SEASONAL VARIATIONS OF RIVERINE ORGANIC CARBON CONTENTS IN MAKOU AND HEKOU GAUGE STATIONS OF THE ZHUJIANG RIVER, CHINA  

作　　者：GAO Quan-zhou SHEN Cheng-de SUN Yan-min YI Wei-xi FU Jia-mo SHENG Guo-ying 

机构地区：[1]Department of Geography,Zhongshan University,Guangzhou 510275,P.R.China [2]Guangzhou Institute of Geochemistry,the Chinese Academy of Sciences,Guangzhou 510640,P.R.China

出　　处：《Chinese Geographical Science》2000年第4期15-21,共7页中国地理科学（英文版）

基　　金：This project was supported financially by the National Natural Science Foundation of China(No.49901002);the key funds of resources and eco-cnvironmental research of the CAS.(No.KZ952-J1-402);a funds of the state key lasoratory of organic geochemistry;Guangdong Province Science Funds(No.984131).

摘　　要：Water samples were collected and analyzed in high water season (July 1997) and in middle water season (October, 1997) from two main lower reach gauge stations of the Zhujiang (Pearl) River, namely Hekou and Makou, respectively. Content of particulate organic carbon is always higher than that of dissolved organic carbon in both seasons, which is obviously different from the global average pattern, i.e. dissolved organic carbon is the dominant component of the transported riverine organic carbon. The content of dissolved and particulate organic carbon changes with the water levels in a direct ratio. The percentage of organic carbon in total suspended substance changes with the content of total suspended substance in an inverse ratio. The more intense is the soil erosion in the drainage, the more concentrated is the riverine organic carbon in the river. The contribution of autochthonous organic carbon is larger in high water season than in middle water season.Water samples were collected and analyzed in high water season (July 1997) and in middle water season (October, 1997) from two main lower reach gauge stations of the Zhujiang (Pearl) River, namely Hekou and Makou, respectively. Content of particulate organic carbon is always higher than that of dissolved organic carbon in both seasons, which is obviously different from the global average pattern, i.e. dissolved organic carbon is the dominant component of the transported riverine organic carbon. The content of dissolved and particulate organic carbon changes with the water levels in a direct ratio. The percentage of organic carbon in total suspended substance changes with the content of total suspended substance in an inverse ratio. The more intense is the soil erosion in the drainage, the more concentrated is the riverine organic carbon in the river. The contribution of autochthonous organic carbon is larger in high water season than in middle water season.

关 键 词：organic carbon flux seasonal variation soil erosion Zhujiang River 

分 类 号：P592[天文地球—地球化学]