Distribution and transportation of nitrogen in Miyun reservoir waters

查看全文 作　　者：LIANG Xiujuan, XIAO Changlai, YANG Tianxing, WANG Jing & LIU Xiaoduan College of Environment and Resources, Jilin University, Changchun 130026, China;College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China;National Research Center for Geoanalysis, Beijing 100037, China 出　　处：《Science China Earth Sciences》索引2005年第48卷第z2期,共11页 摘　　要：The Miyun reservoir is an important water supply for Beijing city. The distribution laws of nitrogen in the Miyun reservoir waters and the transportation factors have been systematically analyzed in space and time by using water monitoring data sampled in the high-water and low-flow periods in 2001 and 2002. The nitrogen in east and west reservoir waters is distributed differently in space. It shows the change characteristics in high-water and low-flow periods and is affected by the source of nitrogen, runoff conditions, hydrodynamic conditions, precipitation and the control of bed mud, of which the source of nitrogen controls the change of concentration of nitrogen, the peripheral runoff controls the distribution law of nitrogen, bed mud controls the vertical distribution of nitrogen, and the contents of nitrogen and its change in the surrounding environment directly cause the change of concentration of total nitrogen in the waters. The improvement and protection of the waters in the Miyun reservoir basically rests with the amelioration of the peripheral environment. 关 键 词：Miyun reservoir, total nitrogen, SPACE-TIME distribution, TRANSPORTATION laws.