| A decade of variation of COD in the Changjiang River （Yangtze River） and its variation trend analysis |
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| 作者姓名： | WANG Fushun WANG Yuchun ZHANG Jing |
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| 作者单位： | [1]Institute of Applied Radiation, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 201800, China [2]State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062 China [3]Department of Wetter Environment, China Institute of Water Resources and Hydroelectric Power Research （IWHR）, Beijing 100038,China |
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| 摘 要： | The average annual value of COD (chemical oxygen demand) fluxes of the Changjiang River (Yangtze River) and its main tributaries in the past decade (i.e., 1991–2000), has been evaluated. Based on the data from the Datong Hydrological Station (DHS), it was found that the Dongting Lake drainage basin contributed the greatest water discharge (35.8%) and COD flux (48.3%) among the main tributary drainage basins, followed by the Poyang Lake drainage basin with the contributions of 15.4% and 19.3%,respectively. By the end of the year of 2000, COD flux in the Changjiang River rose by almost 45% relative to that in the year of 1991, reaching about 1941000 ton/a at DHS. Statistical analysis revealed that industrial wastewater discharge, as well as COD in it, was found decreasing in the same period, due to the gradual reinforcement of environmental management. Moreover, correlation analysis indicated that non-point pollution from agriculture and increasing discharge of domestic sewages caused by rapid growth of population along the Changjiang River drainage valley should be responsible for the high COD. Furthermore, with the current trend of population growth and agricultural development in this basin, water quality of the Changjiang River, in terms of COD level, is going to deteriorate in the near future. Thus, the rational applications of fertilizers and pesticides in agriculture and the proper treatment of domestic sewages before they are discharged would be the most concerned controlling parameters.
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| 关 键 词： | 长江 排水盆地 水质量 种群 |
| 收稿时间： | 11 August 2006 |
| 修稿时间： | 2006-08-11 |
A decade of variation of COD in the Changjiang River (Yangtze River) and its variation trend analysis |
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| WANG Fushun WANG Yuchun ZHANG Jing.A decade of variation of COD in the Changjiang River (Yangtze River) and its variation trend analysis[J].Chinese Journal of Geochemistry,2007,26(4):366-373. |
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| Authors: | Wang Fushun Wang Yuchun Zhang Jing |
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| Abstract: | The average annual value of COD (chemical oxygen demand) fluxes of the Changjiang River (Yangtze River) and its main tributaries
in the past decade (i.e., 1991–2000), has been evaluated. Based on the data from the Datong Hydrological Station (DHS), it
was found that the Dongting Lake drainage basin contributed the greatest water discharge (35.8%) and COD flux (48.3%) among
the main tributary drainage basins, followed by the Poyang Lake drainage basin with the contributions of 15.4% and 19.3%,
respectively. By the end of the year of 2000, COD flux in the Changjiang River rose by almost 45% relative to that in the
year of 1991, reaching about 1941000 ton/a at DHS. Statistical analysis revealed that industrial wastewater discharge, as
well as COD in it, was found decreasing in the same period, due to the gradual reinforcement of environmental management.
Moreover, correlation analysis indicated that non-point pollution from agriculture and increasing discharge of domestic sewages
caused by rapid growth of population along the Changjiang River drainage valley should be responsible for the high COD. Furthermore,
with the current trend of population growth and agricultural development in this basin, water quality of the Changjiang River,
in terms of COD level, is going to deteriorate in the near future. Thus, the rational applications of fertilizers and pesticides
in agriculture and the proper treatment of domestic sewages before they are discharged would be the most concerned controlling
parameters. |
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| Keywords: | COD flux Changjiang River drainage basin water quality population |
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