globalchange  > 气候变化事实与影响
CSCD记录号: CSCD:5938858
论文题名:
隔河岩水库二氧化碳通量时空变化及影响因素
其他题名: Tempo-spatial Variations and Influential Factors of Carbon Dioxide Emissions from the Geheyan Reservoir over the Qingjiang River Basin, China
作者: 赵登忠1; 谭德宝1; 李翀2; 申邵洪1
刊名: 环境科学
ISSN: 0250-3301
出版年: 2017
卷: 38, 期:3, 页码:354-363
语种: 中文
中文关键词: 清江流域 ; 隔河岩水库 ; 水库碳循环 ; 二氧化碳通量 ; 时空变化规律
英文关键词: Qingjiang River Basin ; Geheyan Reservoir ; carbon cycle from reservoir ; carbon dioxide fluxes ; spatial and temporal distribution
WOS学科分类: ENVIRONMENTAL SCIENCES
WOS研究方向: Environmental Sciences & Ecology
中文摘要: 随着气候变化研究的深入,大型河流拦截工程对水域碳循环及温室气体交换的影响引起越来越多的关注.为了评估河流拦截工程对水域生态系统碳循环和二氧化碳交换通量时空分布模式的影响,选择清江隔河岩水库作为典型案例,采用在线分析仪与浮箱相结合的方法,在2015年3月至2016年2月期间开展了完整水文年连续观测实验,获取了水库坝前、上游、支流、消落带与库湾等典型区域二氧化碳通量数据.数据分析结果表明隔河岩水库水气界面二氧化碳平均通量为(55.691866.3329) mg·(m~2·h)~(-1),呈现年内冬季高其他季节低的时间变化规律,空间上则表现为水库消落带坝前较低、典型库湾区域较高的分布格局.作为水库背景的库尾断面渔峡口区域二氧化碳通量季节变化非常稳定,在大部分时间内反而高于坝前和消落带断面的二氧化碳通量.数据分析表明二氧化碳通量时空分布格局受到水温、pH值和水体碳浓度的显著影响,但其相关程度受到季节和蓄水的双重影响.
英文摘要: Greenhouse gas emission from aquatic ecosystem will affect climate change on the regional and global scale. So large river interception project which affects the carbon cycle model and greenhouse gas emission from aquatic ecosystem has provoked more and more attentions in recent years. In order to understand and evaluate the effects of typical hydropower project construction on the aquatic ecosystem and carbon cycle, the Geheyan Reservoir, a typical river interception project, was selected as a typical case in this paper for measuring carbon dioxide fluxes from interface between water and atmosphere from March, 2015 to February, 2016. The integration of the online gas analyzer and floating box was used to obtain carbon dioxide fluxes from interface between water and atmosphere. Data was obtained over the before dam, upstream, tributary, drawdown area and bay area respectively for understanding the spatial Heterogeneity of carbon dioxide fluxes. Data analysis showed that yearly mean fluxes of carbon dioxide from the Geheyan Reservoir was (55.691 866.332 9) mg·(m~2·h)~(-1) during measurement, which indicated that the temporal distribution was higher in winter and lower in other seasons and the spatial variation was higher in typical bay and lower before dam as well as drawdown zone over the reservoir. Moreover, the seasonal variation of carbon dioxide fluxes from the interface between water and atmosphere was very stable at Yuxiakou measurement points as a typical background area of the reservoir, which was unexpectedly higher than those before dam and drawdown zone in the most months during measurement. The results from data analysis also indicated that the spatial and temporal variation of carbon dioxide fluxes from the Geheyan Reservoir was affected by water quality parameters such as dissolved oxygen, chlorophyll, pH, water temperature and conductivity and carbon in water, but the relationship between carbon dioxide fluxes and other parameter was very different within each season and impound period. So the results above will provide more supports for understanding the import pathway and transfer of aquatic carbon cycle caused by large river interception project in China.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/152615
Appears in Collections:气候变化事实与影响

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作者单位: 1.长江水利委员会长江科学院, 武汉, 湖北 430010, 中国
2.中国长江三峡集团公司, 北京 100038, 中国

Recommended Citation:
赵登忠,谭德宝,李翀,等. 隔河岩水库二氧化碳通量时空变化及影响因素[J]. 环境科学,2017-01-01,38(3):354-363
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