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Spatio-Temporal Characteristics of Waves in Hangzhou Bay Based on ERA5 Wind Field
On the basis of 30-year observed ERA5 wind field analysis data, the wave changes around Hangzhou Bay are generated based on SWAN model. The wave rose diagrams of different locations in Hangzhou Bay have been drawn, the seasonal and interannual variation characteristics of wave height are analyzed. Several results are followed. (1) The direction of dominate wave located in the Hangzhou Bay head are NE and ENE, whereas the strongest wave direction is NE; Meanwhile, in the middle of Bay, the dominate wave direction, which on the northern side are E and ESE, in middle are ENE and E, and on the southern side are NE and ENE. The strongest wave direction from north to south are ESE, E and ENE respectively. In the inlet, the dominate wave direction, which on the northern side are ENE and E, in middle are NE and ENE, and on the southern side is NNE. The strongest wave direction from north to south are ESE, E and NE respectively. (2) The trend of mean significant wave height distribution is consistent all year round. It is diffused from the inlet to the top of Hangzhou Bay. The inlet is larger than the top, and the middle is larger than both sides. The quarterly average significant wave height varies from 0.36 to 0.40 m, while the mean value in autumn is slightly higher than those in other seasons. (3) In Hangzhou Bay, there is no vertical difference on annual mean wind speed of the latest 30 years, and the general trend is relatively stable. The variation tendency of annual mean significant wave height is consistent with that of annual mean wind speed. Also it is found that the correlation between them is good with the correlation coefficient of 0.77.
Spatio-Temporal Characteristics of Waves in Hangzhou Bay Based on ERA5 Wind Field
On the basis of 30-year observed ERA5 wind field analysis data, the wave changes around Hangzhou Bay are generated based on SWAN model. The wave rose diagrams of different locations in Hangzhou Bay have been drawn, the seasonal and interannual variation characteristics of wave height are analyzed. Several results are followed. (1) The direction of dominate wave located in the Hangzhou Bay head are NE and ENE, whereas the strongest wave direction is NE; Meanwhile, in the middle of Bay, the dominate wave direction, which on the northern side are E and ESE, in middle are ENE and E, and on the southern side are NE and ENE. The strongest wave direction from north to south are ESE, E and ENE respectively. In the inlet, the dominate wave direction, which on the northern side are ENE and E, in middle are NE and ENE, and on the southern side is NNE. The strongest wave direction from north to south are ESE, E and NE respectively. (2) The trend of mean significant wave height distribution is consistent all year round. It is diffused from the inlet to the top of Hangzhou Bay. The inlet is larger than the top, and the middle is larger than both sides. The quarterly average significant wave height varies from 0.36 to 0.40 m, while the mean value in autumn is slightly higher than those in other seasons. (3) In Hangzhou Bay, there is no vertical difference on annual mean wind speed of the latest 30 years, and the general trend is relatively stable. The variation tendency of annual mean significant wave height is consistent with that of annual mean wind speed. Also it is found that the correlation between them is good with the correlation coefficient of 0.77.
Spatio-Temporal Characteristics of Waves in Hangzhou Bay Based on ERA5 Wind Field
Lecture Notes in Civil Engineering
Wang, Weiqiang (editor) / Wang, Chengzhi (editor) / Lu, Yang (editor) / Zheng, Guodan (author) / Chen, Taoxiao (author) / Shi, Yuan (author) / Liu, Ye (author) / Yang, Yuanping (author)
2024-11-08
15 pages
Article/Chapter (Book)
Electronic Resource
English
Ensemble Machine Learning greatly improves ERA5 skills for wind energy applications
| DOAJ | 2023