Abstract
The aim of this paper is to identify the spatial and temporal distribution of chemical and physical parameters that characterize the water quality, the trophic state and the self-purification capacity assessment of Snagov Lake. The Snagov Lake is a natural lake located at 25-30 km North from Romania�s capital, Bucharest. The study was conducted during a five years period, from April 2010 until October 2014. The measurements used (temperature, pH, dissolved oxygen, transparency, chlorophyll-a, total phosphorus, TN/TP ratio) are presented in the form of spatial and temporal evolutions. For self-purification identification the aerobic mineralization degree, biological depuration factor and TN/TP ratio were used. The trophic stage of Snagov Lake in the range and in all the points of sampling is eutrophic�hipereutrophic for all the parameters used for assessment, excepting several short periods of time (fall of 2010, spring and fall of 2011) when the lake was in mesotrophic state.
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