title: Environmental heterogeneity analysis, assessment of trophic state and source identification in Chaohu Lake, China.
abstract: BACKGROUND
  Environmental heterogeneous methods were used for analysing data sets of trophic state with 11 parameters measured at 12 different sites at Chaohu Lake for the period 2004 to 2006. The aim of this research was to determine spatial/temporal variations in water quality, to assess trophic state and to identify pollution sources. Protective measures and schemes were proposed to improve water quality in the lake.
  
  
  CONCLUSIONS
  Hierarchical cluster analysis (CA) grouped the 12 sampling sites into two clusters (Eastern Chaohu Lake and Western Chaohu Lake). Temporal CA classified the 12 months into four periods (March-May; June-August; September-November; January, February and December) with a distinct regular seasonal cycle in Eastern Chaohu Lake and four periods (January-April and December; May, July and November; June, September and October; August) with an irregular seasonal cycle in Western Chaohu Lake. Trophic state index analysis showed that Eastern Chaohu Lake was in mesotrophic levels, while Western Chaohu Lake was in eutrophic and hypereutrophic levels. Based on pollutant source statistics data, the dominant pollution sources were identified as domestic sewage and non-point pollution in Eastern Chaohu Lake. Domestic sewage, industrial and non-point sources were contributed to eutrophication in Western Chaohu Lake.
authors: School of Environmental & Safety Engineering, Chanzhou University, 1 Gehu Rod, Wujin District, Changzhou, Jiangsu 213164, China.
authors: Huibin
authors: H
authors: Yu
authors: Beidou
authors: B
authors: Xi
authors: Jinyuan
authors: J
authors: Jiang
authors: Marie J
authors: MJ
authors: Heaphy
authors: Hailong
authors: H
authors: Wang
authors: Dinglong
authors: D
authors: Li
mesh_terms: D002681:China; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry*; D012621:Seasons; D012722:Sewage / Q000737:chemistry; D014873:Water Pollutants / Q000032:analysis*; D014876:Water Pollution / Q000032:analysis* / Q000517:prevention & control
chemical_list: D012722:Sewage; D014873:Water Pollutants