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Frontiers of Earth Science

ISSN 2095-0195

ISSN 2095-0209(Online)

CN 11-5982/P

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2018 Impact Factor: 1.205

Front. Earth Sci.    2015, Vol. 9 Issue (3) : 463-472    https://doi.org/10.1007/s11707-015-0498-3
RESEARCH ARTICLE
Analysis of the temporal and spatial distribution of water quality in China’s major river basins, and trends between 2005 and 2010
Jinjian LI1, Xiaojie MENG1,2, Yan ZHANG1(), Juan LI1, Linlin XIA1, Hongmei ZHENG1
1. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China
2. Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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Abstract

In this study, based on environmental quality monitoring data on 22 pollutants from 490 control sections, we analyzed the spatial distribution and temporal changes of water quality in ten Chinese river basins (watersheds) to reveal the trends from 2005 to 2010. We used a comprehensive water pollution index (WPI) and the proportions of this index accounted for by the three major pollutants to analyze how economic development has influenced water quality. Higher values of the index represent more serious pollution. We found that WPI was much higher for the Hai River Basin (1.83 to 5.60 times the averages in other regions). In the Yangtze River Basin, WPI increased from upstream to downstream. The indices of some provinces toward the middle of a basin, such as Hebei Province in the Hai River Basin, Shanxi Province in the Yellow River Basin, and Anhui Province in the Huai River Basin, were higher than those of upstream and downstream provinces. In the Songhua, Liao, and Southeast river basins, WPI decreased during the study period: in 2010, it decreased by 33.9%, 44.3%, and 67.2%, respectively, compared with the 2005 value. In the Pearl River, Southwest, and Inland river basins, WPI increased by 23.1%, 47.7%, and 38.5% in 2010, compared with 2005. A comparison of WPI with the GDP of each province showed that the water pollution generated by economic development was lightest in northwestern, southwestern, and northeastern China, and highest in central and eastern China, and that the water environment in some coastal regions were improving. However, some provinces (e.g., Shanxi Province) were seriously polluted.

