城市化对西充河表层水温室气体的影响

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中图分类号：X142；X522 文献标志码：A 文章编号：1673-5072（2025）04-0350-08

Effect of Urbanization on Greenhouse Gases in Surface Water of the Xichong River

LUODana，YANG Yan‘，WU Xi-qiaoa，CHEN Jiana，LIU Chao-rong （a.College of Environmental Science and Engineering，b.School of Mathematics & Information， China West Normal University，Nanchong Sichuan 6370o9，China）

Abstract：In order to explore the main influencing factors of urbanization on the concentrations and emission fluxes of greenhouse gases in rivers，greenhouse gas samples were collected through headspace bottle method，and the dissolved concentration and emission fluxes were calculated.The results show that the concentrations and emission fluxes of CO2，CH4 and N2O are on the rise along the direction of increasing urbanization in the Xichong River.The concentrations of CO2，CH4 and N2O in urban section are 1.28， 7.90 and1.41 times of those in rural section，and the emission fluxes in urban section are 3.75，12.57 and 2.97 times of those in rural section，respectively.The concentration and emission fluxes of CO2 ， CH4 and N2O are significant positively correlated with TP，DTP and PO43--P ，indicating that the production and emissions of greenhouse gases are mainly affected by phosphorus.The urbanization process in the basinsignificantly affects the spatial pattern of water environment quality and greenhouse gas emissions.The organic matter in the river is regulated by nutrients，which affects the production and emissionsof greenhouse gases.Therefore，reducing the input of nutrients is of great significance for reducing greenhouse gas emissions in the Xichong River，

Keywords：Xichong River;urbanization process;greenhouse gas;emission flux;influencing factor

近年来温室气体含量不断攀升，导致极端高温、极端降水等诸多环境问题，受到了各国的普遍关注[1]。（剩余11655字）