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The influence of main channel velocity and water depth changes on the hydrodynamic characteristics of lateral water intake in a tidal channel
Wang, S.; Bi, Q.; He, W.; Zhang, J. (2023). The influence of main channel velocity and water depth changes on the hydrodynamic characteristics of lateral water intake in a tidal channel. Water Science and Technology-Water Supply 23(3): 1026-1040. https://dx.doi.org/10.2166/ws.2023.053
In: Water Science and Technology-Water Supply. IWA Publishing: London. ISSN 1606-9749
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| Author keywords |
lateral intake; main channel; numerical simulation; TELEMAC-3D; water depth |
| Auteurs | | Top |
- Wang, S.
- Bi, Q.
- He, W.
- Zhang, J.
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| Abstract |
A tidal channel will be affected by the intrusion of seawater, so the current and water depth in the channel will change at every moment. These changes are critical to the hydrodynamic characteristics of water intakes in tidal rivers. This paper establishes a 3D model and validates it through laboratory models, then analyzes the influences of dynamic change of flow velocity and water depth, and the amplitude changes of velocity and water depth on the secondary flow in the water withdrawal process. With the increase of the main flow velocity and the decrease of the water depth, diversion width at the water intake decreases, the peak velocity increases, and the intensity of the secondary flow also increases. With the increase of the velocity of the main channel and the changing rate in water depth, the lag time of the velocity change at the water intake is also longer, and the peak velocity will be greater than the velocity of the constant flow. The influence of the water depth change is greater than that of the main channel velocity change. Combining these four factors, more sand may be washed into the inlet channel under conditions of high flow and low water depth. |
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