The Distribution of Chlorophyll-aand Its’ Correlation with Related Indicators in the Ulansuhai Lake, China
DOI:
https://doi.org/10.5890/JEAM.2014.06.003Abstract
The current study analyzed the spatial and temporal distribution characteristics of chlorophyll-a(Chl-a) based on the bimonthly monitoring data in the Ulansuhai Lake from May to November in 2013. Correlation between chlorophyll-aand related factors including Total Phosphorus(TP), Total Nitrogen(TN), Ammonia Nitrogen(NH4--N), Nitrate Nitrogen (NO2--N), Total Organic Carbon(TOC), Chemical Oxygen Demand (COD) and pH were also analyzed to find the influencing factors of chlorophyll-a. Results indicate that the concentration chlorophyll-awas reduced along with water flowing from North to South. The peak concentration and the foot concentration of chlorophyll-a occurred in July and November, respectively. Except for indicator COD, other factors present a certain correlation with chlorophyll-a. Negative correlation appeared in TOC (R = 0.650, p < 0.05) and pH (R = 0.951, p < 0.01) and positive correlation occurred in TP (R = 0.787, p < 0.01), TN (R = 0.796, p < 0.01), NH4 --N (R = 0.778, p < 0.01) and NO2--N (R = 0.656, p < 0.01). There is no primary factor that dominate the concentration of chlorophyll-a in the water. The current research may provide scientific basis for eutrophication control and management of eutrophic lakes.References
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