RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2005, Vol. 14 >> Issue (4): 481-485.

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CURRENT WATER ENVIRONMENTAL STATUS AND DOMINANTFACTOR ANALYSIS IN HONGHU LAKE

DU Yun(1),CHEN Ping(1), Kieko SATO(2), Hajime AOE(2), HE Bao-yin(1)   

  • Received:1900-01-01 Revised:1900-01-01 Online:2005-07-20
  • Contact: DU Yun

Abstract: This paper analyzed water body's chemical property of Honghu Lake on the basis of 20 water samples collected in summer, 2003. In terms of water classification, the water was third in summer, but the water status was worse in other seasons. Physically and chemically, the water body was favourable for the growth and reproduction of aquatic lives. According to the results by fuzzy mathematics, it is demonstrated that water status in Honghu Lake is ranked to the third classification, which suggests that there is a decreasing trend of water quality due to excessive exploration to aquicolous resources. In application of principal components analysis, we acquired three leading control elements. The water quality is mainly under the control of nitride and biological activity, then, suspender, ionic attribute, and the last factor is phosphide. Although total phospher is a key eutrophication factor of the majority of lakes, it is not the dominating control factor for Honghu Lake.

Key words: Honghu Lake, water quality, fuzzy mathematics, principal components analysis

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