清江流域水布垭水库温室气体交换通量监测与分析研究  

Measurement and Analysis of Greenhouse Gas Fluxes from Shuibuya Reservoir in Qingjiang River Basin

作　　者：赵登忠[1,2] 谭德宝[1] 汪朝辉[1] 郝超英[1] 

机构地区：[1]长江科学院空间信息技术应用研究所,武汉430010 [2]中国长江三峡集团公司,湖北宜昌443002

出　　处：《长江科学院院报》2011年第10期197-204,共8页Journal of Changjiang River Scientific Research Institute

基　　金：水利部公益性科研院所基本科研业务费项目(CKSF2010008)

摘　　要：为了研究水库温室气体源汇变化,选择清江流域水布垭水库作为研究案例,在2010年5月和10月开展了2次原位观测试验,获取了水布垭水库水气界面二氧化碳和甲烷交换通量、水体上空大气温室气体浓度垂直变化规律及水环境因子。结果表明:水布垭水库2010年5月份水体上空大气二氧化碳浓度在0.5 m高度以下最高,其中表层水温对水库水体二氧化碳源汇地位具有重要的影响;2010年10月份水布垭水库水气界面二氧化碳和甲烷交换通量呈排放状态,平均通量分别为3 740.92±1 872.56 mg.m-2.d-1和1.22±0.57 mg.m-2.d-1,但比世界温带和热带主要水库要低得多,接近于中国太湖和东湖等自然水体排放水平;二氧化碳通量的空间分布从上游到坝前呈现升高的趋势,而甲烷的空间分布趋势则呈现相反的趋势。研究将为我国水库温室气体科学研究提供了宝贵的示范案例,为开展水电清洁能源开发提供科学支撑。The Shuibuya Reservoir on Qingjiang River was selected to illustrate the source and sink of greenhouse gas from the cascade hydroelectric power stations.In-situ measurements were carried out in May and October,2010 to obtain carbon dioxide and methane exchange fluxes from water-atmosphere interface of the reservoir,the vertical profile of greenhouse gas concentration above water-body and the aquatic environmental factors respectively.It is revealed that the highest carbon dioxide concentration measured in May,2010 was below 0.5 meter in the vertical profile,and the water surface temperature has the largest effect on the concentration change and fluxes of carbon dioxide from the reservoir＇s water-body.Overall,carbon dioxide and methane was emitting from the water-atmosphere interface of Shuibuya Reservoir＇s water-body in October,2010,with the mean fluxes amounting 3 740.92±1 872.56 mg·m-2·d-1 and 1.22±0.57 mg·m-2·d-1 respectively,close to those from Taihu Lake and East Lake and other natural water bodies in China,much lower than those from the reservoirs in the tropic or temperate zones.The carbon dioxide fluxes increased from the upstream to the dam;while methane fluxes presented to be the opposite.This study provided in-situ measured data for understanding the sink and source of greenhouse gas emission from reservoirs and scientific support for the development of hydroelectric clean energy of the upstream Yangtze River.

关 键 词：水布垭水库 水库温室气体 交换通量 水气界面 

分 类 号：X831[环境科学与工程—环境工程] X13