Abstract
River bank erosion is a naturally occurring process along the lower parts of the River and Delta. Constant erosion and deposition due to natural and anthropogenic causes the River to migrate constantly and creating new geomorphological process. Numerical modelling helps in analyzing complex physical changes that occurred in a particular area. It can play a dominant role in studying the erosion and depositional rate along the River banks with higher accuracy. The current research is focussed on assessing the Geomorphological evolution and River bank shifting for the parts of the Bhagirathi River through numerical methods. A Survey of India's topographical maps is taken as a baseline for the study. The River bank was digitized from multi-temporal LANDSAT data from (1990–2018) at five years of temporal interval. The spatial variation in accretion and erosion rate was classified into five different types, namely: Extreme Erosion, High erosion, No change, High deposition, and Extreme deposition. The analysis revealed that both Extreme erosion and deposition were present during all of the study years. Both the east and west bank undergoes the River change at different rate for each period. The highest rate of erosion (−149 mts) and deposition (278 mts) for the west bank of the River was observed between the year (2005–2011) and (2015–2018). The highest rate of erosion (−168 mts) and deposition (375 mts) for the east bank of the River was observed between the year (2015–2018) and (1995–2000).
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Prakasam, C., Aravinth, R. (2022). Application of Numerical Modelling for Geomorphological Evolution and River Bank Shifting Part of Damodar River. In: Jha, R., Singh, V.P., Singh, V., Roy, L.B., Thendiyath, R. (eds) Hydrological Modeling. Water Science and Technology Library, vol 109. Springer, Cham. https://doi.org/10.1007/978-3-030-81358-1_28
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