The spatial and temporal variation of algal blooms and relationships between chlorophyll- a content and TN and TP concentrations in Lake Chaohu, China
Based on the data of NOAA/AVHRR and the monthly monitoring data in 2002 -2007,the spatial and temporal variation of algal blooms in Lake Chaohu was analyzed.Meanwhile,the relationships between the chlorophyl ( Chl - a) contentin algae and the total nitrogen (TN) and total phosphorus (TP) concentrations in water bodies of Lake Chaohu were studied.The results showed that the relationships between Chl - a content and TN and TP concentrations were quite different in the monitoring zones.The algal blooms occurred in the western area of the lake,where Chl - a content was above 20 μg/L all the year,and achieved the peak value 77.87 μg/L in August.No algal blooms occurred in the eastern area of the lake,with Chl -a content below 5.5 μg/L all the year.In the eastern area of the lake,Chl -a content had positive correlations with TN and TP concentrations,and increased very fast when the TP concentration was above 0.15 mg/L.The Chl -a content increased with increasing TN and TP concentrations when they were below 5.8 and 0.2 mg/L in the western area of the lake,but decreased with increasing TN and TP concentrations when they were 5.8 ～ 9.4 and 0.2 ～ 0.3 mg/L respectively,and increased with increasing TP concentrations when it was above 0.3 mg/L.To reduce eutrophication,the focus of management must be on decreasing inputs of phosphorus and internal phosphorus inthe western area of the lake.
algal blooms chlorophyll- a Lake Chaohu TN TP
Li kun Zhang hong Xiao pu Huang yong
Anhui Academy of Environmental Science Research, P. R. China, 230061 Anhui Institute of Meteorology, Hefei, 230031, China
国内会议
武汉
英文
908-912
2009-11-01（万方平台首次上网日期，不代表论文的发表时间）