![]() The oscillation of the meandering river through lateral migration causes a rapid change in the local area. By the course of flood and its alteration, the curvature extends gradually and effects over morphological changes in the river. The change in meander bend also alters the planform geometry of floodplain morphology. The freely meandering river has a curved channel, which shifts laterally by erosion in the concave side and deposition as point bar on the convex side. These meandering processes also affect enhanced land-use change and threatened outcome towards riverside biota and ecosystem. The dynamic nature of the river channel shifts lateral or horizontal in the floodplain area with time. The study of these meandering processes and its effect in the floodplain area is the main focus of river dynamics. The old phrase of the river channel in the floodplain area exhibits the formation of the meander and river meandering process. Rivers represents a remarkable morphometric landscape over the alluvium floodplain area. The study predicts future centerline of the meandering channel and the information on river migration, which will contribute to the plan on bank erosion and denote the vulnerable zonation. The unpredictable behaviour of the migration shows a rapid change of meandering geometry through the increasing nature of bank erosion possibilities with peak discharge during monsoon. ![]() The oscillation character of meander signifies the amount of discharge in the sub-catchment basin. The simulated and predicted centerline validates by positive linear relation (R 2) and lowest RMSE value in few cross-sectional areas. This model indicates the trend of channel width decreasing, with increasing near bank velocity in the crescent of meandering bend in future. The spatial and temporal shifting of river centerline and resultant migration observes and predicts through the migration coefficient approach (Hasegawa in Proceedings of the Hokkaido Branch, Japan Society of Civil Engineering, pp 197–202, 1977 Ikeda et al. The study area is divided into 30 cross-sections, which reveals the increasing trend of lateral migration and erosion behaviour towards the eastward section of this region. The present study elaborates on the migration tendencies and meandering geometry of this zone and tries to predict the future river centerline position in a sinuous course. Illegal sand mining and monsoonal flood enhances the meandering process and triggers the reduction of settlement and cropland. This region is experiencing a favourable geomorphic change through river bank line changing with bank erosion and sinuous meandering. The present sub-catchment basin (Nabadwip–Kalyani stretch) of the Bhagirathi-Hooghly river is a vital lifeline of southern West Bengal, which offers adequate water for irrigation, industrialisation, and human habitation. ![]() Though it is a natural process, it affects the populace by the resultant effect of lateral migration with bank erosion in the floodplain area. Meandering is the winding curve or bends in a river within the floodplain area. ![]()
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