高水位运行期间密云水库总氮含量变化趋势及原因分析

Analysis of variation trend and cause of total nitrogen content in Miyun Reservoir during high water level operation

近年来密云水库库区水质处于相对良好状态,但从湖库营养状态来看,库区水质处于中营养偏富状态。本研究对密云水库高水位运行期间总氮含量变化趋势进行分析,得到高水位运行期间,密云水库总氮含量总体呈上升趋势,主要原因是入库河流输入总氮量增加,为管理部门做好饮用水源地保护工作提供决策支持。

In recent years, the water quality of Miyun Reservoir is in a relatively good state, but from the point of view of the state of lake and reservoir nutrition, the water quality of Miyun Reservoir is in a moderately rich state. In this study, the variation trend of total nitrogen content was analyzed to find the causes,and relevant suggestions were put forward to provide decision-making support for the management department to do a good job in the protection of drinking water sources. Through the analysis, it is concluded that during the operation of high water level, the total nitrogen content of Miyun Reservoir generally shows an upward trend, which is mainly due to the increase of total nitrogen input into the inflow river.