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Effect of bottom friction on tidal hydrodynamics along Gulf of Khambhat, India

机译：底部摩擦对印度康巴特湾沿岸潮汐水动力的影响

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摘要

Tides play a vital role in coastal hydrodynamics, and it is important to understand their complex characteristics in the coastal areas of creeks, bays, estuaries and gulf. In this study, the spatial variation of heterogeneous friction coefficients and their influence on the variation of different tidal constituents (K1, M2, N2, O1, P1 and S2) along Gulf of Khambhat, west coast of India, were studied. A two-dimensional finite element-based numerical model was developed and zones of different friction coefficients were identified by comparing numerically estimated tidal levels and currents with that of measured and reported by earlier studies. Based on the comparisons, the gulf was divided into five zones of different bottom friction values. The numerical model, assigned with friction coefficients, was used to map the contours of selected tidal constituents. From the results, it was observed that two constituents, M2 and influence the hydrodynamics, significantly. The description of the numerical model, calibration, validation and results are presented in this paper. (C) 2015 Elsevier Ltd. All rights reserved.
机译：潮汐在沿海水动力中起着至关重要的作用，重要的是要了解小溪，海湾，河口和海湾等沿海地区的复杂特征。在这项研究中，研究了印度西海岸坎布哈特湾沿岸非均质摩擦系数的空间变化及其对不同潮汐成分（K1，M2，N2，O1，P1和S2）变化的影响。建立了基于二维有限元的数值模型，并通过将数值估算的潮汐水位和水流与早期研究所测量和报告的数值相比较，确定了不同摩擦系数的区域。根据比较结果，将海湾分为底部摩擦值不同的五个区域。分配有摩擦系数的数值模型用于绘制选定潮汐成分的轮廓。从结果可以看出，两个成分M2和M2显着影响流体动力学。本文介绍了数值模型，校准，验证和结果的描述。 （C）2015 Elsevier Ltd.保留所有权利。

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