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Assessing the nature of sediment transport with bridge scour by 1D sediment transport model in the sub-catchment basin of Bhagirathi–Hooghly river
- Source :
- Modeling Earth Systems and Environment. 7:2823-2845
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- Sediment deposition is a significant feature of a dynamic floodplain river. As the river's carrying capacity decreases, it is forced to deposit sediment on the river bed. However, due to the construction of some hydraulic structures over the river bed at different times (bridges, dams), the velocity of the river in the floodplain area decreases with accelerating sedimentation process, which hinders water transport. The sub-catchment basin (Nabadwip-Kalyani stretch) of the Bhagirathi–Hooghly river in West Bengal (Ghosh et al. 2020), India is frequently used as a means of water transport by local stakeholders. Because of sedimentation, the thalweg depth of the river is constantly decreasing in Nabadwip–Kalyani stretch and the water transport is being disrupted. Therefore, it is very important to know the function of hydraulic structures over the river bathymetry and resultant sediment flow, transportation, and sediment deposition in this region. Therefore, this article mainly assesses to develop a 1D hydro-dynamic sediment transport model on river morphological change through seasonal quasi-unsteady flow accumulation and sediment budget in a given year (2018). The hydro-dynamic model is calibrated by 1D HEC-RAS v 5.0.7 software (Gibson et al. 2017) based on seasonal quasi-unsteady flow using various empirical equations and Manning's roughness coefficient and validated with R2, NSE, and RSR. The model also examines the role of hydrodynamic structures in scouring and sedimentation due to the location of these structures above the river. This model output will help local stakeholders to understand the amount of sediment in the river and keep river transport viable in all seasons.
- Subjects :
- Hydrology
geography
geography.geographical_feature_category
Water transport
010504 meteorology & atmospheric sciences
Floodplain
0208 environmental biotechnology
Drainage basin
Sediment
02 engineering and technology
Sedimentation
01 natural sciences
020801 environmental engineering
Thalweg
Environmental science
Computers in Earth Sciences
Statistics, Probability and Uncertainty
General Agricultural and Biological Sciences
Sediment transport
Sedimentary budget
0105 earth and related environmental sciences
General Environmental Science
Subjects
Details
- ISSN :
- 23636211 and 23636203
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- Modeling Earth Systems and Environment
- Accession number :
- edsair.doi...........6e4ffffbba4bf9626b84a9a72ebfe6e8