中文摘要：

河流的溶解的器官的碳(文档)的整个年分析 Xijiang 河( XJR )里的集中，华南，证明在 XJR 的吝啬的河流的文档集中( 1.24 mg L1 )是比几条主要的河里的全球河流的文档集中的平均价值( 5.75 mg L1 )尤其是低的。有在 XJR 的 DOC 信号的一个不引人注目的每月的变化，但是然而，在半年一次的时间规模上，河流的文档集中有水文学季节之间的重要差别。文档水平在洪水季节(1.18 mg L1 ) 期间是不到那在 nonflood 季节(1.40 mg L1 ) 期间。由于在高水位线的时期期间涌出和流量的冲淡效果的共存，有在 XJR 的分泌物的河流的文档集中的变化不同于在许多另外的主要的河里报导了那。在 Wuzhou 的城市上面的文档出口流动是大约 0.62 ??? ü

英文摘要：

A whole year analysis of riverine dissolved organic carbon （DOC） concentrations in the Xijiang River （XJR）, South China, showed that the mean riverine DOC concentration （1.24 mg L-1） in the XJR was notably lower than the averaged value （5.75 mg L-1） of the global riverine DOC concentration in several major rivers. There is an inconspicuous monthly fluctuation of the DOC signal in the XJR, but on a semi-yearly time scale, however, the riverine DOC concentration had significant difference between hydrological seasons. The DOC level during the flood season （1.18 mg L-1） was less than that during the non-flood season （1.40 mg L-1）. Owing to the concomitance of the flushing and dilution effects of the runoff during the high-water period, the variation of riverine DOC concentration with discharge in the XJR differed from that reported in many other major rivers. The DOC export flux above the city of Wuzhou was about 0.62× 106 g C km-2 yr-1. The DOC transported during the ＂056＂ Massive Flood period comprised 30.35% of the annual total, while the discharge accounted for 36.32% of the total annual flow. The characteristics in riverine DOC concentration in the XJR were attributed to the combined effect of the geomorphologic, monsoon climatic and hydrological processes as well as land-use within the drainage basin.