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Water 2015, 7(6), 2591-2611; doi:10.3390/w7062591

Spatio-Temporal Variations and Source Apportionment of Water Pollution in Danjiangkou Reservoir Basin, Central China

1
,
1,2,* and 3,4
1
State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
2
Hubei Collaborative Innovation Center for Water Resources Security, Wuhan 430072, China
3
China Institute of Water Resources and Hydropower Research, Beijing 100038, China
4
Research Center on Flood and Drought Disaster Reduction, Ministry of Water Resources, Beijing 100038, China
*
Author to whom correspondence should be addressed.
Academic Editor: Miklas Scholz
Received: 9 March 2015 / Revised: 10 May 2015 / Accepted: 20 May 2015 / Published: 27 May 2015
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Abstract

Understanding the spatio-temporal variation and the potential source of water pollution could greatly improve our knowledge of human impacts on the environment. In this work, data of 11 water quality indices were collected during 2012–2014 at 10 monitoring sites in the mainstream and major tributaries of the Danjiangkou Reservoir Basin, Central China. The fuzzy comprehensive assessment (FCA), the cluster analysis (CA) and the discriminant analysis (DA) were used to assess the water pollution status and analyze its spatio-temporal variation. Ten sites were classified by the high pollution (HP) region and the low pollution (LP) region, while 12 months were divided into the wet season and the dry season. It was found that the HP region was mainly in the small tributaries with small drainage areas and low average annual discharges, and it was also found that most of these rivers went through urban areas with industrial and domestic sewages input into the water body. Principal component analysis/factor analysis (PCA/FA) was applied to reveal potential pollution sources, whereas absolute principal component score-multiple linear regression (APCS-MLR) was used to identify their contributions to each water quality variable. The study area was found as being generally affected by industrial and domestic sewage. Furthermore, the HP region was polluted by chemical industries, and the LP region was influenced by agricultural and livestock sewage. View Full-Text
Keywords: water pollution; spatio-temporal variation; source apportionment; fuzzy comprehensive assessment; multivariate statistical analysis water pollution; spatio-temporal variation; source apportionment; fuzzy comprehensive assessment; multivariate statistical analysis
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Chen, P.; Li, L.; Zhang, H. Spatio-Temporal Variations and Source Apportionment of Water Pollution in Danjiangkou Reservoir Basin, Central China. Water 2015, 7, 2591-2611.

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