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	Spatial and temporal variations of chlorophyll-a concentration from 2009 to 2012 in Poyang Lake, China
	Wang J. L.; Zhang, Y. J.; Yang, F.; Cao, X. M.; Bai, Z. Q.; Zhu, J. X.; Chen, E. Y.; Li, Y. F.; Ran, Y. Y.
	2015
关键词	Water color remote sensing Retrieval model Chlorophyll-a concentration Spectral analysis Remote-sensing inversion Poyang Lake suspended particulate matter flood frequency coastal waters satellite data nitrogen imagery algorithms model finland region
英文摘要	Water eutrophication in Poyang Lake, the largest freshwater lake in China, has been considered to be an obstacle to aquatic environment protection and regional sustainable development. Chlorophyll-a concentration is one of the most important indices of water eutrophication. This paper builds seasonal chlorophyll-a concentration retrieval models using a semi-analytical model. Quarterly distributions of chlorophyll-a concentration from 2009 to 2012 are explored using multi-spectra data from a moderate-resolution imaging spectroradiometer (MODIS). The correlation coefficient of the retrieval models primarily ranged from 0.6 to 0.9. The results show that the chlorophyll-a concentration in Poyang Lake has significant seasonality characteristics that present low values in the winter and spring, and present relatively high values in the summer and autumn; this report also presents an obvious, increasing trend of inter-annual variability from 2009 to 2012. The spatial distribution of the chlorophyll-a concentration has regional differences that give relatively high values adjacent to the shore in the north area of Poyang Lake, in the flow in river entries, and in the main channel area in the central and south areas of Poyang Lake. The natural hydrology features have a close relationship with the variation in the chlorophyll-a concentration. Intensive human activities are the main driving forces for the increasing chlorophyll-a concentration.
出处	Environmental Earth Sciences
卷	73
期	8
页	4063-4075
收录类别	SCI
语种	英语
ISSN号	1866-6280
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/38931]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Wang J. L.,Zhang, Y. J.,Yang, F.,et al. Spatial and temporal variations of chlorophyll-a concentration from 2009 to 2012 in Poyang Lake, China. 2015.

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