Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China

Jianqing Yu; Jingbo Jiang; Dejun Gong; Siren Li; Yongping Xu

doi:10.1007/s00343-011-0164-x

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Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China

OriginalPaper | Updated：2023-05-16

- Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China
- Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China
- 海洋湖沼学报（英文） 2011年29卷第3期页码：691-701
- Affiliations：
  
  1. Institute of Oceanology Chinese Academy of Sciences
  2. Graduate University of Chinese Academy of Sciences
  3. National Center of Ocean Standards and Metrology
- Author bio：
- Funds：
  
  Supported by Major Programs of the Chinese Academy of Sciences (No. H42032602) and the National Natural Science Foundation of China (No. 470776061)
- DOI：10.1007/s00343-011-0164-x
  中图分类号：
- 网络首发：2011-05-15，
  
  纸质出版：2011
- Accepted：
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Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China[J]. 海洋湖沼学报（英文）, 2011,29(3):691-701.

Yu, J., Jiang, J., Gong, D. et al. Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China., Chin. J. Ocean. Limnol. 29, 691–701 (2011). https://doi.org/10.1007/s00343-011-0164-x
Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China[J]. 海洋湖沼学报（英文）, 2011,29(3):691-701. DOI： 10.1007/s00343-011-0164-x.

Yu, J., Jiang, J., Gong, D. et al. Determining suspended sediment concentration and settling velocity from PC-ADP measurements in the Beibu Gulf, China., Chin. J. Ocean. Limnol. 29, 691–701 (2011). https://doi.org/10.1007/s00343-011-0164-x DOI：

摘要

Abstract

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.

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references

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