Acoustic observation of thick suspended-sediments

ZHANG Shu-ying; QIAN Bing-xing

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ZHANG Shu-ying, QIAN Bing-xing. Acoustic observation of thick suspended-sediments[J]. Haiyang Xuebao, 2003, 25(6): 54-60.

Citation:

ZHANG Shu-ying, QIAN Bing-xing. Acoustic observation of thick suspended-sediments[J]. Haiyang Xuebao, 2003, 25(6): 54-60.

ZHANG Shu-ying, QIAN Bing-xing. Acoustic observation of thick suspended-sediments[J]. Haiyang Xuebao, 2003, 25(6): 54-60.

Citation:

ZHANG Shu-ying, QIAN Bing-xing. Acoustic observation of thick suspended-sediments[J]. Haiyang Xuebao, 2003, 25(6): 54-60.

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Acoustic observation of thick suspended-sediments

Shanghai Acoustics Laboratory, Chinese Academy of Sciences, Shanghai 200032, China

Received Date: 2003-02-28
Rev Recd Date: 2003-04-06

Abstract

Abstract

Based on theoretical and experimental studies of acoustic attenuation in thick suspended sediments, two types of acoustic observation instruments for real-time measurements of the bulk-density profile of suspended-sediments (UBD-500/1500 ultrasonic bulk-density meter) have been developed and applied to surveying the fluidmud in the Changjiang waterway and to the observations of mud and sand in the Xiaolangdi Reservoir of the Huanghe River.The principle of measurement and design and calibration of the instrument are discussed in detail.The specifications of the instruments are as follows: the range of measurement is 800 kg/m³ (for UBD-500) and 50 kg/m³ (for UBD-1500), the error of measurement is ±5% (F.S.).Comparing with other kinds of instruments for measuring suspended sediments (OBS, ABS, infr ared or γ-ray meter), the main advantage of the ultrasonic bulk density meter by way of acoustic attenuation measurement is that the calibration to the instrument is relatively more stable and easier.
- thick suspended sediment,
- acoustic observation,
- measurement principle of acoustic attenuation

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References(13)

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