Characteristics of Dissolved Organic Matter and Its Relationship with Water Quality along the Downstream of the Kaidu River in China

The variability in the quality of water that runs along course a river, flowing out mountain pass, through an agricultural oasis and into lake, has been key topic research recent years. In this study, characteristics dissolved organic matter (DOM) river flow, its relationship with quality, were analyzed using Canadian index (CWQI), parallel factor (PARAFAC) self-organizing map (SOM). study results include: (1) conclusion field sampling lower reaches Kaidu River laboratory measurements parameters, CWQI to determine River, ranging between 59.58 93.47. generally ranges moderate good, can meet use requirements Class II function standards. (2) DOM composition predominantly contained three fluorescence components, while indices body varied less different sections. Based on SOM training model, intensity C1 component was larger among followed by C2 component, smallest C3, which dominated humic-like substances, high authigenic origin humification degree. (3) components correlated it found C1, C3 negative significantly SO42- Total-dissolved solids (TDS) concentrations; FI, HIX BIX showed strong positive correlations SAL Cu oxygen (DO). This provides scientific basis for surface monitoring pollution management River.