广州感潮河段底泥有机质特征

珠江广州河段水文水质特征受感潮作用影响很大，因感潮上溯作用，靠近市区河段的严重污染，不仅对下游水质造成影响，而且对上游珠江西航道和流溪河这一重要水源区的水质有影响。本研究分析了广州上游珠江西航道和流溪河这一河段底泥中有机质特征，从有机地球化学角度探讨感潮作用对广州市上游水质的影响范围和程度，指明鸦岗以上河段受感潮作用影响很小，而西村和石门则受较大程度影响，有机质呈明显人为污染特征。本研究同时表明有机地球化学原理方法可以应用于探讨河流水文水质。

Characteristics of the Organic Matter in Tidalvers Guangzhou

The hydrological character and water quality of the Pearler in Guangou are greatly affected bytidal action. In the Pearl River the west channel and the Liuxi river, as main water sources inGuangzhou, are in the upstream of the urban city of Guangzhou, and their water quality is greatly dete-riorated by the heavily polluted water going upstream from down stream due to tidal action, so it is ofgreat importance to investigate in what degree and in what range the source water quality is influencedby tidal action for the purpose of the protection and utilization of water resources. This paper carried outanalyses of the organic matter in bottom sediments from down stream to upstream in the water sourcearea, and was a biomarker approach to the influence of tidal action, the results revealed that tidal actionhas little influence on the water quality in the upstream of Yagang; but in Xicen and Shimen, there ex-fists obvious influence of tidal action on the water body, organic matter is caracterized by sources frompollution by human activities. The study also indicated that principles and methods organic geochemistry could be applied to the study on hydrological features and water quality in the river system.