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Article

A Study on the Response of the Hydrodynamic Environment to the Morphology of Radial Sand Ridges in the Coastal Waters of Jiangsu

1
Department of Hydrology and Water Resources, Hohai University, Nanjing 210098, China
2
Appraisal Center for Environment and Engineering, The Ministry of Ecology and Environment of China, Beijing 100012, China
3
Nanjing Hohai Technology Company, Hohai University, Nanjing 210098, China
4
Water Resource and Hydropower Planning and Design General Institute, Beijing 100120, China
5
Wuchuan Water Environment Company, Shanghai 200235, China
6
Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, China
*
Author to whom correspondence should be addressed.
Water 2019, 11(10), 2190; https://doi.org/10.3390/w11102190
Received: 21 August 2019 / Revised: 14 October 2019 / Accepted: 16 October 2019 / Published: 21 October 2019
(This article belongs to the Special Issue Wetland Ecohydrology and Water Resource Management)
A two-dimensional hydrodynamic model for the waters off the coast of Jiangsu, where there are radial sand ridges (RSRs) (hereinafter, the RSR area), was established based on measured topographic, tide level and tidal current data. Considering the complex topographic and geomorphic characteristics of the RSR group in this area, an unstructured grid was used for the calculation. A four-layer refinement was applied to the grid from outside to inside to better fit the complex topography. The simulations were performed to examine the response of the hydrodynamic environment to the morphology of the RSRs in three scenarios, namely, when there are natural RSRs, no RSRs, and partially reclaimed RSRs. When there are no or partially reclaimed RSRs, the tidal current field still exists in a radial pattern in the RSR area. The radial tidal current field is relatively stable and is not controlled by the morphologies of the RSRs. The topographic changes do not alter the distribution pattern of the radial tidal current field but do affect the local current fields. When there are no RSRs, the flood currents can directly reach Jianggang. Under practical conditions, the RSRs block the tidal currents during a flood tide to some extent. This phenomenon is particularly pronounced when the RSRs are partially reclaimed. For example, during an ebb tide, when the tidal currents encounter sand ridges or reclamation areas, their streamlines bend, and they flow around the obstacles. This change will affect the material transport, sediment deposition and seabed erosion. View Full-Text
Keywords: RSRs; hydrodynamic model; numerical simulation; Jiangsu RSRs; hydrodynamic model; numerical simulation; Jiangsu
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MDPI and ACS Style

Qi, C.; Ma, L.; Wang, Q.; Zhai, Y.; Li, J.; Zhang, H. A Study on the Response of the Hydrodynamic Environment to the Morphology of Radial Sand Ridges in the Coastal Waters of Jiangsu. Water 2019, 11, 2190. https://doi.org/10.3390/w11102190

AMA Style

Qi C, Ma L, Wang Q, Zhai Y, Li J, Zhang H. A Study on the Response of the Hydrodynamic Environment to the Morphology of Radial Sand Ridges in the Coastal Waters of Jiangsu. Water. 2019; 11(10):2190. https://doi.org/10.3390/w11102190

Chicago/Turabian Style

Qi, Changjun, Lejun Ma, Qinggai Wang, Yuan Zhai, Jixuan Li, and Hanwen Zhang. 2019. "A Study on the Response of the Hydrodynamic Environment to the Morphology of Radial Sand Ridges in the Coastal Waters of Jiangsu" Water 11, no. 10: 2190. https://doi.org/10.3390/w11102190

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