Estuary suspended sediment concentration real-time measuring method based on sound attenuation

Abstract

The invention discloses an estuary suspended sediment concentration real-time measuring method based on sound attenuation. The estuary suspended sediment concentration real-time measuring method basedon the sound attenuation comprises the steps that an underwater sound signal sending end and a receiving end are arranged in an estuary, sound attenuation is calculated, acoustic attenuation disturbance caused by suspended sediment is calculated, and the suspended sediment concentration is iteratively calculated. According to the estuary suspended sediment concentration real-time measuring methodbased on the sound attenuation, covering areas are wide, the expandability is high, obtained parameters are more continuous in space, the detecting instantaneity is good, and the measuring precisionis high. Sound propagation technology is adopted for measuring, and the performance is better and development and application potentiality are more achieved compared with light, electromagnetic wave and other modes.

Description

technical field [0001] The invention relates to the technical field of ocean observation, in particular to the technical field of marine suspended sediment measurement, and more particularly to a method for real-time measurement of suspended sediment concentration in sea estuaries based on sound attenuation. Background technique [0002] Now in the mouths of rivers and rivers, a large amount of suspended sediment is transported into the sea, making the sea water in the nearby sea turbid. The size and change of sediment transport volume play an important role in the changes and development of water quality and underwater topography, and also affect the changes in the ecosystem in seawater, and at the same time affect the use and construction of coastal areas by humans. Under the action of tides and water body flow, sediments are constantly floating, migrating, and settling, which has a great impact on ports, water conservancy, and river and coast projects. The migration proc...

AI Technical Summary

Problems solved by technology

To address this shortcoming, the method of towing a ship is usually used to obtain large-scale data in the horizontal direction, but the information lacks time continuity

There is also a method of origin collection designed, that is, put the device into the water, collect the concentration data regularly and store it, take it out after a few days, and read the data. Although this method has continuity in time, the collection is only at a fixed point in space. data

[0005] On the other hand, when the sound wave propagates in the suspension, the particles and the fluid move relative to each other, and viscous absorption and scattering occur, resulting in the energy attenuation of the sound wave in the direction of propagation.

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