Keywords water environment      temporal changes      spatial distribution      comprehensive water pollution index      China      river basins     
Corresponding Author(s): Yan ZHANG   
Just Accepted Date: 06 March 2015   Online First Date: 28 April 2015    Issue Date: 20 July 2015
 Cite this article:   
Jinjian LI,Xiaojie MENG,Yan ZHANG, et al. Analysis of the temporal and spatial distribution of water quality in China’s major river basins, and trends between 2005 and 2010[J]. Front. Earth Sci., 2015, 9(3): 463-472.
 URL:  
https://academic.hep.com.cn/fesci/EN/10.1007/s11707-015-0498-3
https://academic.hep.com.cn/fesci/EN/Y2015/V9/I3/463
Fig.1  Changes in the comprehensive water pollution index value (WPI) in the ten river basins from 2005 to 2010. (The data for the Southwest River Basin and Southeast River Basin were not available for 2005 and 2006.) Each number that represents a province, from left to right of the x-axis, is in the order of from upstream to downstream regions of a river basin. Some provinces occur in more than one basin because of the topographic characteristics of the province. Province names: 1. Yunnan, 2. Gansu, 3. Sichuan, 4. Shaanxi, 5. Chongqing, 6. Guizhou, 7. Henan, 8. Hubei, 9. Hunan, 10. Anhui, 11. Jiangxi, 12. Jiangsu, 13. Shanghai, 14. Shanxi, 15. Hebei, 16. Shandong, 17. Beijing, 18. Tianjin, 19. Qinghai, 20. Ningxia, 21. Inner Mongolia, 22. Heilongjiang, 23. Jilin, 24. Liaoning, 25. Guangxi, 26. Hainan, 27. Guangdong, 28. Xinjiang, 29. Fujian, 30. Zhejiang, 31. Tibet.
BasinYearContributions of the three major pollutants/%
Yellow River Basin200519.56 (Total N)17.32 (NH4-N)8.04 (BOD5)
201035.05 (Total N)15.01 (NH4-N)7.04 (BOD5)
Hai River Basin200518.46 (NH4-N)13.33 (Total N)11.38 (BOD5)
201035.10 (Total N)16.46 (NH4-N)8.74 (Total P)
Pearl River Basin200518.16 (Total N)7.93 (DO)7.59 (Se)
201026.61 (Total N)10.25 (NH4-N)9.39 (DO)
Liao River Basin200514.58 (NH4-N)13.71 (Phenolics)12.69 (BOD5)
201019.37 (NH4-N)9.58 (CODCr)9.52 (BOD5)
Southeast River Basin200517.28 (CODMn)14.96 (Oils)14.83 (DO)
201025.95 (Total N)10.05 (Oils)8.58 (CODCr)
Yangtze River Basin200521.27 (Hg)15.73 (Total N)8.75 (Total P)
201025.97 (Total N)9.55 (Total P)7.33 (CODCr)
Huai River Basin200519.44 (Total N)15.36 (NH4-N)9.24 (CODCr)
201024.66 (Total N)9.92 (NH4-N)9.89 (CODCr)
Songhua River Basin200512.70 (Total N)11.74 (CODMn)10.97 (CODCr)
201018.06 (Total N)12.50 (CODMn)11.55 (CODCr)
Southwest River Basin200513.91 (Pb)12.24 (pH)11.17 (CODCr)
201010.82 (Pb)9.03 (DO)8.41 (CODCr)
Inland River Basin200515.76 (pH)13.35 (BOD5)12.85 (NH4-N)
201021.04 (Total N)15.67 (Oils)7.83 (CODCr)
Tab.1  The contributions of the three major pollutants to the comprehensive water pollution index in ten Chinese river basins at the start (2005) and end (2010) of the study period. Major pollution factors shaded in grey did not change between 2005 and 2010 for a given basin: dark grey means that none of the three factors changed, and light grey means that one or two of the three factors did not change.
Fig.2  The classification of the ten Chinese river basins in 2010 based on the median parameter values. Solid lines: WPI, comprehensive water pollution index; (a median of 8.1); GDP, gross domestic product (a median of 1,020×109 CNY). The dashed lines represent the position of the enlarged area shown at the right side of the figure. Province names: 1. Yunnan, 2. Gansu, 3. Sichuan, 4. Shaanxi, 5. Chongqing, 6. Guizhou, 7. Henan, 8. Hubei, 9. Hunan, 10. Anhui, 11. Jiangxi, 12. Jiangsu, 13. Shanghai, 14. Shanxi, 15. Hebei, 16. Shandong, 17. Beijing, 18. Tianjin, 19. Qinghai, 20. Ningxia, 21. Inner Mongolia, 22. Heilongjiang, 23. Jilin, 24. Liaoning, 25. Guangxi, 26. Hainan, 27. Guangdong, 28. Xinjiang, 29. Fujian, 30. Zhejiang, 31. Tibet.
River BasinYearpRiver BasinYearp
Yangtze River Basin20050.264Yellow River Basin20050.000*
20060.11220060.000*
20070.07020070.000*
20080.39020080.021*
20090.51220090.024*
20100.96120100.029*
Pearl River Basin20050.029*Songhua River Basin20050.549
20060.009*20060.413
20070.046*20070.290
20080.38320080.664
20090.19220090.581
20100.92820100.475
Huai River Basin20050.798Hai River Basin20050.029*
20060.80520060.124
20070.84720070.117
20080.90220080.049*
20090.82520090.862
20100.81920100.532
Liao River Basin20050.517Southwest River Basin2005
20060.4792006
20070.35120070.796
20080.77020080.635
20090.99420090.328
20100.27120100.326
Southeast River Basin2005Inland River Basin20050.067
200620060.128
20070.32320070.090
20080.13520080.914
20090.83420090.920
20100.68620100.672
  A3 Significance of the differences in WPI for each province in the ten river basins studied from 2005 to 2010. Values labeled with an * differ significantly among the provinces within a basin (p<0.05)
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