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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
发表期刊CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
卷号29期号:3页码:691-701
文章类型Article
摘要Modeling 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.
关键词Suspended Sediment Settling Velocity Shear Velocity Acoustic Backscatter Tidal Currents Beibu Gulf
DOI10.1007/s00343-011-0164-x
收录类别SCI
语种英语
WOS记录号WOS:000292558100025
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/32928
专题海洋环境工程技术研究发展中心
作者单位1.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
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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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