STUDIES ON THE QUALITY OF THE DANUBE IN GIURGIU AREA

Abstract

The Danube river basin collects water from 19 continental European countries, covering an area of 801,463 km2 (according to ICPDR), and making it the most international river basin in the world. Giurgiu Environmental Protection Agency monitors water quality quarterly and the quality of sediment annually, taken from the sectors corresponding to kilometers 502, 511 and 520. The research in this paper is part of this monitoring program. The present work "Studies on the quality of the Danube in Giurgiu area", aims to achieve the following objectives: Determining the structure of phytoplankton biocenosis; Determining the dynamics of the seasonal variation of the physical-chemical parameters in the studied period; Correlation of the variation dynamics of phytoplankton density with the main physical-chemical parameters; Determining the ecological status of water quality in the studied sector. Both sampling areas are characterized by a good ecological status - the values of biological, hydro-morphological and physical-chemical elements have moderate deviations from the values characteristic of unaltered (reference) areas or minor anthropogenic alterations. In the future, it is recommended to monitor the Danube River in order to prevent possible sources of negative anthropogenic impact and to monitor it with an annual frequency in order to make sure that the ecological quality status is maintained at least at the current level.