EUTROPHICATION AND POLLUTION INVESTIGATION OF THE ARTIKICIAL LAKES IN SOUTH CHINA NORMAL UNIVERDITY IN SHIPAI

The floating algae in artificial pools in South China Normal University were carefully investigated and analyzed. The research involved solid contamination and human activities. It turned out that there were altogether 37genus floating algae which could be assorted to 7 phylum. Among all the algae, Chlorophyta (13 genus, 35 species) accounted for 35.14% of the total genus, which were mainly Chlorococcales (Scenedesmus, Ankistyodesmus); Cyanophyta (10 genus 15 species) accounted for 27.03% of the total genus, which were mainly Oscillatoria and Spirulina; Bacillariophyta (6 genus) and Xanthophyta (4 genus) accounted for 16.22% and 10.81% respectively. Chlorella and blue-green algae were two dominant species in the pools.The two artificial pools were all Chlorella-blue-green algae-type lakes according to the composition of the floating plants. The margalef indicated that the whole pools were in serious eutrophication status. Continuous eutrophication could be attributed to the poor self-clean ability of pool water caused by improper design earlier and overnutrition because of the degradation of falling leaves from surrounding plants. Several measures could be adopted to lower or change the water contamination completely, including anti-leakage, renovation, water recycle regularly, putting up artificial wetlands in the shallow water and locating artificial floating islands in the pools, etc.