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Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China
Yu Jianqing1,2,3; Jiang Jingbo1; Gong Dejun1; Li Siren1; Xu Yongping1
2011-05-01
Source PublicationCHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
Volume29Issue:3Pages:691-701
SubtypeArticle
AbstractModeling sediment transport depends on several parameters, such as suspended sediment concentration (SSC), shear stress, and settling velocity. To assess the ability of Pulse-Coherent Acoustic Doppler Profiling (PC-ADP) to non-intrusively quantify spatial and temporal SSC and settling velocity at seabed, a field experiment was conducted in the Beibu Gulf (Tonkin Gulf), in the South China Sea. The spatial profiles and temporal variations in SSC at 1 m above bottom were derived from PC-ADP acoustic backscatter intensity determinations after being calibrated with the optical backscatter sensor (OBS) measurements at the same elevation. The PC-ADP and OBS results agreed well. The temporal settling velocity obtained from Rouse profiles agreed well with the Soulsby formula based on size information by LISST (laser in situ scattering and transmissometry). Tides and tidal currents are diurnal in the gulf. SSC increased with increasing ebb and flood flow, and it rapidly decreased with the increase of distance from the seabed. The maximum SSC at 0.16 m and 1.3 m above bottom reached 816 mg/L and 490 mg/L during spring tides, respectively. The sediments consisted of mineral particles 23-162 mu m in diameter and 0.05-2.04 cm/s in settling velocity. Generally, both the SSC and settling velocity followed variations in the bottom friction. Results suggest that PC-ADP is able to provide reasonable SSC and settling velocity measurements of both profiles and time series for a long study period.
KeywordSuspended Sediment Settling Velocity Shear Velocity Acoustic Backscatter Tidal Currents Beibu Gulf
DOI10.1007/s00343-011-0164-x
Indexed BySCI
Language英语
WOS IDWOS:000292558100025
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/32928
Collection海洋环境工程技术研究发展中心
Affiliation1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Natl Ctr Ocean Stand & Metrol, Tianjin 300112, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yu Jianqing,Jiang Jingbo,Gong Dejun,et al. Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2011,29(3):691-701.
APA Yu Jianqing,Jiang Jingbo,Gong Dejun,Li Siren,&Xu Yongping.(2011).Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,29(3),691-701.
MLA Yu Jianqing,et al."Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 29.3(2011):691-701.
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