Spatial and temporal distribution of main aquatic environment factors in Miyun Reservoir, Beijing since 1990s

被引：5
|
作者：
Zeng Q. [1 ,2 ]
Qin L. [1 ,2 ]
Cheng P. [1 ,2 ]
Li X. [1 ]
Jia D. [3 ]
Pan K. [3 ]
机构：
[1] State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing
[2] University of Chinese Academy of Sciences, Beijing
[3] Miyun Reservoir Administration of Beijing, Beijing
来源：
Li, Xuyong (xyli@rcees.ac.cn) | 1600年 / Science Press卷 / 28期
关键词：
APCS-MLR; Cluster analysis; Factor analysis; Miyun Reservoir; Seasonal Kendall analysis;
D O I：
10.18307/2016.0606
中图分类号：
学科分类号：
摘要：
Monthly monitoring data of totally 12 monitoring sites in Miyun Reservoir from 1990 to 2011 were collected. Cluster analysis was used to analyze the spatial distribution of hydrogeochemical characteristics of these sites. Factor analysis was used to identify the main factors affecting water quality and evaluate the comprehensive water quality of each monitoring site. The multivariate linear regression of the absolute principal component scores (APCS-MLR) was employed to quantify the contribution rate of each factor on water quality indicators in both flood and non-flood seasons. The results indicated that: water quality was mainly affected by agricultural nutrients, biochemical factor and organics in flood season. While in non-flood season it was mainly affected by farming and husbandry emissions, human activities and biochemical factors. Factor score evaluation showed that the comprehensive water quality of Xinzhuangqiao, Neihu and Kudong were worse and that of Chaohe, Kuxi and Baihe were better in flood season. In non-flood season, the comprehensive water quality of Xinzhuangqiao, Shifoqiao and Daguanqiao were worse and that of Kudong, Taoli and Henghe were better. The interannual trends of main water quality pollutants were different, but all leveled off eventually. Water quality changed less in the reservoir compared with water quality coming from Chaohe and Baihe. Water quality of both reservoir and watershed was getting better. Changing trend of water quality indicators were basically the same before and after flow control test except for TN and TP in Baihe. It indicated that the main factor causing water quality changes was not flow but pollution source changes. © 2016 by Journal of Lake Sciences.
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页码：1204 / 1216
页数：12
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