System, method and application for in-situ continuous long-term determination of greenhouse gas concentration in high turbidity water bodies

Abstract

The invention discloses an in-situ continuous long-term measurement system for greenhouse gas concentration in high turbidity water body, comprising: a filter, a diaphragm pump, a balance chamber, a gas drying pipe, a greenhouse gas measuring instrument, a water pipe and a trachea. The invention also discloses a measurement method based on the above system, which includes: continuously extracting the water body to be monitored through a diaphragm pump, removing most of the suspended particles through a filter connected to the water pipe, and passing through the atomized nozzle mist after the water sample enters the balance chamber. Turned into small water droplets, the volume of the liquid entering the balance chamber exceeds a fixed height and then overflows. After the system reaches a stable state for 15 minutes, use a greenhouse gas detector to measure the concentration of greenhouse gases in the air at the top of the balance chamber, which can be converted into the concentration in the water at the current time by calculation. greenhouse gas concentration. The invention also discloses an application of the above-mentioned system and method in in-situ continuous measurement of greenhouse gas concentration in high turbidity water bodies.

Description

technical field [0001] The invention belongs to the field of environment, and relates to a system and a method for in-situ continuous long-term measurement of greenhouse gas concentration in high turbidity water bodies. Background technique [0002] Under the joint influence of global climate change and human activities, the water environment is facing increasingly serious problems. The increasing red tide and eutrophication problems sound the alarm for the current situation of water resources. Under the promotion and call of the state, local governments at all levels are paying more and more attention to the protection and restoration of the water environment. Long-term continuous monitoring of environmental water quality can be used to explore the changing laws and influencing factors of the water environment and provide important references for the rational use of water resources. . [0003] Greenhouse gases dissolved in water, such as CO 2 , CH 4 , N 2 O, its concent...

AI Technical Summary

Problems solved by technology

This method requires strict sampling process and sampling environment, complex pre-treatment process, but it is still difficult to avoid the impact of human improper operation or sample transportation and storage on the determination of greenhouse gases

In addition, the traditional method takes a long time to test samples and is expensive, which greatly limits the number of samples measured, and the low-frequency data results make it difficult to have an accurate understanding of the dynamic change process of greenhouse gases

Some greenhouse gas in-situ observation systems can be used in open oceans and clean groundwater, but for lakes, wetlands, and coastal water systems affected by land runoff, the existing observation systems often face serious contamination and blockage, affecting observation Effect

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