Journal of Tropical Oceanography ›› 2022, Vol. 41 ›› Issue (4): 20-30.doi: 10.11978/2022006CSTR: 32234.14.2022006

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Research progress in the continuous measurement technology of suspended sediment concentration

LI Weihua(), LI Jiufa, ZHANG Wenxiang()   

  1. State Key Laboratory of Estuarine & Coastal Research Center, East China Normal University, Shanghai 200062, China
  • Received:2022-01-12 Revised:2022-02-16 Online:2022-07-10 Published:2022-02-22
  • Contact: ZHANG Wenxiang E-mail:whli@sklec.ecnu.edu.cn;wxzhang@sklec.ecnu.edu.cn
  • Supported by:
    Joint Key Funds of National Natural Science Foundation of China(U2040202);Fundamental Research Funds for the Central Universities

Abstract:

Continuous measurement technology of suspended sediment concentration is the most fundamental requirement in the research fields of hydraulics, environmental science, estuarine and coastal science, as well as marine science. The current popular technical routes including optical backscattering and transmission, specular reflection, remote sensing, acoustic backscattering and transmission attenuation, tuning fork resonance, pressure difference and gamma-ray attenuation and other principles of technical methods were summarized in this paper. The main advantages and problems of each technical method are then discussed, and the future research focus and development direction are prospected as: (1) the principle of optical backscattering is the optimal technical route for low-cost, miniaturized, and high-time-frequency measurement of suspended sediment concentration, and is necessary to focus on range expansion and particle size sensitivity weakening study; (2) low uncertainty suspended sediment concentration profile measurement relies on the development of the acoustic backscattering technical route; (3) the tuning fork resonance technical route is particularly suitable for ultra-high range application scenarios under turbid current and fluid mud conditions; (4) integrate multi-technology sensors and use the artificial intelligence algorithms to replace traditional inverse theory model, etc.

Key words: suspended sediment concentration, continuous measurement technology, optical turbidity measurement, acoustic suspended sediment concentration measurement, tuning folk densimeter

CLC Number: 

  • P761