Volume 6 Issue 2
Apr.  2013
Turn off MathJax
Article Contents
Article Navigation >  Water Science and Engineering  > 2013  >  6(2): 178-188
Viet-Thanh NGUYEN, Jin-hai ZHENG, Ji-sheng ZHANG. 2013: Mechanism of back siltation in navigation channel in Dinh An Estuary, Vietnam. Water Science and Engineering, 6(2): 178-188. doi: 10.3882/j.issn.1674-2370.2013.02.006
Citation: Viet-Thanh NGUYEN, Jin-hai ZHENG, Ji-sheng ZHANG. 2013: Mechanism of back siltation in navigation channel in Dinh An Estuary, Vietnam. Water Science and Engineering, 6(2): 178-188. doi: 10.3882/j.issn.1674-2370.2013.02.006
shu

Mechanism of back siltation in navigation channel in Dinh An Estuary, Vietnam

doi: 10.3882/j.issn.1674-2370.2013.02.006
  • 1.

    State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China

  • 2.

    College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, P. R. China

  • 3.

    Faculty of Civil Engineering, University of Transport and Communications, Hanoi, Vietnam

Funds:  This work was supported by the 322 Project of Vietnam International Education Development, Ministry of Education and Training, Vietnam (Grant No. 322), the Qing Lan Project, the 333 Project of Jiangsu Province (Grant No. BRA2012130), the Fundamental Research Funds for the Central Universities (Grant No. 2012B06514), and the 111 Project (Grant No. B12032).
More Information
  • Corresponding author: Jin-hai ZHENG
  • Received Date: 2012-08-31
  • Rev Recd Date: 2013-02-21
    Abstract
  • The Dinh An Estuary is one of the Nine Dragon estuaries of the Mekong River. An international navigation channel was built in the estuary for vessels traveling from the South China Sea to the southwestern area of Vietnam and then to Phnom Penh, Cambodia. The morphological evolution of the navigation channel is complicated and unstable. The back siltation intensity in the navigation channel has largely increased and been concentrated in the curvature segments of the channel since 1980. In this study, based on simulation results and measured data, five key factors that influence the back siltation in the navigation channel were systematically analyzed. These factors included the increasing elevation gap between the channel and the nearby seabed, the disadvantageous hydrodynamic conditions, sediment transport, mixing of saltwater and freshwater, and wave effects in the navigation channel. It is shown that the back siltation to a large extent results from the low current velocity of the secondary ocean circulation, which often occurs in the curvature segments of the channel. Suspended sediment also settles in the channel due to the decrease of the current velocity and the sediment transport capacity when flow passes through the channel. The changes of hydrodynamic conditions are responsible for the majority of the severe siltation in the curvature segments of the navigation channel.

     

