大黑汀水库夏秋季节温室气体赋存及排放特征

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Abstract As a typical entrophic reservoir in North China, the surface water of 27 sites in Daheting Reservoir was sampled and the concentrations of surface dissolved carbon dioxide (CO₂), methane (CH₄) and nitrous oxide (N₂O) were determined by using headspace equilibrium method, to estimate its water-gas interface diffuse flux in the summer and autumn in 2018. Results indicated that the surface of Daheiting Reservoir was mainly a source of CO₂, CH₄ and N₂O. The mean values of CO₂ concentration and diffusion flux were (72.75±67.49)μmol/L and (810.62±790.64)μmol/(m²·h) in summer, and were (394.64±104.13)μmol/L and (4822.81±1250.00)μmol/(m²·h) in antumn, respectively. The mean concentration and diffusion flux of CH₄ were (0.19±0.12)μmol/L and (3.04±2.10)μmol/(m²·h) in summer, and were (0.41±0.26)μmol/L and (5.16±3.23)μmol/(m²·h) in autumn, respectively. The mean values of N₂O concentration and diffusion flux were (0.03±0.01)μmol/L and (0.31±0.10)μmol/(m²·h) in summer, and were (0.03±0.01)μmol/L and (0.25±0.15)μmol/(m²·h) in autumn, respectively. The results of correlation analysis indicated that the concentrations of dissolved CO₂ and N₂O were mainly correlated with temperature, water depth and conductivity, while CH₄ concentration was mainly correlated with water depth and conductivity in summer. Concentrations of dissolved CO₂ was mainly correlated with temperature, water depth and TDS, while CH₄ concentration was mainly correlated with temperature, water depth and TDS, while N₂O concentration was mainly correlated with water depth.

Key words： greenhouse gases dissolution concentration flux influencing factors Daheiting Reservoir

Received: 12 April 2019

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X511

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	Articles by authors
	GONG Wan-qing
	WEN Shuai-long
	WANG Hong-wei
	WU Tao
	LI Xin
	ZHONG Ji-cheng

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GONG Wan-qing,WEN Shuai-long,WANG Hong-wei等. Characteristics of greenhouse gas occurrence and emission in summer and autumn of Daheiting Reservoir[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4611-4619.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I11/4611

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