黄河调水调沙与雨致洪水导致水体pCO_2控制机制的差异  

The Difference of Influencing Factors of Partial Pressure of CO_2 Between the Water and Sediment Regulation and the"05.7"Flood in the Huanghe (Yellow) River

作　　者：孙超[1] 张龙军[1] 江春波[1] 

机构地区：[1]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2007年第S1期78-82,共5页Periodical of Ocean University of China

基　　金：国家重点基础研究发展规划项目(2002CB412501);国家自然科学基金项目(40476063)资助

摘　　要：根据2005年黄河调水调沙期间和"05.7"洪水时期利津站pCO_2的实测数据,结合水文、化学、生物等数据,对黄河调水调沙期间和洪水时期下游水体pCO_2的影响因素进行研究。结果表明:调水调沙期间黄河水体表现出低pCO_2、高DIC、高DO的特征;与之相反,洪水时期黄河水体表现出高pCO_2、低DIC和低DO的特征;调水调沙期间黄河下游水体pCO_2受碳酸盐体系的控制,高含量的泥沙对碳酸盐体系的缓冲作用产生了高的pCO_2;洪水时期下游水体pCO_2受生物耗氧呼吸作用的控制,降雨对地表的冲刷作用带来了大量的陆源易降解有机物,促进了生物耗氧呼吸作用,从而产生了高的pCO_2。In combination with the hydrological,chemical and biological,the partial pressure data of CO_2 (pCO_2)of the Yellow River were studied based on the data collected in Lijin during the water and sediment regulation and'05.7'flood in 2005 to determine the major factors that impact the pCO_2.The results indicate that during the water and sediment regulation there was low pCO_2 high DIC and high DO,but during the'05.7'flood there was high pCO_2,low DIC and low DO;during the water and sediment regulation the pCO_2 in the lower reaches was controlled by the carbonate system and large amounts of sediments buffering the car- bonate system led to high pCO_2;during the'05.7'flood the pCO_2 was controlled by biological respiration and biological organisms carried by rainfall enhancing biological respiration led to high pCO_2.

关 键 词：调水调沙 “05.7”洪水 二氧化碳分压(pCO₂) 影响因素 

分 类 号：P734.22[天文地球—海洋化学]