| 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
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| 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 |
| DOI | 10.1007/s00343-011-0164-x |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000292558100025 |
| 引用统计 | |
| 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 |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 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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