Author(s): Ravi Kumar Mishra; Bandita Barman; Tinesh Pathania
Linked Author(s): Bandita Barman
Keywords: Numerical modeling River morphology Sand mining Sediment transport TELEMAC-3D-GAI
Abstract: The mining of sediments from rivers has become more prevalent over the years due to economic growth and infrastructure development. Unregulated sediment extraction may adversely affect river morphology, ecology, and nearby hydraulic structures. This study utilizes the TELEMAC-3D-GAIA model to examine the hydro-morphodynamic changes caused by the presence of mining pit at a channel confluence. It was observed that the pit located downstream of the confluence influenced the morphological evolution. The erosion of the channel bed was more significant and the extent of bed lowering reached further downstream in the scenario with a mining pit. The changes in hydro-morphodynamic characteristics can be attributed to the complex interplay of flow, turbulence, and sediment transport mechanisms at the confluence, which are further complicated by the existence of a mining pit.
Year: 2025