 2000, 177.50 sq km in 2010, and 214.69 sq km in 2020. More than 94 villages were wrecked, and people became homeless, but unfortunately, there are no serious efforts taken by the governments. Therefore, to work with massive erosion protection, traditional-style porcupine spars should be used in order to minimize the rate of erosion.