中文摘要：

以飞来峡水库为研究对象,于2015年6月（丰水期）和12月（枯水期）对库区内9个采样点进行水样采集。通过测定各形态氮、磷浓度,结合Spearman相关性检验结果和氮磷比,分析水库氮、磷营养盐分布特征、结构以及来源。结果表明：（1）硝酸盐氮是氮营养盐的主要存在形态,磷营养盐的主要存在形态为颗粒磷和溶解态磷;（2）总氮、总磷浓度总体表现分别为丰水期〈枯水期和丰水期〉枯水期,氮浓度受生活污染影响较大,磷浓度变化具备面源污染特征;（3）氮、磷元素在丰水期具有同源性,枯水期输入源不完全一致;（4）对比3条主要入库河流（北江干流及滃江、连江等支流）的入库通量,枯水期北江总氮通量最大,为1 036.0 g/s,丰水期滃江总氮通量最大,为1 128.4 g/s,丰、枯水期北江总磷通量均最大,分别为85.4和70.3 g/s;（5）DIN/TP介于4.0~47.1,水库属于磷营养限制类型。

英文摘要：

Samples collected from 9 sites in the Feilaixia Reservoir in June and December of 2015 are used to analyze the forms and distribution of nitrogen and phosphorus by measuring their concentrations and combining Spearman correlation test results and N/P ratio.The results show that：（1） NO_3~--N,PP and DP are the main forms.（2） TN concentrations during wet season are lower than those during dry season,while TP concentrations are higher during the wet season.The nitrogen concentration is mainly influenced by domestic sewage and phosphorus is influenced by non-point source pollution.（3） Nitrogen and phosphorus may be originated from the same sources during wet season.（4） The TN flux in wet season in the Wengjiang River is 1 128.4 g/s,which is the highest among the three main rivers in the Feilaixia reservoir.The TN flux of the Beijiang River is 1 036.0 g/s,which is the highest in dry season.TP fluxes of the Beijiang River are the highest,with 85.4 and 70.3 g/s in wet and dry season,respectively.（5） The ratios of DIN/TP range from 4.0 to 47.1,suggesting that the Feilaixia reservoir is in the state of phosphorus limitation.