Investigation of the Algal Population Feature in Source Water of Xiamen

Water sample from source water of Xiamen during 2012~2013were collected and observed in order to investigate the distribution of algae in the source water.The investigation results indicated that the quantity of algae in raw water during the investigation time are not large but in spring and winter,the most quantity of algae was 3.76× 105/L found in Jingdong source water in Feb.,2013.The algae was mainly consisted of chlorophyta,Diatoms and Cryptophyta.The number of algae in Beixi source water and Jiangdong source water is:Cyanophyta were 7species(genus)and 5species(genus), Chlorophyta were 15species(genus)and 18species(genus),diatoms were 9species(genus)and 7species(genus),Pyrrophyta were 1species(genus)and 0species(genus),Euglenophyta was 4species(genus)and 4species(genus),Cryptophyta is 3species(genus)and 5species(genus),Chrysophyta is 1species(genus)and 2species(genus).According to Margalef diversity index and the identification standard of algae indicator,the two source water were oligo-meso trophic water body.The study could provide reference for effective understanding and removal of taste and odor in waterworks.