不同时期东洞庭湖水域碳素赋存特征及其影响因素  

Characteristics of carbon storage and its influencing factors in waters of East Dongting Lake in different periods

作　　者：王丽婧[1] 朱怡帆 田泽斌[1] 纪道斌[2] 杨忠勇[2] 李莹杰[1] 刘佳[2] 孟江槐 WANG Li-jing;ZHU Yi-fan;TIAN Ze-bin;JI Dao-bin;YANG Zhong-yong;LI Ying-jie;LIU Jia;MENG Jiang-huai(State Environmental Protection Scientific Observation Station of the Dongting Lake,Chinese Academy of Environmental Sciences,Beijing 100012,China;College of Hydraulic and Environmental Engineering,China Three Gorges University,Yichang 443002,China)

机构地区：[1]中国环境科学研究院,国家环境保护洞庭湖科学观测研究站,北京100012 [2]三峡大学水利与环境学院,湖北宜昌443002

出　　处：《中国环境科学》2023年第5期2542-2552,共11页China Environmental Science

基　　金：国家重点研发计划重点专项(2021YFC3201003);水利部三峡司委托项目(JJ2017-028);国家自然科学基金资助项目(U204022,52079069,52009066,51909135)。

摘　　要：2022年4月平水期及2022年7月丰水期对洞庭湖区域进行调查采样,同步检测各环境因子;基于水体酸碱平衡、亨利定律及室内实验,计算水体各碳素赋存含量,并分析各影响因素.结果表明:不同时期东洞庭湖水域各碳素赋存含量均呈现出溶解性无机碳(DIC)>溶解态有机碳(DOC)>颗粒态有机碳(POC)>颗粒态无机碳(PIC)的特征.水位变动、水体理化因子、湘江来流和温室气体分压对东洞庭湖水域碳素赋存含量有较大影响;不同时期水温(Temp)、pH值、溶解氧(DO)与叶绿素a(Chl-a)含量对碳素赋存含量影响差异性显著.The acid-base balance of the water body,Henry's law and indoor experiments,the carbon content of each water body along with their key environmental factors in East Dongting Lake(EDL)were monitored during normal season in April 2022 and flood season in June 2022.The results show that the content magnitude of each carbon component in EDL in different periods was in the order of dissolved inorganic carbon(DIC)>dissolved organic carbon(DOC)>particulate organic carbon(POC)>particulate inorganic carbon(PIC).The main influencing factors included water level variation,physical and chemical factors of water,inflow of Xiangjiang River and partial pressure of greenhouse gases.The effects of water temperature(Temp),pH value,dissolved oxygen(DO)and chlorophyll a(Chl-a)on carbon content varied significantly with sampling season.

关 键 词：东洞庭湖 平水期 丰水期 碳素赋存 影响因素 

分 类 号：X171.1[环境科学与工程—环境科学]