Numerical Modelling of Tidal Dynamic and Water Circulation at the Gold Coast Broadwater, Australia

4区地球科学 Q3 Earth and Planetary Sciences

Journal of Coastal Research Pub Date : 2024-03-29 DOI:10.2112/jcr-si50-054.1

H. Mirfenderesk, R. Tomlinson

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引用次数: 20

Abstract

MIRFENDERESK, H. and TOMLINSON, R., 2007. Numerical Modelling of Tidal Dynamic and Water Circulation at the Gold Coast Broadwater, Australia. Journal of Coastal Research, SI 50 (Proceedings of the 9th International Coastal Symposium), 277 – 281. Gold Coast, Australia, ISSN 0749.0208 The development of a vertically averaged numerical model of an estuary in the coastal region of the Pacific Ocean on the east coast of Australia is described. The primary objective of the study is to provide a detailed picture of the tidal characteristics in the study area to enable the simulation of the whole water circulation within the water body. A comprehensive data set is collected as part of this study to understand local dynamics and to calibrate and validate the model. Calibration and validation have been achieved through a comparison of computed tidal harmonics against those derived from harmonic analysis of the measured water level variations. Also a comparison was made between the measured discharges across seven cross sections at critical locations in the study area with the discharge obtained through modelling. Calculations show that tides become mixed, mainly semidiurnal in the estuary. The study shows that for lunar constituents (M2 and S2) dissipation mechanisms are dominant and their amplitudes decrease along the estuary. Solar constituents (O1 and K1) experience an increase in amplitude. However, the net result is a reduction of tidal amplitude, indicating the dominance of dissipation mechanisms.

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澳大利亚黄金海岸宽阔水域潮汐动力和水循环数值模拟

MIRFENDERESK, H. and TOMLINSON, R., 2007.Numerical Modelling of Tidal Dynamic and Water Circulation at the Gold Coast Broadwater, Australia.Journal of Coastal Research, SI 50 (Proceedings of the 9th International Coastal Symposium), 277 - 281.澳大利亚黄金海岸，ISSN 0749.0208 描述了澳大利亚东海岸太平洋沿岸地区河口垂直平均数值模式的发展情况。研究的主要目的是提供研究区域潮汐特征的详细情况，以便模拟水体内部的整个水循环。作为这项研究的一部分，收集了一套全面的数据，以了解当地的动态变化，并对模型进行校准和验证。校准和验证是通过将计算出的潮汐谐波与测量水位变化谐波分析得出的潮汐谐波进行比较来实现的。此外，还将研究区域关键位置七个横截面的实测排水量与通过建模获得的排水量进行了比较。计算结果表明，河口的潮汐变得混杂，主要是半日潮。研究表明，月球成分（M2 和 S2）的消散机制占主导地位，其振幅沿河口逐渐减小。太阳成分（O1 和 K1）的振幅有所增大。然而，最终结果是潮汐振幅减小，表明耗散机制占主导地位。

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来源期刊

Journal of Coastal Research 地学-地球科学综合

自引率

0.00%

发文量

审稿时长

3-8 weeks

期刊介绍： The Journal of Coastal Research (JCR) is one of the leading international journals for coastal studies and processes, and is published bi-monthly by the Coastal Education & Research Foundation [CERF]. By covering the entire field of coastal research, the JCR encompasses all subjects relevant to natural and engineered environments (freshwater, brackish, or marine) and the protection/management of their resources in the vicinity of coastlines of the world. Even though the journal broadly focuses on immediate shoreline zones, the JCR also embraces those coastal environments that either reach some indefinite distance inland or that extend seaward beyond the outer margins of the sublittoral (neritic) zone. The JCR disseminates accurate information to both the public and research specialists around the world on all aspects of coastal issues in an effort to maintain or improve the quality of our planet''s shoreline resources.