RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2004, Vol. 13 >> Issue (2): 124-127.

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WATER QUALITY IN THE THREE GORGES RESERVOIR BEFORE IMPOUNDMENT

DAI Run-quan,ZANG Xiao-ping,QIU Guang-sheng   

  • Received:1900-01-01 Revised:1900-01-01 Online:2004-03-20
  • Contact: DAI Run-quan

Abstract: Single factor method was used to assess the water quality status according to the data of the Three Gorges Reservoir from 1996 to 2001. The result indicates that the water quality of the Reservoir is in good condition. The averages of all parameters assessed meet respectively Class II water quality criterion. CODMn、TPb and NH3—N are primary polluting factors in this area. The water quality in flood season is inferior to that in nonflood seasons. The PWQTrend, a professional analysis software on water quality change trend，was used to analyze the water quality trend of the Reservoir，and the result shows that the change on the content level of parameters and the pollutant transport rate is mainly unremarkable indicating that the water quality of the Three Gorges Reservoir maintains stable in general during the past 6 years.

Key words: Three Gorges Reservoir, water quality evaluation, trend analysis

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