The components and structural characteristics of dissolved organic matter (DOM) in the overlying water were studied using various spectroscopy in Beiyun River. The relationship between the DOM composition and water quality was discussed. The result declared that the overall pollution of the Beiyun River was serious, and that the DOM content of the overlying water was between 9.60 and 28.70 mg/L. The DOM was mainly composed of humic-like substances (72.83%), proteins (9.49%), and microbial metabolites (17.68%). Furthermore, the structure and composition of DOM affected the nutrition level of river and reflected the water quality to some extent. Especially, the humification degree (SUVA₂₅₄) of DOM can indirectly reflect the content of different types of nitrogen in the overlying water. Thus, some preliminary advice has been proposed to improve water quality by analyzing the content, composition and structural characteristics of DOM in the overlying water. These results offer novel ideas for the management of the Beiyun River.

利用多种光谱技术研究了北云河上覆水中溶解性有机物的组成和结构特征。讨论了DOM组成与水质之间的关系。结果表明，北云河的总体污染是严重的，上覆水中的DOM含量在9.60至28.70 mg / L之间。DOM主要由类腐殖质（72.83％），蛋白质（9.49％）和微生物代谢产物（17.68％）组成。此外，DOM的结构和组成影响河流的营养水平，并在一定程度上反映了水质。尤其是谦卑度（SUVA ₂₅₄DOM可以间接反映上覆水中不同类型氮的含量。因此，已经提出了一些初步建议，以通过分析上覆水中DOM的含量，组成和结构特性来改善水质。这些结果为北云河的治理提供了新颖的思路。