Assessment of Monthly Variation of Two Water Bodies in Erbil Governorate.
Keywords:
Principal component analysis, Erbil wastewater channel, Greater Zab River, Water pollutionAbstract
The present study was conducted on Erbil wastewater channel and Greater Zab River. Seven sites were selected, three of them from polluted channel and four from the Greater Zab River. Water samples for chemical and biological analysis were collected monthly from May 2006 to April 2007. Factor analysis (Principal component analysis) revealed six significant main components which represented by more than 64.5% of the total variance, in which explained by 26.13%, 15.73%, 11.92%, 8.33%, 7.36% and 5.85% respectively, it revealed that sewagewater from Erbil city and agricultural activities a round polluted channel were the major source of pollutant in the channel, whereas, for the Greater Zab river the seven PCs, of the total variance, were 23%, 14.63%, 10%, 8.96%, 7.73%, 6.55%, and 6.24% respectively, with 77.14% of a cumulative variance, in which Greater Zab river was polluted by effluent of polluted channel, agricultural activities and mineral erosion through rainfall.
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