Propagation and damping of tidal energy in the Pearl River Delta

Ou Suying; Tian Feng; Guo Xiaojuan; Yang Hao

doi:10.3969/j.issn.0253-4193.2016.12.001

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Ou Suying, Tian Feng, Guo Xiaojuan, Yang Hao. Propagation and damping of tidal energy in the Pearl River Delta[J]. Haiyang Xuebao, 2016, 38(12): 1-10. doi: 10.3969/j.issn.0253-4193.2016.12.001

Citation:

Ou Suying, Tian Feng, Guo Xiaojuan, Yang Hao. Propagation and damping of tidal energy in the Pearl River Delta[J]. Haiyang Xuebao, 2016, 38(12): 1-10. doi: 10.3969/j.issn.0253-4193.2016.12.001

Ou Suying, Tian Feng, Guo Xiaojuan, Yang Hao. Propagation and damping of tidal energy in the Pearl River Delta[J]. Haiyang Xuebao, 2016, 38(12): 1-10. doi: 10.3969/j.issn.0253-4193.2016.12.001

Citation:

Ou Suying, Tian Feng, Guo Xiaojuan, Yang Hao. Propagation and damping of tidal energy in the Pearl River Delta[J]. Haiyang Xuebao, 2016, 38(12): 1-10. doi: 10.3969/j.issn.0253-4193.2016.12.001

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Propagation and damping of tidal energy in the Pearl River Delta

doi: 10.3969/j.issn.0253-4193.2016.12.001

Institute of Estuarine and Coastal Research, School of Marine Sciences, Sun Yat-sen University, Guangzhou 510275, China;State and Local Joint Engineering Laboratory of Estuarine Hydraulic Technology, Guangzhou 510275, China

Received Date: 2016-03-25

Abstract

Abstract

Due to the interaction of runoff and tide, the energy flux of delta's channels contains the runoff energy and the tidal energy. Based on the data of water level and flow measurement in the Pearl River Delta, an interaction model between the runoff and the tide was established to calculate the M₂, K₁ tidal energy and the tidal energy of high tidal frequency without the signal of river flow. The results showed that about 51.2% of the tidal energy through the Humen into delta, and the tidal energy through Yamen, Jiaomen, Modaomen accounted for about 37%. For the friction effect of topographical and runoff, 148.33 MW energy in the delta is loss. Tidal energy propagated as the convergent type or divergent type along the delta and damped. The unit kinetic energy along the path decay quicker than the tidal potential energy, and semidiurnal tidal energy can decay greater than that of diurnal tide, which is more significant in the upper delta. For the influence of the morphology of Humen-Shiziyang outlet, the attenuation of M₂ tidal amplitude (or energy) is the smallest, even the M₂ tidal energy increase approximately 0.77% from Humen to Sishengwei. In the two channels system including Humen-Shiziyang outlet and Yamen outlet to Shizui of Tanjiang, the total tidal energy attenuation is greater than the attenuation of unit tidal energy for the tide energy diverge into different branches. But the total tidal energy attenuation is greater than the attenuation of unit tidal energy in the west river delta for the tide energy from Modaom, Jitimen, Hutiaomen and Yamen converge. The tides from Hengmen, Hongqimen and Jiaomen converged and diverged in the middle delta, and the total kinetic energy, M₂ tidal energy, K₁ tidal energy is less than the tidal potential energy. The tidal potential energy of high frequency including D₃ and D₄ constituents has increased along the channel.
- the Pearl River Delta,
- tidal energy,
- runoff,
- river-tide model,
- damping

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References(13)

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