Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China
文献类型：CNKI期刊论文
| 作者 | Yu JQ(于建清); Jiang JB(姜静波); Gong DJ(龚德俊); Li SR(李思忍); Xu YP(徐永平) |
| 发表日期 | 2011-05-15 |
| 出处 | Chinese Journal of Oceanology and Limnology
 |
| 关键词 | suspended sediment settling velocity shear velocity acoustic backscatter tidal currents Beibu Gulf |
| 英文摘要 | 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 μm 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. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by Major Programs of the Chinese Academy of Sciences (No. H42032602) ; the National Natural Science Foundation of China (No. 470776061) |
| 卷 | v.29期:03页:201-211 |
| 语种 | 英文; |
| 分类号 | TV148.1 |
| ISSN号 | 0254-4059 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/191702]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.InstituteofOceanology,ChineseAcademyofSciences 2.GraduateUniversityofChineseAcademyofSciences 3.NationalCenterofOceanStandardsandMetrology |
| 推荐引用方式 GB/T 7714 | Yu JQ,Jiang JB,Gong DJ,et al. Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China. 2011. |
入库方式： OAI收割
来源：海洋研究所
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