Estimation of Greenhouse Gas Fluxes in Water Based on Convection-Diffusion Model
DESALINATION AND WATER TREATMENT(2022)
摘要
Due to the spatial and temporal differences in greenhouse gas emissions at the water-air interface of reservoirs, it is difficult to estimate the greenhouse gas emissions from the reservoir accurately. In order to explore a new method for estimating greenhouse gas fluxes from reservoirs, a vertical transport model of greenhouse gases in waters is constructed based on the convection-diffusion model, and a set of physical experiments are carried out to test the rationality of the new model. The results show that vertical distributions of gas concentrations measured in experiments are identified to simulation results of the convection-diffusion model, so it is necessary to consider the convection term in gas transport in waters. In addition, the gas fluxes calculated by the convection-diffusion model are compared with those measured by the static floating chamber method, and the maximum relative error is 21.43%.
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关键词
Greenhouse gas,Convection,Diffusion,Flux estimation
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