Hydrodynamic changes due to coastal reclamation activities in Daya Bay
Keywords:
hydrodynamic conditions, Finite-Volume, primitive equation community ocean model, tidal prism, water exchange capacityAbstract
Based on the geometry and surface in Daya Bay, we artificially divided the reclamation projects into three periods to analyze the influences and changes on hydrodynamic conditions as a result of the reclamation projects. Three periods of tidal current fields, tidal prisms, and water exchange capacity are simulated by the Finite-Volume, primitive equation Community Ocean Model and the characteristics and trends of hydrodynamics in Daya Bay are discussed. The combination of observation and simulation in this paper gives a good description on the tidal dynamic system in Daya Bay. As indicated by model results, the tidal current velocity in the Bay totally decreases after numerous activities associated with reclamation construction. The decreasing current velocity region is mainly distributed near the Xiachong and Gangkou chain islands. The current velocity in 2015 decreases by approximately 5 cm s−1 compared with velocities before 2000. Future reclamation activities will exacerbate these decreasing current velocity trends in some regions. Compared with 2015, the tidal prism has significantly decreased by 1.3622 × 107 m3 due to planned reclamation. The half-water exchange times for Daya Bay in 2015 and after planned reclamation are 178.9 and 177.4 days, respectively. The water exchange capacity in Fanhe Harbor is weaker than other water fields throughout Daya Bay.
References
Chen, C.
, Liu, H.
, Beardsley, R.
, 2003. An unstructured grid, finite volume, three-dimensional, primitive equations ocean model: Application to coastal ocean and estuaries. J. Atmos. Oceanic Technol. 20(1), 159–186.
Chen, C.
, Qi, J.
, Li, C.
, Beardsley R.
, Lin H.
, Walker R.
, Gates K.
, 2008. Complexity of the flooding/drying process in an estuarine tidal‐creek salt‐marsh system: An application of FVCOM. Journal of Geophysical Research Oceans 113(C7), C07052.
Hamza, W.
, Lusito, L.
, Ligorio, F.
, Tomasicchio, G.R.
, and D'Alessandro, F.
, 2018. Wave climate at shallow waters along the Abu Dhabi coast. Water 2018, 10, 985. doi:10.3390/w10080985.
Hickey, K.R.
, Healy, M.G.
, 2002. Historic Land Reclamation in the Intertidal Wetlands of the Shannon Estuary, Western Ireland. Journal of Coastal Research SI 36(4), 365–373.
Lai, Z.
, Chen C.
, Cowles G.W.
, Beardsley, R.C.
, 2010. A nonhydrostatic version of FVCOM: 1. Validation experiments [J]. Journal of Geophysical Research Oceans, 115(C11), 1–23.
Liu, Z.J.
, Liu, A.Z.
, Yu, K.C.
, 2012. The numerical analysis of the impact of reclamation on the hydrodynamic environment of Tianjin sea area. Waterway Port 33(4), 310–314.
Luff, R.
, Pohlmann, T.
, 1995. Calculation of water exchange times in the ICES-Boxes with a Eulerian dispersion model using a half-life time approach. Deutsche Hydrographische Zeitschrift 47, 287–299.
Shi, J.
, Li, G.
, Wang, P.
, 2011. Anthropogenic Influences on the Tidal Prism and Water Exchanges in Jiaozhou Bay, Qingdao, China [J]. Journal of Coastal Research, 27
(1), 57–72.
Song, D.
, Yan, Y.
, Wu, W.
, Diao, X.
, Ding, Y.
, Bao, X.
, 2016. Tidal distortion caused by the resonance of sexta-diurnal tides in a micro-mesotidal embayment [J]. Journal of Geophysical Research: Oceans, 10.10002.
Wang, C.
, Lin, J.
, Chen, P.
, Zhang, S.
, 2008. Numerical simulation on water exchange in Daya Bay [J]. South China Fisheries Science 4(4), 8
–15 (in Chinese).
Wang, X.C.
, Sun, C.Q.
, Sun, Y.L.
, Lou, A.G.
, 2000. A numerical study on the impact of reclamation on the hydrodynamic environment of Jiaozhou Bay. Marine Environmental Science 19(3), 55–59.
Wu, R.
, Cai, S.
, Wang, S.
, Zhang, W., 2007. Three-dimensional numerical simulation of tidal current and residual current at Daya Bay [J]. Journal of Tropical Oceanography 26(3), 18–23 (in Chinese).
Wu, Y.
, Tao, J.
, 1998. The calibration and verification of tide current model of Daya Bay [J]. Port Engineering Technology (1), 6–11 (in Chinese).
Yang, Y.
, Chui, T. F. M.
, 2017. Aquatic environmental changes and ecological implications from the combined effects of sea-level rise and land reclamation in Deep Bay, Pearl River Estuary, China [J]. Ecological Engineering 2017, 108, 30–39.
Zhang, L.P.
, 1997. Probing into the Problems in Environmental Impact Assessment of Harbor Reclamation or Reclamation Project. Fujian Environment. 14(3), 8–9.
Published
Issue
Section
License
Manuscripts must be original. They must not be published or be under consideration for publication elsewhere, in whole or in part. It is required that the lead author of accepted papers complete and sign the MSU Press AEHM Author Publishing Agreement and provide it to the publisher upon acceptance.