    • FullText(HTML)
  • loading
    • References(19)
  • An, N. N. 1994. Numerical Model to Simulate the Hydrodynamic and Proposed Regulation Scheme to Improvement Navigation Channel in Dinh An Estuary. Ho Chi Minh City: Ho Chi Minh City University of Technology. (in Vietnamese)
    An, T. V. 2005. Study the Solutions to Stabilized Bed of Channel in Dinh An Estuary Service to Waterway Transport. Hanoi: Vietnam Ministry of Science and Technology, Hanoi, Vietnam. (in Vietnamese)
    Hau, L. P. 2005. Estuarine Hydrodynamic and Engineering. Hanoi: Construction Publishing. (In Vietnamese)
    Hung, L. M. 1988. Morphological Evolution of Dinh An Estuary Before and After Dredging. Hanoi: Ministry of Transport. (in Vietnamese)
    Nguyen, T. V., and Tanaka, H. 2007. Study on the effect of morphology change on salinity distribution in the Dinh An Estuary, Lower Mekong River of Vietnam. Journal of Coastal Research, (50), 268-272.
    Nguyen, V. T., Zheng J. H., and Luong, P. H. 2011. Morphological evolution of navigation channel in Dinh An estuary, Vietnam. Proceedings of The 7th IAHR Symposium on River, Coastal and Estuarine Morphodynamics, 486-492. Beijing: Tsinghua University Press.
    Nguyen, T. V. 2012. Morphological Evolution and Back Siltation of Navigation Channel in Dinh An Estuary, Mekong River Delta: Understanding, Modelling and Soluting. Ph. D. Dissertation. Nanjing: Hohai University.
    Portcoast Consultant Corporation. 2006. Feasibility Project of Waterway for Heavy-Tonnages Ships to Enter the Hau River. Ho Chi Minh City: Portcoast Consultant Corporation. (in Vietnamese)
    Portcoast Consultant Corporation, Nippon Koei Vietnam International LLC, and DHI Water and Environment. 2009. Modelling Report, Project of Waterway for Heavy-Tonnages Ships to Enter the Hau River. Hanoi: Project Management Unit of Waterway, Vietnam Ministry of Transport. (in Vietnamese)
    Savenije, H. G. 2005. Salinity and Tides in Alluvial Estuaries. The Netherlands: Elsevier.
    Shao, Y. Y., Yan, Y. X., and Maa, J. P. Y. 2011. In situ measurements of settling velocity near Baimao shoal in Changjiang Estuary. ASCE Journal of Hydraulic Engineering, 137(3), 372-380. [doi:10.1061/(ASCE) HY.1943-7900.0000312]
    Thuy, N. N. 1989. Hydrodynamic Modeling of the Propagation of Tidal Waves in the River System of the Mekong Delta. Moscow: State Oceanographic Institute. (in Russian)
    van Rijn, L. C. 2004. Estuarine and coastal sedimentation problems. International Journal of Sediment Research, 20(1), 39-51.
    Warner, J. C., Schoellhamer, D. H., Burau, J. R., and Schladow, S. G. 2006. Flow convergence caused by a salinity minimum in a tidal channel. San Francisco Estuary and Watershed Science, 4(3), 91-102.
    Wolanski, E., Nguyen, N. H., Le, T. D., Nguyen, H. N., and Nguyen, N. T. 1996. Fine-sediment dynamics in the Mekong River Estuary, Vietnam. Estuarine, Coastal and Shelf Science, 43(5), 565-582. [doi: org/10.1006/ecss.1996.0088].
    Zhang, C., Zheng, J. H., Wang, Y. G., Zhang, M. T., Jeng, D. S., and Zhang, J. S. 2011. A process-based model for sediment transport under various wave and current conditions. International Journal of Sediment Research, 26(4), 498-512. [doi: 10.1016/S1001-6279(12)60008-0]
    Zhang, W., Wei, X. Y., Zheng, J. H., Zhu, Y. L., and Zhang, Y. J. 2012. Estimating suspended sediment loads in the Pearl River Delta region using sediment rating curves. Continental Shelf Research, 38, 35-46. [doi: 10.1016/j.csr.2012.02.017]
    Zheng, J. H., Yan, Y. X., and Zhu, Y. L. 2002. Three dimensional baroclinic numerical model for simulating fresh and salt water mixing in the Yangtze Estuary. China Ocean Engineering, 16(2), 227-238.
    Zheng, J. H., Mase, H., Demirbilek, Z., and Lin, L. H. 2008. Implementation and evaluation of alternative wave breaking formulas in a coastal spectral wave model. Ocean Engineering, 35(11-12), 1090-1101. [doi: 10.1016/j.oceaneng.2008.05.001]
    • Relative Articles
    • Supplements(0)
    • Cited By
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索
    Get Citation
    PDF
    XML

    Article Metrics

    Article views (2372) PDF downloads(3609) Cited by()
    Proportional views
    Related

    Copyright © 2009 Editorial office of Water Science and Engineering 苏ICP备12023610号-1

    Supported by: Beijing Renhe Information Technology Co. Ltd   support: info@rhhz.net

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return