1,- 1Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, 826004, Jharkhand, India (22dr0275@iitism.ac.in)
- 2Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, 826004, Jharkhand, India (bandita@iitism.ac.in)
- 3Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, 826004, Jharkhand, India (tineshpathania@iitism.ac.in)
- 4Centre for Water Resource Management, Indian Institute of Technology (Indian School of Mines) Dhanbad, 826004, Jharkhand, India
The increasing demand for river sediments to meet the needs of rapid urbanization, industrial development, and economic growth has posed significant challenges to several major river systems (Bendixen et al., 2019). Studies have shown that unregulated mining of sand and gravel from rivers can have negative impacts on the morphology, environment, and hydraulic structures located nearby (Rentier and Cammeraat, 2022). The formation of a pit after the extraction of sediment from the river bed is known to influence the local flow and sediment transport processes. These alterations in the hydro-morphodynamic characteristics result in the migration of the mining pit and bed degradation downstream. The advancements in instrumentation and computational modeling techniques have allowed researchers and practitioners to better understand the flow and sediment dynamics near mining locations (Mishra et al., 2024). The literature suggests that the approach used to model mining activities in previous studies generally involved changes to the bed corresponding to the extracted sediment volume at the initial stage. However, in scenarios with in-channel sediment mining activity occurring along with flow over a certain time period, pit formation is gradual (Nguyen et al., 2025). Therefore, in this study, we used the TELEMAC-2D hydrodynamic solver coupled with the GAIA sediment transport model to simulate the impact of gradual mining activity on the hydro-morphodynamics. The results provide insight into sediment transport and bed evolution in the vicinity of the gradual sand extraction site.
References
Bendixen, M., Best, J., Hackney, C., & Iversen, L. L. (2019). Time is running out for sand. Nature, 571(7763), 29-31.
Mishra, R. K., Barman, B., & Pathania, T. (2024). Three-dimensional modeling of hydro-morphodynamic characteristics of mining affected alluvial channel using TELEMAC and GAIA. Physics of Fluids, 36(10).
Nguyen, B. Q., Kantoush, S. A., & Sumi, T. (2025). Assessing the multidimensional impacts of riverbed sand mining on geomorphological change and water transfer rate: A comprehensive investigation of Central Vietnam’s Vu Gia Thu Bon River system. Journal of Hydrology, 654, 132853.
Rentier, E. S., & Cammeraat, L. H. (2022). The environmental impacts of river sand mining. Science of the Total environment, 838, 155877.
How to cite: Mishra, R. K., Barman, B., and Pathania, T.: Numerical Modeling of Gradual Sand Extraction from an Active Alluvial Channel, EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-16300, https://doi.org/10.5194/egusphere-egu26-16300, 2026.
