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Fourier decomposition of multi-scale sand wave fields on the Taiwan Banks
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Chao Zhu1, 2, 3, 4, Ziyin Wu2, 3, 4, 5, *, Jieqiong Zhou2, 3, 5, Fanlin Yang1, Dineng Zhao2, 3, Yang Liu2, 3, Haohao Lu2, 3, 6
Haiyang Xuebao | 2019, 41(9) : 136 - 144
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Haiyang Xuebao | 2019, 41(9): 136-144
• Marine Geology •
Fourier decomposition of multi-scale sand wave fields on the Taiwan Banks
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Chao Zhu1, 2, 3, 4, Ziyin Wu2, 3, 4, 5, *, Jieqiong Zhou2, 3, 5, Fanlin Yang1, Dineng Zhao2, 3, Yang Liu2, 3, Haohao Lu2, 3, 6
Affiliations
  • 1 College of Geomrtics, Shandong University of Science and Technology, Qingdao 266590, China
  • 2 Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
  • 3 Key Laboratory of the Submarine Geosciences, State Oceanic Administration, Hangzhou 310012, China
  • 4 Ocean College, Zhejiang University, Zhoushan 316021, China
  • 5 School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
  • 6 School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China
Published: 2019-09-25 doi: 10.3969/j.issn.0253-4193.2019.09.013
Outline
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Sand waves are widely distributed in the world and have complex genesis. And multi-scale complex sand waves often overlap to form a complex sand wave geomorphology system, which makes it difficult to conduct quantitative research. To solve this problem, a practical Fourier analysis method is proposed in this paper, and Butterworth filter is designed to transform water depth data into frequency domain, and then decompose complex sand wave geomorphology into a series of single types of sand waves in different frequencies. Taking the complex sand wave geomorphology system of Taiwan Banks as an example, three spatial scales of sand waves are quantitatively decomposed, which are: giant sand waves (over 100 m in length, over 5 m in height), medium sand waves (wavelength of 5–100 m, wave height of 0.4–5 m) and sand ripples (wavelength less than 5 m, wave height less than 0.4 m). The quantitative analysis method of sand waves proposed in this paper is helpful to study the genesis and mechanism of sand waves in different scales, and is also of practical value to the safety assessment of marine engineering in sand wave fields.

submarine sand waves  /  Fourier analysis  /  multi-scale decomposition  /  Taiwan Banks  /  multi-beam echo sounding
Chao Zhu, Ziyin Wu, Jieqiong Zhou, Fanlin Yang, Dineng Zhao, Yang Liu, Haohao Lu. Fourier decomposition of multi-scale sand wave fields on the Taiwan Banks[J]. Haiyang Xuebao, 2019 , 41 (9) : 136 -144 . DOI: 10.3969/j.issn.0253-4193.2019.09.013
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Article Info
doi: 10.3969/j.issn.0253-4193.2019.09.013
  • Receive Date：2018-10-29
  • Online Date：2026-04-03
  • Published：2019-09-25
Article Data
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History
  • Received：2018-10-29
  • Revised：2019-03-18
Funding
Affiliations
    1 College of Geomrtics, Shandong University of Science and Technology, Qingdao 266590, China
    2 Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
    3 Key Laboratory of the Submarine Geosciences, State Oceanic Administration, Hangzhou 310012, China
    4 Ocean College, Zhejiang University, Zhoushan 316021, China
    5 School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
    6 School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China
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https://castjournals.cast.org.cn/joweb/hyxb/EN/10.3969/j.issn.0253-4193.2019.09.013
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表12种不同金属材料的力学参数
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Family		 属数
Number of
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Number of
species		 占总种数比例
Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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