湖泊科学Issue(3)：371-377,7.
引水等综合整治后杭州西湖氮、磷营养盐时空变化（1985~2013年）
Spatial and temporal distributions and variations of nutrients in the West Lake, Hang-zhou, after the implementation of integrated water management program (1985 2013)
摘要
Abstract
Through the integrated management including water diversion, the total phosphorus ( TP) concentrations were decreased by 58% and 78%, the total nitrogen (TN) decreased by 16. 7% and 7. 7%, and transparency raised by 100% to 200%, respec-tively, in the outer West Lake and the inner West Lake. Eutrophication status was greatly reduced in the lake. Compared to the sit-uation before the implementation of the program in 1986, due to the huge differences in inflow, diversion and drainage patterns, the characteristics of TP concentration variations within the year and their driving factors have great differences in different regions of the lake. In the upper lake region located in the west of Yanggongdi, TP concentration was low because of the supplement of high quality diverted water, and the concentrations increased in certain periods of time by the influences of rainfall-runoff non-point sources. The lake region between Yanggongdi and Sudi, TP concentration was the lowest and its variation was relatively stable, due to the large quantity of supplemented high-quality diverted water and the fastest water exchange. In outer lake area located in the east of Sudi, water exchange was slow, and TP concentrations reached the peak in summer because of the sediments release. Due to large quantity of water diversion and being lack of denitrification process, the variation of TN concentrations in the West Lake were the same as that in the intake river, Qiantang River, and the concentrations appeared to fluctuate in the same period of time for the rainfall-runoff non-point source. Based on the analysis of TP mass balance model, the spatial variation of water quality was primarily affected by the times of water exchange, and the pollutant load per volume of water secondary.关键词
西湖/总磷/总氮/时空分布/影响因子Key words
West Lake/total phosphorus/total nitrogen/spatial and temporal distributions/impact factors引用本文复制引用
尤爱菊,吴芝瑛,韩曾萃,杨俊,滑磊..引水等综合整治后杭州西湖氮、磷营养盐时空变化（1985~2013年）[J].湖泊科学,2015,(3):371-377,7.基金项目
国家水体污染控制与治理科技重大专项(2012ZX07101-007-005)资助 （2012ZX07101-007-005）
