潮滩微地貌的声学观测与分析

南京大学学报(自然科学版) ›› 2014, Vol. 50 ›› Issue (5): 611–620.

潮滩微地貌的声学观测与分析

陈景东1，汪亚平1*，朱庆光1，黄蓓1，吴自银3，高建华1,2

出版日期:2014-09-11 发布日期:2014-09-11
作者简介: （1．南京大学地理与海洋科学学院，南京,210093；2．海洋沉积与环境地质国家海洋局重点实验室，青岛,266061；
3．国家海洋局第二海洋研究所，杭州,310012）
基金资助:
海洋公益性行业科研专项经费项目（201105001-02,No.201105006）,国家自然科学基金项目（41376044）,海洋沉积物与环境地质国家海洋局重点实验室开放基金(MASEG201205)

Acoustic observations and analysis of microreliefon tidal flats

Chen Jingdong1，Wang Yaping1*，Zhu Qingguang1，Huang Bei1，Wu Ziyin3，Gao Jianhua1,2

Online:2014-09-11 Published:2014-09-11
About author: （1．School of Geographic and Oceanographic Sciences，Nanjing University，Nanjing,210093， China；
2．Key Laboratory of Marine Sedimentology & Environmental Geology，State Oceanic Administration，Qingdao,266061， China；
3．Second Institute of Oceanography，State Oceanic Administration，Hangzhou,310012， China）

摘要/Abstract

摘要： 于2013年6月8日至6月9日在江苏如东潮滩进行海底地貌与沉积动力学观测。采用“差值法”从声呐数据中提取床面形态信息，并分析床面形态演化与水动力、悬沙浓度的关系。床面形态数据结果表明，潮周期内底床形态变化明显；分析同步的沉积动力学观测数据发现，底床形态的起伏程度与流速呈正相关关系。随着流速增加，近底部水体悬沙浓度增加，底床形态起伏程度增加；流速减小，近底部水体悬沙浓度回落，底床形态的起伏程度降低。分别分析东西向与南北向底床剖面起伏程度与流速的关系表明，流向对沙纹的起伏程度具有重要影响，垂直沙纹走向的水流会增大底床形态的起伏程度，平行沙纹走向的水流会减小底床形态的起伏程度。

Abstract: The seabed morphology and hydrological observation were carried out on the Rudong tidal flat in 2013 June 8 and June 9. Utilized “difference method" to extract the bedform information from sonar data, and then analyzed the relationship between bedform evolution and hydrodynamic and suspended sediment concentration.The bedform data show that thechanges in seabed morphology are significant within a single tidal cycle. Analyses of the sedimentary dynamic observation data reveal that there was a positive relationship between the bedform undulations and velocity. As current speed increases, the suspended sediment concentration of water in the near bottom and the bedform undulations increases; when the current speed reduced, the suspended sediment concentration and bedform undulations reduced as well. Respectively analysis the relationship between east-west and south-north bedform undulations degree and the current speed indicated that, the direction of current has important influence on the degree of bedform undulations.The current cross the sand ripple will increase the undulations of bedform and the current along sand ripple will decrease the undulations of bedform.

陈景东1，汪亚平1*，朱庆光1，黄蓓1，吴自银3，高建华1,2. 潮滩微地貌的声学观测与分析[J]. 南京大学学报(自然科学版), 2014, 50(5): 611–620.

Chen Jingdong1，Wang Yaping1*，Zhu Qingguang1，Huang Bei1，Wu Ziyin3，Gao Jianhua1,2. Acoustic observations and analysis of microreliefon tidal flats[J]. Journal of Nanjing University(Natural Sciences), 2014, 50(5): 611–620.

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