三峡水库淤沙净碳排放量核算  

Estimation on net carbon emission from organic carbon transport caused by Three Gorges Dam

作　　者：邢冉 秦伯强[2] 包宇飞 戴江玉[4] 曾晨军 朱琳 施文卿 XING Ran;QIN Bo-qiang;BAO Yu-fei;DAI Jiang-yu;ZENG Chen-jun;ZHU Lin;SHI Wen-qing(College of Environmental Science and Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China;State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China;China Institute of Water Resources and Hydropower Research,State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,Beijing 100038,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210029,China;Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China)

机构地区：[1]南京信息工程大学环境科学与工程学院,江苏南京210044 [2]中国科学院南京地理与湖泊研究所,湖泊科学与环境国家重点实验室,江苏南京210008 [3]中国水利水电科学研究院,流域水循环模拟与调控国家重点实验室,北京100038 [4]南京水利科学研究院,水文水资源与水利工程科学国家重点实验室,江苏南京210029 [5]广东省水利水电科学研究院,广东广州510635

出　　处：《中国环境科学》2023年第4期1930-1936,共7页China Environmental Science

基　　金：国家自然科学基金面上项目(51979171,42277060);江苏省碳达峰碳中和科技创新专项(BK20220041);南京信息工程大学引进人才项目(2021r097)。

摘　　要：为厘清三峡水库净碳排放量,通过对比分析三峡大坝建设与未建设情景下泥沙携带有机碳在河道中迁移转化过程,核算了两种情景下碳排放通量.结果表明:三峡大坝不仅没有增加反而降低了泥沙在河道输送过程中产生的碳排放通量,降幅达到(23.24±1.05)%.三峡大坝对有机碳输送产生明显再分布效应,将有机碳分解与碳排放热区从长江口转移至库内.虽然水库缺氧环境促进甲烷产生,但较高的有机碳埋藏率促使碳排放量下降.In order to quantify net carbon emissions from the Three Gorges Reservoir,China,this study clarified carbon biogeochemical cycles,and estimated carbon emissions during organic carbon(OC)transport along Yangtze River in the scenarios with and without Three Gorges Dam.Results demonstrated that Three Gorges Dam doesn’t increase but decreases carbon emissions by(23.24±1.05)%.Three Gorges Dam redistributes OC and transfers the hot spots of OC decomposition and carbon emissions from Yangtze River estuary to Three Gorges Reservoir.In the reservoir,the effective OC burial decreases net carbon emissions,although anoxic conditions enhance methane production.

关 键 词：三峡水库 净碳排放 泥沙 温室气体 

分 类 号：X14[环境科学与工程—环境科学] TV62[水利工程—水利水电工程]