Abstract: River banks though being the most fertile region for cultivation, it has become a concern for loss of livelihood as well as settlement during the flood. The inundation of land is reflected with massive river bank erosion thereby causing land loss. The river lower Subansiri exhibit a loads of sediment getting deposited and flooding the flood area leading to massive river bank erosion. The paper explores the impact of land loss due to river flood and substantiate with mapping different study period.