Experiment study on evolution and geometrical characteristics of sandbar profile and berm profile

Zhang Yang; Zou Zhili; Gou Daxun; Luo Nianpeng; Yin Jing

doi:10.3969/j.issn.0253-4193.2015.01.015

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Zhang Yang, Zou Zhili, Gou Daxun, Luo Nianpeng, Yin Jing. Experiment study on evolution and geometrical characteristics of sandbar profile and berm profile[J]. Haiyang Xuebao, 2015, 37(1): 147-157. doi: 10.3969/j.issn.0253-4193.2015.01.015

Citation:

Zhang Yang, Zou Zhili, Gou Daxun, Luo Nianpeng, Yin Jing. Experiment study on evolution and geometrical characteristics of sandbar profile and berm profile[J]. Haiyang Xuebao, 2015, 37(1): 147-157. doi: 10.3969/j.issn.0253-4193.2015.01.015

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Experiment study on evolution and geometrical characteristics of sandbar profile and berm profile

doi: 10.3969/j.issn.0253-4193.2015.01.015

1.
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China
2.
Institute of Marine Environmental Protection, State Oceanic Administration, Dalian 116023, China

Received Date: 2013-11-09
Rev Recd Date: 2014-08-22

Abstract

Abstract

A series of physical model experiments were conducted to study the formation and evolution of sandbar and berm profiles. The characteristics of these profiles were observed.Two initial beach slopes (1:20 and 1:10) and regular and irregular waves with different heights were adopted.The results showed that the sandbar can move onshore or offshore,depending on wave condition (for regular wave cases) or on initial beach slope (for irregular wave cases).But it has a final steady position.The transform of sandbar profile to berm profile was realized with action of a series of waves with gradually decreased wave height. The distribution and formation mechanism of multiple bars formed in the experiment are discussed by relating them to initial beach slope,wave type and spatial distribution of breaking wave. The geometrical features of the sandbar profile are presented.The distribution of the sand grain along beach cross section was measured.The measured equilibrium berm profile agrees with the theoretical result.
- sandbar,
- berm,
- breaking wave,
- beach,
- sand transport

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References(12)

References

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