THE SPATIO-TEMPORAL DISTRIBUTION OF ALGAL BIOMASS IN TAIHU LAKE AND ITS IMPACT FACTORS
The water pollution of Taihu Lake is characterized by the severity of eutrophication and high frequency of algae bloom. Associated with the National Key Basic Research Program(973) “Studies on the process of large and medium shallow lake eutrophication and the mechanism of the algae bloom, Chlorophyll a (Chl-a) and Index of Nutrients had been monthly investigated at 9 sites in Taihu Lake from January, 2009 to December, 2010. Hydrological and meteorological factors had been continuously investigated as well. The results showed that: In terms of temporal, comparing 2009 and 2010, average monthly concentration of Chl-a presented consistent trend, and in the same year showed significant seasonal variations. The peak was in summer, and the lowest was in winter and early spring; In terms of spatial, Chl-a concentrations were higher in the Meiliang bay and Gonghu bay of the northern Taihu Lake, while Chl-a concentrations were lower in the eastern Taihu Lake. Moreover, the investigation indicated that algae bloom appeared at different times between 2009 and 2010, which may be related to the difference of air temperature and time period of annual rainy season and rainfall. Frequent occurrence of algae bloom in summer and autumn, to a great extent, chl-a concentration of spatio-temporal variation in the whole lake was driven by water temperature, water level, rainfall, wind direction, wind speed and other hydrological and meteorological factors.
YE Rui QIAN Xin XIONG Wen
State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing, 210046, China
国际会议
武汉
英文
11
2011-04-05（万方平台首次上网日期，不代表论文的发表时间）