4th International Submarine Canyon Symposium (INCISE2018)

5-7 November 2018, Shenzhen, CHINA

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This is the detail of A new method for measuring the sediment concentration in seawater: by using Conductivity-Temperature (CT) sensors.

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Author
Zhiwen Wang
Co-Author(s)
Jingping Xu
Abstarct Title
A new method for measuring the sediment concentration in seawater: by using Conductivity-Temperature (CT) sensors.
Abstarct Body
Continuous local sediment concentration measurements in a turbulent field are of great significance in the study of mass transport. And it can be measured by acoustic and optical sensors in most cases. Except in super-high turbid water or flows (e.g. turbidity currents or slurries), where the concentration (over dozens of grams per liter) in excess of the sensors maximum recording level. The working principle of CT sensors indicates that high-concentrated sediment in seawater can create bias of conductivity measurements. In this study, the relationship between sediment concentration and conductivity of water-sediment mixture was formulated, and these formulas can be used as a new method to estimate the sediment concentration. A series of lab experiments were conducted to verify the reliability of the formulas. And the results show that this method works well in large range of grain size and temperatures.
INCISE Theme
Session 2: New ways to study submarine canyons: integrated programmes, new technologies and coordinated monitoring efforts
Presentation Type
Poster Presentation
Keywords
Turbidity current, Conductivity

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