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| 莱州湾东部沙波地貌分布特征及其形成演化 |
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李近元1,2,3,4, 范奉鑫1,4, 徐 涛1,4, 栾振东1,4, 张捷扬1,4
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1.中国科学院海洋研究所;2.中国科学院研究生院;3.中能电力科技开发有限公司;4.中国科学院海洋地质与环境重点实验室
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| 摘要: |
| 由2009 年海底地形地貌调查资料, 对莱州湾东部海底沙波的分布和形成进行探讨研究。结果发现: 该地区发育大面积海底沙波地形, 沙波主要为二维直线型沙波, 陡峭度为0.001, 对称指数为1.2,对称指数较好。沙波的形成和海底坡度以及水深有密切关系, 在平坦海底易于形成, 且与水深有一定的负相关关系。莱州湾东部沙波是10 m 等深线的古海岸线上形成的滨海堆积体。研究结果对莱州湾东部沙波的形成演化研究具有重要意义。 |
| 关键词: 莱州湾 沙波 分布特征 形成演化 |
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| 基金项目:中国科学院知识创新工程重要方向项目(KZCX2-YW-212-2) |
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| The distribution characteristics and evolution of the sand wave in the east of Laizhou Bay |
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| Abstract: |
| The seabed topography survey data of Layzhou Bay were collected with multibeam sounder and echo-sounder in March, 2009. Based on the bathymetric data, the distribution characteristics and the evolution of the sand waves in the area were studied. There were mainly two-dimensional linear sand wave in the study area, the wavelength of sand wave ranging from 50 m to 350 m, wave height from 0.05 m to 0.4 m, steepness from 0.0007 to 0.006, and symmetry from 0.7 to 2.3. The sand wave distribution was not only related to the gradient of the seabed, but also was negatively related to the seabed depth. Laizhou Bay’s sand wave formed near the isobath 10 m of the seabed, where is the ancient shorelines littoral deposit. |
| Key words: Laizhou Bay sand wave distribution charateristics evolution |