空间互相关方法在分析海底沙波迁移规律中的应用

甘雨; 马小川; 阎军

doi:10.3969/j.issn.0253-4193.2019.04.004

空间互相关方法在分析海底沙波迁移规律中的应用

doi: 10.3969/j.issn.0253-4193.2019.04.004

1.
中国科学院海洋研究所海洋地质与环境重点实验室, 山东青岛 266071;中国科学院大学, 北京 100049
2.
中国科学院海洋研究所海洋地质与环境重点实验室, 山东青岛 266071

基金项目: 国家自然科学基金（41406061）。

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出版历程
- 收稿日期: 2018-03-25
- 修回日期: 2018-06-08

The application of spatial cross correlation in analyzing the migration of submarine sand waves

1.
Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;University of Chinese Academy of Sciences, Beijing 100049, China
2.
Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China

摘要

摘要: 海底沙波具有显著的活动性并能够对海底工程设施造成潜在威胁，因此对海底沙波活动性的评估一直以来受到广泛关注。目前大多数研究者仍利用平面剖面对比来分析海底沙波的迁移特征。然而，该方法难以全面高效地获取海底沙波二维平面迁移矢量。本文基于2007年和2009年的高分辨率多波束测深数据，详细阐述了空间互相关方法在分析北部湾东南海域海底沙波迁移规律中的应用过程。利用实测数据进行对比分析，获得了研究区海底沙波的活动特征，并进一步讨论了空间互相关算法中不同参数的选取对结果的影响。结果显示，利用空间互相关分析方法能够有效获取海底沙波二维迁移矢量，获得的海底沙波迁移速率和迁移方向与前人研究成果吻合，表明了该方法的可行性和可靠性。但在对实际DTM数据进行空间互相关分析时，需根据海底沙波形态、数据质量等因素选取合适的参数及矢量获取方法。本研究实验了一种确定海底沙波迁移规律的新方法，该方法将有效提升获得海底地形变化规律的效率和准确度，可获得更加精细的海底地形动力过程。
- 空间互相关 /
- 海底沙波 /
- 迁移规律 /
- 北部湾
Abstract: Submarine sand waves have great activity and may cause potential threatens to underwater facilities, thus the assessment of submarine sand waves always attracts wide attentions. At present, most researchers still use plane and profile contrast to analyze the characteristics of sand wave migration which however cannot produce 2D migration vectors of sand waves efficiently. Basing on high-resolution multi-beam bathymetric data in 2007 and 2009, this study describes the method of using spatial cross correlation to analyze the migration of submarine sand waves in southeastern Beibu Gulf in detail. By contrasting the measured data, the migration characteristics of sand waves in the study area are obtained. And the effects of various crucial parameters on the results in the spatial cross correlation algorithm are also discussed. Results show that spatial cross correlation method is feasible and reliable to produce the 2D migration vector of sand waves. The results are accordant to the previous results of the migration of sand waves in the study area. Nevertheless, when using the spatial cross correlation method, the appropriate parameters and vector acquisition method according to different geometry of sand waves and various data quality are required. This study has practiced a new method to determine the migrations of submarine sand waves, which will improve the efficiency and accuracy of obtaining the migration of marine landforms, as well as the refined dynamics of marine topography.
- spatial cross correlation /
- submarine sand waves /
- migration /
- Beibu Gulf

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