Statistical characteristics and transport law of sand waves in the Yangtze Estuary

Guo Xingjie; Cheng Heqin; Mo Ruoyu; Yang Zhongyong

doi:10.3969/j.issn.0253-4193.2015.05.014

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Guo Xingjie, Cheng Heqin, Mo Ruoyu, Yang Zhongyong. Statistical characteristics and transport law of sand waves in the Yangtze Estuary[J]. Haiyang Xuebao, 2015, 37(5): 148-158. doi: 10.3969/j.issn.0253-4193.2015.05.014

Citation:

Guo Xingjie, Cheng Heqin, Mo Ruoyu, Yang Zhongyong. Statistical characteristics and transport law of sand waves in the Yangtze Estuary[J]. Haiyang Xuebao, 2015, 37(5): 148-158. doi: 10.3969/j.issn.0253-4193.2015.05.014

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Statistical characteristics and transport law of sand waves in the Yangtze Estuary

doi: 10.3969/j.issn.0253-4193.2015.05.014

1.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China;Shanghai Institute of Geological Survey, Shanghai 200072, China
2.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
3.
The Third Haber Engineering Investigation and Design of the Ministry of Communications, Shanghai 200032, China
4.
College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China

Received Date: 2014-05-18
Rev Recd Date: 2014-10-18

Abstract

Abstract

The underwater topography at the South Channel,North Passage,Channel of Hengsha and North Channel of the Yangtze Estuary were surveyed by using multibeam echo-sounding system,wave height,wavelength,inflow angle,the dorsal stream angle and sediment characteristics of sand waves in these areas were calculated statistically,and the net displacement of sand waves in one tidal period was estimated on the basis of data for flow rate,grain sizes of sediments and water depths. The results showed that the sand waves in the Yangtze Estuary were basically large,and there took on a proportional relationship between wavelengths with sediment particle sizes. The symmetry of sand waves is different among all surveyed area in the Yangtze Estuary. The more obvious the ebb flow is,the worse the symmetry of sand wave and the more net displacement is. The symmetry of sand waves can reflect the power of water and net displacement of sand waves.
- sand waves,
- Yangtze Estuary,
- flood,
- ebb,
- displacement

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References(27)

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