不同周期分潮簇对复杂河网潮位分布的影响*

doi:10.11978/2018044

Journal of Tropical Oceanography ›› 2019, Vol. 38 ›› Issue (1): 27-34.doi: 10.11978/2018044CSTR: 32234.14.2018044

• Orginal Article • Previous Articles Next Articles

Relationship of tidal level and different tidal species in complex river networks

Lizhen QIN^1,²(), Wei ZHANG^1,²(), Mingkai GUAN³, Sheng ZHAO⁴, Liangqiu CHENG⁵

1. Key Laboratory of Coastal Disaster and Defence (Hohai University), Ministry of Education, Nanjing 210098, China
2. College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China
3. Shanghai Investigation Design & Research Institute Co., Ltd. Fujian Branch, Fuzhou 350001, China;
4. Department of Civil Engineering, Southeast University, Nanjing 211189, China
5. Guiyang Investigation and Design Institute of Power Construction Corporation of China, Guiyang 550081, China;

Received:2018-04-18 Revised:2018-06-29 Online:2019-01-16 Published:2019-01-16
Supported by:
National Key Research Program of China (2017YFC0405900);National Natural Science Foundation of China (41676078)

Abstract

Abstract:

The surface level variation greatly depends on semidiurnal and diurnal tidal species in the estuaries of irregularly semidiurnal tides. However, fortnightly tidal species have a great impact on the mean water surface topography upriver due to substantial difference in damping of the main different tidal species. Therefore, the effect of different tidal species on tidal level distribution has obviously regional characteristics when tides propagate into deltaic river networks. In this paper, a one-dimensional flow model of the Pearl River networks was used to obtain a series of high-frequency and long-period tidal levels. Then, spatial distributions of the four main tidal species in the study area were obtained for further study by continuous wavelet transformation (CWT) and reconstruction. Finally, a new pixel affinity for spectral image segmentation was employed to compare the similarity between two figures, which implied a spatial correlation of tidal species and tidal level distribution in the complex river network. The results showed that surface level variation is influenced by semi-diurnal and diurnal tidal species near the outlets, while mean water surface topography is influenced by fortnightly tidal species in the complex river network.

Key words: amplitude of tidal species, continuous wavelet transport, complex river network, a one-dimensional flow model of river network, the Pearl River delta

Lizhen QIN, Wei ZHANG, Mingkai GUAN, Sheng ZHAO, Liangqiu CHENG. Relationship of tidal level and different tidal species in complex river networks[J].Journal of Tropical Oceanography, 2019, 38(1): 27-34.

Figures/Tables 7

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References 17

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分潮簇	分潮种类	周期	频率/cph
全日分潮簇(D₁)	Q₁	26.87太阳时	0.0372
	O₁	25.82太阳时	0.0387
	P₁	24.07太阳时	0.0415
	K₁	23.93太阳时	0.0418
半日分潮簇(D₂)	N₂	12.66太阳时	0.0790
	M₂	12.42太阳时	0.0805
	S₂	12.00太阳时	0.0833
	K₂	11.97太阳时	0.0835
四分之一日分潮簇(D₄)	MN₄	6.27太阳时	0.1595
	M₄	6.21太阳时	0.1610
	MS₄	6.10太阳时	0.1639
半月分潮簇(D_1/14)	MSf	14.77太阳日	0.0028

分潮簇	频率范围
D₄	2^-3~2^-1.5
D₂	2^-1.5~2^-0.5
D₁	2^-0.5~2^0.5
D_1/14	2^3.4~2^4.5

Relationship of tidal level and different tidal species in complex river networks

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