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Journal of Environmental Accounting and Management 2(2) (2014) 123--131 | DOI:10.5890/JEAM.2014.06.003

Xufeng Mao$^{1}$,$^{2}$ Changhai Wang$^{3}$,$^{4}$, Xiaoyan Wei$^{5}$, Qiong Chen$^{1}$,$^{2}$

$^{1}$ College of Life and Geography Sciences, Qinghai Normal University, Qinghai, Xining 810000, P.R. China

$^{2}$ Key Laboratory of Tibetan Plateau Environment and Resources (Ministry of Education), Xining 810008, P.R. China

$^{3}$ Rural Development Institute, Chinese Academy of Social Sciences, Beijing 100732, P.R. China

$^{4}$ Collaborative Innovation Center for Rural Reform and Development, Beijing 100732, P.R. China

$^{5}$ International Educational Exchange Center, Qinghai Normal University, Xining 810000, P.R. China

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Abstract

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.

Acknowledgments

This work is supported by Special Fund for Basic Scientific Research Business of Central Public Research Institutes (CAFINT2012C9) and the National Science & Technology Pillar Program (2011BAC02B03).

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