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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/106985

    Title: Tide-induced groundwater level fluctuation in a U-shaped coastal aquifer
    Authors: Fu-Kuo Huang;Mo-Hsiung Chuang;Grace S. Wang;Hund-Der Yeh
    Keywords: Coastal aquifer;U-shaped coastline;Shoreline length;Tidal wave interaction;Sensitivity analysis
    Date: 2015-10-01
    Issue Date: 2016-08-15
    Publisher: Elsevier BV
    Abstract: The prediction of groundwater level fluctuation due to tidal waves propagation in coastal aquifers is
    important for the planning and management of water resources in coastal areas. A two-dimensional
    (2-D) analytical solution is derived to describe the tidal groundwater fluctuation in an aquifer bounded
    by three water–land boundaries that form a U-shaped coastline. Two opposite sides represent estuary–
    land boundaries on which the amplitude attenuation and phase shift of the tidal movement in the estuary
    are considered while the third side is an ocean–land boundary. The effects of wave interaction due to the
    propagation of oscillating oceanic tides in the cross-shore direction inland and the transmission of the
    two opposite estuarine tides in the along-shore direction are investigated. Three existing headfluctuation
    solutions can be considered as special cases of the present solution; one is for onedimensional
    flow and the other two are for 2-D flow. A transition distance ranging from 10 to 15 times
    of tidal propagation length along the shoreline can be estimated based on the solution. This distance can
    be used to judge whether the interaction among tides is significant. The influences of hydraulic properties
    on the tidal fluctuations within the aquifer can therefore be assessed quantitatively. Based on sensitivity
    analyses, one can conclude that the tidal head is most sensitive to the transmissivity and storativity of the
    aquifer, and least to the damping coefficient of tidal amplitude and wave number along the estuary. The
    sensitivities of head fluctuation to the changes of transmissivity and storativity depend on the shoreline
    length and whether the interaction among waves is significant. On the other hand, the sensitivities of
    head fluctuation to the changes of damping coefficient and wave number increase with diagonal distance
    from the entry of estuary and reach the largest magnitude near the estuary far away seashore.
    Relation: Journal of Hydrology 530, pp.291–305
    DOI: 10.1016/j.jhydrol.2015.09.032
    Appears in Collections:[水資源及環境工程學系暨研究所] 期刊論文

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