NDLI: Spatial and temporal analysis of water quality trends in the Min River Basin

Content Provider	IEEE Xplore Digital Library
Author	Zhang, A.Y. Qiao Wang Chuanqing Wu Wandong Ma Miao Zhou Kai Cao
Copyright Year	2012
Description	Author affiliation: Satellite Environment Center, Ministry of Environmental Protection, Beijing, China (Zhang, A.Y.; Qiao Wang; Chuanqing Wu; Wandong Ma) \|\| Sichuan Environmental Monitoring Center, Chengdu, Sichuan, China (Miao Zhou) \|\| Department of Geography, University of California, Santa Barbara, U.S.A (Kai Cao)
Abstract	In this paper, spatial and temporal pattern analysis was performed to obtain better understanding of the water quality in the Min River Basin. The water quality data of 34 sites for five indicators, Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD5), Total Nitrogen (TN), Total Phosphorus (TP), and Dissolved Oxygen (DO) between 2001 and 2010 were analyzed. The spatial trends of water quality for the 2000s were presented. An interpolation approach based on the distance along river network was used to reveal the spatial variation of water quality in year 2010. A non-parametric seasonal Mann-Kendall's test was employed to determine the significance of temporal trends for each parameter of each site. Basically, the water quality of the Min River basin is good and most of the segments can satisfy the national environmental standards of Class III. Moreover, certain spatial and temporal patterns can be discovered through the analysis. The best water quality is in the Dadu River, the Qingyi River, and the upper parts of the Min River. The water quality of the Fu River is the worst in the basin. The middle parts of the Min River are worse than the lower parts and better than the Fu River. From temporal perspective, COD showed significant upward trend, whereas BOD5 showed significant downward trend. TN and TP showed increasing trends in a similar spatial manner, which exhibits the signs of degradation in water quality. Particularly, the concentration of TN exhibited significant upward trend. Nevertheless, DO showed some upward trends. The reasons of the spatial-temporal characteristics were also discussed and some water management strategies were recommended.
Starting Page	1
Ending Page	7
File Size	3577147
Page Count	7
File Format	PDF
ISBN	9781467312837
e-ISBN	9781467312820
DOI	10.1109/GIWRM.2012.6349581
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	GIS Interpolation Oxygen Seasonal Mann-Kendall Water quality Market research Water pollution Rivers Monitoring Standards Spatial statistics
Content Type	Text
Resource Type	Article

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