Device and method for continuously measuring release flux of bubbles in water body

Abstract

The invention discloses a device and a method for continuously measuring the release flux of bubbles in a water body. The device comprises a collector, a closed tank body and a circuit device. The closed tank body is a closed hollow cylinder, and the bottom of the closed tank body is provided with a small circular hole. A section of steel pipe is connected outside the small round hole. A conical funnel is connected below the steel pipe. The collector is of a funnel-shaped structure and is used for capturing bubbles in a capturing area in the water body. The open end of the conical funnel is connected with the necking end of the collector. A glass tube is connected above the small circular hole, and the upper end of the glass tube penetrates out of the upper part of the closed tank body. The circuit device comprises a sensor, a storage circuit board and a battery. The sensor is fixed on the glass tube, and the storage circuit board and the battery are fixed at the bottom of the closed tank body. According to the invention, long-time sequence continuous monitoring can be carried out in a water body for about one month, the monitoring time is long enough, errors generated by short-time monitoring are eliminated, and the accuracy and credibility of a monitoring result are improved.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, relates to the water environment, in particular to a device and method for continuously measuring the release flux of air bubbles in a water body. Background technique [0002] A large amount of organic matter and nutrient salts are deposited at the bottom of natural water bodies with low flow rates such as reservoir bays and lakes. Under the action of microorganisms, various gases will be produced in the sedimentary layer through a series of aquatic bio-hydrochemical processes, such as Carbon dioxide, methane, nitrogen, nitrous oxide, etc. These gases continue to accumulate and migrate in the sedimentary layer. When certain conditions are met, the accumulated gas will emerge from the sedimentary layer into the water body in the form of bubbles, and move upward under the action of buoyancy. [0003] Since the gases such as methane, nitrous oxide, and carbon dioxide produced by t...

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Problems solved by technology

[0004] The main problems in the existing technology include: due to the changeable and complex natural environment during in-situ observation, the spatio-temporal distribution of bubbles is uneven and uncertain, and if the monitoring time is too short, it will inevitably be different from the actual situation. error, so how to carry out long-sequence continuous monitoring will be the key to accurately measure the bubble volume flux

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