Studies on Seasonal Variation of Water Quality of Baixi Reservoir in Zhejiang Province and Ecology Protection

[Objective] The aim of the study was to seek seasonal variation of water quality of Baixi Reservoir and ecology management countermeasure.[Method] By collecting the water samples in front of sluice and center of reservoir and determinating the water quality in laboratory,the comparative study of water quality was made.[Result] Based on the monthly monitoring data in 2007 and 2008,the study showed that water quality of Baixi Reservoir had significant seasonal variation characteristics,including water temperature,pH value,fluoride concentration,dissolved oxygen concentration and quantity of Escherichia coli.[Conclusion] Because of taking ecology strategies,the water quality of reservoir in 2008 was better than that of reservoir in 2007.