关键词: 泥沙淤积, 总磷, 总氮, 氨氮, 三峡水库

Abstract: After impoundment of the Three Gorges Reservoir (TGR), the sediments were heavily deposited in the wide valley section and the curved section of the reservoir area, and the concentration of nitrogen and phosphorus pollutants also changed obviously. In order to understand the influence of sedimentation on nitrogen and phosphorus pollutants in TGR, based on in-situ measurement and data collection, we discussed the correlation between the concentration of sediment and total phosphorus (TP), total nitrogen (TN), ammonia nitrogen (NH3-N), and summarized the spatial and temporal distribution characteristics of TP, NH3-N and sedimentation. The results showed that the sediment had large adsorption to TP, and the TP concentration was continuously decreasing with the increase of sedimentation; the sediment also had adsorption to NH3-N, and the concentration of NH3-N decreased with the increase of sedimentation, but the variation trend was much smaller than that of the TP. The research results can lay a theoretical foundation for the study on the influence of sediment on environmental factors such as river eutrophication.

Key words: sediment deposition, total phosphorus, total nitrogen, ammonia nitrogen, Three Gorges Reservoir