Online measurement device of gas flux on air-water interface of riverway

Abstract

The invention discloses an online measurement device of gas flux on an air-water interface of a riverway, and relates to the fields of environmental protection and comprehensive utilization of resources. A plurality of flux chambers are arranged along a flow direction through a sling and a latch hook according to distribution of gauss integration points so that the measuring speed and accuracy can be improved and the application range of the flux chamber measuring method can be widened, and the flux chambers are connected to a gas analyzer through a ventilation hose and an electromagnetic flux valve one by one, and meanwhile, the ratio of throughput of each flux chamber is distributed according to the weight ratio of the integration points through the electromagnetic flux valve. Therefore, rapid and accurate online measurement of the gas flux on the air-water interface of the riverway can be achieved.

Description

technical field [0001] The invention relates to the fields of environmental protection and resource comprehensive utilization, in particular to an online measuring device for gas flux at the water-air interface of a river. Background technique [0002] In order to ascertain the changes in the absorption and emission of greenhouse gases in waters and their impact on the environment under the condition of global warming, it is necessary to analyze and study the gas flux at the water-air interface. At present, most of the research on greenhouse gas emissions in water areas is based on the flux that diffuses into the atmosphere through the water surface. The mechanism has developed various monitoring methods for greenhouse gas fluxes, the main categories include model estimation method (stoichiometric method), flux box method, micrometeorological method, remote sensing inversion method, etc. Among them, the flux box method is moderately priced and can quickly The transportation...

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Problems solved by technology

However, if the bottom area of ​​the flux box is increased, it is inconvenient to carry and is not suitable for long-term field monitoring. At the same time, the volume of the flux box will be increased, which will cause too long sampling time and affect the monitoring efficiency. Furthermore, the wall of the flux box and the water surface will also be increased. friction, too much artificially changing the turbulence, the measured diffusion flux will deviate from the actual

It is not easy to measure when the flux box freely moves with the water on the lake and river surface. First, in the case of real-time online measurement, the instrument is heavy and difficult to drift with the flux box. In addition, for rivers with more human interference, the drift scheme It is impossible to avoid sailing ships, cargo ships, etc., and it is easy to cause harm to surveyors and measuring instruments. Therefore, it is necessary to adopt new methods and equipment to improve the measurement accuracy of water-air interface flux under dynamic conditions in the river.

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