桑沟湾筏式海带养殖对潮流垂直结构的影响

doi:10.3969/j.issn.1001-909X.2016.04.003

海洋学研究 ›› 2016, Vol. 34 ›› Issue (4): 20-27.DOI: 10.3969/j.issn.1001-909X.2016.04.003

桑沟湾筏式海带养殖对潮流垂直结构的影响

何宇晴^1,2, 黄大吉^*1,2,3, 曾定勇^1,2, 乔旭东⁴

1.卫星海洋环境动力学国家重点实验室,浙江杭州 310012;
2.国家海洋局第二海洋研究所,浙江杭州 310012;
3.浙江大学海洋学院,浙江舟山316021;
4.浙江工商大学环境科学与工程学院,浙江杭州 310018

收稿日期:2016-05-17 修回日期:2016-06-17 出版日期:2016-12-15 发布日期:2022-11-24
通讯作者: * 黄大吉(1962-),男,研究员,主要从事海洋动力过程和海洋生态系统动力学方面的研究。E-mail:djhuang@sio.org.cn
作者简介:何宇晴(1991-),女,江苏张家港市人,主要从事海洋动力过程方面的研究。E-mail:heeyuqing1991@163.com
基金资助:
国家重点基础研究发展计划项目资助(2011CB409803)

Effect of suspended kelp culture on vertical structure of tidal current in Sanggou Bay, China

HE Yu-qing^1,2, HUANG Da-ji^*1,2,3, ZENG Ding-yong^1,2, QIAO Xu-dong⁴

1. State Key Laboratory of Satellite Ocean Environment Dynamics, Hangzhou 310012, China;
2. Second Institute of Oceanography, SOA, Hangzhou 310012, China;
3. Ocean College, Zhejiang University, Zhoushan 316021, China;
4. School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China

Received:2016-05-17 Revised:2016-06-17 Online:2016-12-15 Published:2022-11-24

摘要/Abstract

摘要： 利用桑沟湾海带播苗前和成熟期的海流剖面资料,对最显著的M₂分潮流椭圆四要素(最大流速、椭圆率、最大流速方向和最大流速出现时间)的垂直分布特征进行对比分析,结果表明筏式海带养殖对潮流垂直结构有显著影响,由海带播苗前的单一海底边界层,变为海带成熟期的海表和海底双重边界层。海带播苗前,M₂分潮流椭圆要素在垂向上变化不大;而在海带成熟期,从中层向海面和海底,最大流速迅速减小、椭圆率逐渐增大、最大流速方向左偏、最大流速出现时间提前。湾口中部的最大流速方向从海带播苗前的南北方向转为海带成熟期的西北—东南方向,这是由水位梯度的变化造成的。

关键词: 桑沟湾, 筏式海带养殖, 潮流垂直结构, M₂分潮

Abstract: The vertical distribution of tidal ellipse parameters (amplitude of the major axis, ellipticity, direction and phase) of the dominant M₂ tidal current in Sanggou Bay are analyzed based on in-situ observed current profile data during kelp-free and kelp-mature periods. The results indicate that the suspended kelp culture has a remarkable effect on vertical structure of tidal current. The parameters of M₂ tidal ellipse vary little in the vertical direction during kelp-free period. In contrast, due to the impact of the suspended kelp, the M₂ tidal ellipse parameters show a significant vertical variation during kelp-mature period. Specifically, moving away from the middle layer towards both surface and bottom boundary layers, the maximum velocity decreases rapidly, the ellipticity increases, the direction of the maximum velocity veers clockwise and the appearing time of maximum velocity becomes earlier. The observed data also indicate that at the middle entrance of Sanggou Bay, the direction of the maximum velocity turns from the north-south direction during the kelp-free period to the northwest-southeast direction during the kelp mature period, which was found to be caused by the relevant change of sea level gradient.

Key words: Sanggou Bay, suspended kelp culture, vertical tidal current structure, M₂ tidal current

中图分类号:

P731.2

何宇晴, 黄大吉, 曾定勇, 乔旭东. 桑沟湾筏式海带养殖对潮流垂直结构的影响[J]. 海洋学研究, 2016, 34(4): 20-27.

HE Yu-qing, HUANG Da-ji, ZENG Ding-yong, QIAO Xu-dong. Effect of suspended kelp culture on vertical structure of tidal current in Sanggou Bay, China[J]. Journal of Marine Sciences, 2016, 34(4): 20-27.

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桑沟湾筏式海带养殖对潮流垂直结构的影响

Effect of suspended kelp culture on vertical structure of tidal current in Sanggou Bay, China

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