IOCAS-IR  > 海洋地质与环境重点实验室
Effects of suspended culture of the seaweed Laminaria japonica aresch on the flow structure and sedimentation processes
Zhang Zehua1,2; Huang Haijun1; Liu Yanxia1; Yan Liwen1; Bi Haibo1
2016-08-01
Source PublicationJOURNAL OF OCEAN UNIVERSITY OF CHINA
Volume15Issue:4Pages:643-654
SubtypeArticle
AbstractThe culture of suspended kelp, such as Laminaria japonica Aresch, has arisen in nearshore areas for approximately 30 years since the 1980s. This long-term activity has significant impact on the regional hydrodynamic and sedimentary environments. In this study the impact was investigated, based on synchronized multi-station data from continuous observations made within and around the culture area. In total, three current velocity profiles were identified inside and on the landward side of the culture area. Based on the current velocity profiles we calculated the boundary layer parameters, the fluxes of erosion/deposition, and the rate of sediment transport in different times at each observation site. Comparison between culture and non-culture periods showed that the presence of suspended kelp caused the reduction in the average flow velocity by approximately 49.5%, the bottom friction velocity by 24.8%, the seabed roughness length by 62.7%, and the shear stress and the flux of resuspended sediment by approximately 50%. From analyses in combination with the corresponding vertical variation of the suspended sediment distribution, it is revealed that the lifted sediments by resuspension is mixed with the upper suspended material, which will modify the regional distribution of suspended sediment. These changes in flow structure and sediment movement will accelerate seabed siltation, which corresponds to the changes in seabed erosion/deposition. However, under the influences of the seasonal changes in kelp growth the magnitude of change with the seabed siltation was not obvious inside the culture area, but a fundamental change was apparent around the culture area.
KeywordKelps Suspended Culture Velocity Profiles Sedimentation Processes Heini Bay
DOI10.1007/s11802-016-2994-9
Indexed BySCI
Language英语
WOS IDWOS:000379536300010
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/130951
Collection海洋地质与环境重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang Zehua,Huang Haijun,Liu Yanxia,et al. Effects of suspended culture of the seaweed Laminaria japonica aresch on the flow structure and sedimentation processes[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2016,15(4):643-654.
APA Zhang Zehua,Huang Haijun,Liu Yanxia,Yan Liwen,&Bi Haibo.(2016).Effects of suspended culture of the seaweed Laminaria japonica aresch on the flow structure and sedimentation processes.JOURNAL OF OCEAN UNIVERSITY OF CHINA,15(4),643-654.
MLA Zhang Zehua,et al."Effects of suspended culture of the seaweed Laminaria japonica aresch on the flow structure and sedimentation processes".JOURNAL OF OCEAN UNIVERSITY OF CHINA 15.4(2016):643-654.
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