Short-term morphological changes after sand-digging during a sand sculpture activity
Abstract The morphology of the beach backshore and foreshore at Huiquan Bay, Qingdao, China, is characterized by a single intertidal sandbar system with a spring tide range of 4.59 m. The beach was measured with a laser total station of Leica TPS402. Contours of the beach were generated using data c...
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Published in | Chinese journal of oceanology and limnology Vol. 27; no. 4; pp. 966 - 974 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
Heidelberg
SP Science Press
01.11.2009
Springer Nature B.V Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China |
Subjects | |
Online Access | Get full text |
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Summary: | Abstract The morphology of the beach backshore and foreshore at Huiquan Bay, Qingdao, China, is characterized by a single intertidal sandbar system with a spring tide range of 4.59 m. The beach was measured with a laser total station of Leica TPS402. Contours of the beach were generated using data collected in March and November 2005. The survey method provided 2 mm measuring accuracy and 4-10 m horizontal spacing. The net accretion volume of the foreshore was about 11,215 m3 from March to November. After sand sculpture activity, the axis of the sand trough migrated onshore from about 3.5 m to 17.5 m on the foreshore beach in November. At the same time, the axis of the sandbar crest migrated onshore no more than 42.25 m on the northwest foreshore; and it migrated offshore no more than 23.75 m on the southeast foreshore. On the northwest and southeast foreshore beach, two strips of erosion areas with a thickness of 0~).2 m appeared on the sandbar crest. Accretion occurred at the bottom of the sand trough with a thickness of-0.2-0.6 m. The sandbar height decreased after sand sculpture activity, and it was no more than 0.7 m in March and 0.6 m in November. Human activities, such as sand digging on the sandbar crest during sand sculpture activity, also can disturb the beach morphology of intertidal bar systems. This phenomenon also was validated by comparison of beach morphology, the results of a color artificial tracer experiment and a sediment transportation trend prediction. |
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Bibliography: | sand trough sandbar beach profile 37-1150/P S225.72 TU528.04 sand trough; sandbar; beach profile; beach morphology beach morphology |
ISSN: | 0254-4059 2096-5508 1993-5005 2523-3521 |
DOI: | 10.1007/s00343-009-9243-7 |