引江济太对太湖贡湖湾氧化亚氮通量的影响

刘臻婧; 肖启涛; 胡正华; 张弥; 王伟; 肖薇

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中国环境科学 ›› 2020, Vol. 40 ›› Issue (12) : 5229-5236.

大气污染与控制

引江济太对太湖贡湖湾氧化亚氮通量的影响

刘臻婧^1,2, 肖启涛², 胡正华¹, 张弥³, 王伟³, 肖薇³

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Effects of water diversion from Yangtze River to Lake Taihu on N₂O flux in Gonghu Bay, Lake Taihu

LIU Zhen-jing^1,2, XIAO Qi-tao², HU Zheng-hua¹, ZHANG Mi³, WANG Wei³, XIAO Wei³

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摘要

选取引江济太工程中长江来水进入太湖第一站的贡湖湾为研究对象，基于2011年11月~2013年8月在贡湖湾的逐月野外调查，同时以湖心水域为参考，探讨引江济太对湖体N₂O通量的影响.结果表明，贡湖湾N₂O排放通量要显著高于湖心排放量，其N₂O通量均值分别为6.9，2.1μmol/（m²·d），但在非引水期间2个湖区的N₂O通量无显著差异.贡湖湾和湖心N₂O通量呈现明显的季节变化，且均与水温呈显著负相关关系，但因受外源来水的影响，贡湖湾N₂O通量的温度依赖程度相对较低.另外，2个湖区的N₂O通量还与营养盐等因素有关.总体上，外源引水提高了贡湖湾N₂O排放通量，但考虑到湖泊N₂O通量受到内部和外部因子的综合协同影响，外源引水对湖泊N₂O通量的具体调控机理还需要进一步探讨.

Abstract

As the first station for monitoring the Yangtze River water diverted to Lake Taihu, Gonghu Bay was the best place to investigate the effects of water diversion on N₂O flux. Monthly measurements were conducted in Gonghu Bay and in the central zone of Lake Taihu from November 2011 to August 2013. N₂O flux in Gonghu Bay was significantly higher than that in central zone, with a mean value being 6.9 and 2.1μmol/(m²·d), respectively. However, the N₂O flux showed insignificant differences between these two zones when no water was diverted. Seasonal variability of the N₂O flux in these two zones were illustrated, which was negatively correlated with water temperature. Water diversion may complicate the effect of temperature on N₂O flux at Gonghu Bay. Water diversion increased the lake N₂O emission flux, while lake N₂O flux is controlled by multiple and interconnected internal and external factors, further studies are needed to explore the underlying control mechanisms.

导出引用

刘臻婧, 肖启涛, 胡正华, 张弥, 王伟, 肖薇. 引江济太对太湖贡湖湾氧化亚氮通量的影响[J]. 中国环境科学. 2020, 40(12): 5229-5236

LIU Zhen-jing, XIAO Qi-tao, HU Zheng-hua, ZHANG Mi, WANG Wei, XIAO Wei. Effects of water diversion from Yangtze River to Lake Taihu on N₂O flux in Gonghu Bay, Lake Taihu[J]. China Environmental Science. 2020, 40(12): 5229-5236

中图分类号： X511

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