Distribution characteristics of waves in Sanmen Bay based on field observation

Zhou, Yarui; Li, Zhong‐Ming; Pan, Yun; Bai, Xinglan; Wei, Dongze

doi:10.1016/j.oceaneng.2021.108999

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…The diameter of fishing net is 0.003 m, and mesh bar is 0.32 m. The diameter of the main mooring rope is 0.02 m, and the diameter of the auxiliary mooring is 0.01 m. In Figure 3, the distance between the middle node of mooring rope and the bottom center of floating frame is 1 m. Other physical parameters and calculated parameters are the same as those in Table 2. According to the statistical wave properties of 5% cumulative frequency in Zhoushan sea area in China [22], the wave height is 3 m and the water depth is 12 m. The wave steepness is 1/20, and the wave period calculated according to the dispersion equation is 6.7 s, which is close to the wave period 6 s of 5% cumulative frequency as calculated in literature [22].…”

Section: Resultssupporting

confidence: 72%

Numerical Simulation Study on Environment-Friendly Floating Reef in Offshore Ecological Belt under Wave Action

Pan

Tong

Zhou

et al. 2021

Water

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An artificial floating reef is an important part of the coastal ecological corridor. The large-scale construction of floating reefs by optimizing mooring methods can effectively improve the ecological effects of coastal projects. The artificial floating reef belongs to coastal engineering, and wave resistance is fundamental to its structural design. In this paper, the method for processing coupling forces and motion, the method for judging the floating reef out of water surface, and the method for correcting velocity and acceleration of water mass points are elaborated in detail by using the finite element method and lumped-mass mooring model. By comparing and analyzing the results of physical experiment and numerical simulation, the correctness of the numerical model is verified. Finally, the diachronic variation of pitching angle of floating reef, the tension of the mooring rope, and the total tension of the fixed points of the fishing net were analyzed by the dynamic response numerical mode with a new type of mooring. The purpose of the current study was to provide a basis for the optimization of structure shape, the matching of floating body, and the counterweight of artificial floating reef.

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Section: Resultssupporting

confidence: 72%

Numerical Simulation Study on Environment-Friendly Floating Reef in Offshore Ecological Belt under Wave Action

Pan

Tong

Zhou

et al. 2021

Water

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“…Zhou et al [28] pointed out that the typhoon Talim (from 20:00 on 9 September to 14:00 on 18 September 2017) approached the Sanmen Bay in the southeast of the East China Sea and then turned to land in Japan as shown in Figure 1. During the action time, it had remarkable influences on the waves in Sanmen Bay Sea area.…”

Section: Data Collection and Processing Methodsmentioning

confidence: 99%

“…Therefore, this paper selects the typhoon wave spectrum at the time of the maximum wave height (at 11 o'clock on 14 September 2017) as a representative to study the three-dimensional numerical simulation of Typhoon wave characteristics. The water depth is around 7.5 m (geographic position: 29 • 01.003 N, 121 • 42.893 E), and the wave monitoring point in the SE direction is open to the sea area facing the East China Sea, and there is basically no any islands in this sea area [28], exhibiting a relatively wide waters from the NW direction to the SE direction, and waves observed in multiple directions are well representative. The Storm software provided with the instrument calculates the wave spectrum through the fast Fourier transformation (FFT) method, which are smoothed within the frequency domain with 6 degrees of freedom with a cut-off frequency of 1 Hz and a resolution of 0.01 Hz.…”

Section: Data Collection and Processing Methodsmentioning

confidence: 99%

A Computation Method for the Typhoon Waves Using the Field Wave Spectrum

et al. 2022

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Wave features and propagation characteristics during typhoons are the key factors to study the dynamic response of ocean engineering and coastal disaster prevention and mitigation under extreme climate. Based on the Longuet-Higgins theory, the method of the field spectrum during the typhoon was used to compute the typhoon waves. And the directional spectrum, the formulas of wave surface, the velocity of water particles, and the acceleration of water particles were investigated. The results showed that the interpolated field wave spectrum combined with the SWOP direction spectrum could accurately simulate the three-dimensional typhoon waves. The significant wave height and the average period of the simulated wave surface at fixed point were statistically evaluated by the upward zero-crossing method, and the relative errors were ± 5% and ± 15%, respectively. The typhoon wave surface computed by a dual peak spectrum had small periodic waves, and the velocity and acceleration of water particles differed considerably from the JONSWAP spectrum. Finally, a fastened slender cylinder was simulated under action of the typhoon waves, which proved the applicability of the computation method. This study aims at providing a basis for the simulation of the dynamic response of marine structures under the typhoon waves action.

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“…Therefore, green development should be pursued as we build the Ningbo-Taizhou-Wenzhou port industrial belt, economically and socially (Jiao, 2001). As a large semienclosed Bay dotted with various islets and abundant in aquatic products, mudflats, the tide, and ports (Zhou et al, 2021;Yu et al, 2022) in Zhejiang Province, Sanmen Bay enjoys enormous potential to grow the bay area economy since it connects Hangzhou Bay to the Wenzhou-Taizhou Economic Corridor. Nonetheless, its self-purification capacity is weak, and the environment is fragile due to its semi-enclosed landform.…”

Section: Related Workmentioning

confidence: 99%

Assessment of Ecological Sustainability for International Bays in the Context of Common Prosperity—A Case Study of Sanmen Bay in Zhejiang Province

Liu

Zhang²,

Chen³

et al. 2022

Front. Environ. Sci.

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In this paper, the spatial distribution maps of Sanmen Bay’s landscape genres between 1995 and 2020 were drawn based on spectra, GPS data, and the genres’ information extracted through remote-sensing imagery, in a way to fundamentally evaluate the region’s coupling and coordinated development. Moreover, to provide a science-based reference point for protecting and utilizing the Bay’s wetlands, changes of landscape genres were examined through a transition matrix, and the drivers of these dynamics were analyzed on a Logistic regression model. In addition, a theoretical and appraisal system compatible with the comprehensive evaluation of a bay’s ecosystem was built upon the analysis of Sanmen Bay’s land and sea areas. This would provide a scientific basis for bay ecosystem preservation by complementing the theoretical architecture of comprehensively evaluating a bay’s environment and keeping the evaluation more timely and complete. Beyond that, we investigated the region’s social development and its spatial improvement over the marine economy from the perspective of a bay’s coupled society-economy-ecology system, which took into account manifest and latent environmental factors that have been absent in conventional bay development planning. Finally, through empirical analysis, to improve the social and economic landscape of Sanmen Bay provides effective policy recommendations, the study also made new efforts to explore and promote the sustainability of China’s Gulf ecosystem.

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Distribution characteristics of waves in Sanmen Bay based on field observation

Cited by 5 publications

References 14 publications

Numerical Simulation Study on Environment-Friendly Floating Reef in Offshore Ecological Belt under Wave Action

Numerical Simulation Study on Environment-Friendly Floating Reef in Offshore Ecological Belt under Wave Action

A Computation Method for the Typhoon Waves Using the Field Wave Spectrum

Assessment of Ecological Sustainability for International Bays in the Context of Common Prosperity—A Case Study of Sanmen Bay in Zhejiang Province

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