HYGIENIC ASSESSMENT OF THE WATER RESERVOIRS "STUDENA", "BISTRICA" AND "PCHELINA", BASED ON PERFORMED HYDROBIOLOGICAL ANALYZES AND DETERMINATION OF SOME CYANOTOXINS
Journal Title: Българско списание за обществено здраве (Bulgarian Journal of Public Health) - Year 2015, Vol 0, Issue 4
Abstract
For the water bodies, used for drinking water supply of the populated areas or recreation by the public, it is very important to know what their saprobity is, how far they have reached in their environmental development and whether they represent actual or potential danger to people. The aim of this study is to determine the hygienic status of three dams - "Studena", "Bistrica" and "Pchelina", tracking what phytoplankton communities develop in them, what kinds of species bloom, whether any blue-green algae and their toxins are observed in the water and what is the water body saprobity. The study covers four years. The applied methods are classic hidrobiological - qualitative and quantitative analyses. Saprobity state is determined by the method of Pantle-Buck. The obtained results for the three reservoirs show a constant β - mesosaprobic state, which is typical equilibrium state of surface waters. Blue-green algae grow in the three dams and this requires their permanent monitoring in the future. The surveys for occurrence of the most dangerous blue-green algae toxins called cyanotoxins show their presence in the three investigated water bodies and prove the necessity of systematic observation of water quality. In this way, in case of possible development of toxic blue-green algae, timely preventive measures will be taken and health problems of people having contact with the water from these reservoirs will be prevented. Especially Studena dam, which supplies with drinking water the City of Pernik.
Authors and Affiliations
Vesela Georgieva, Vera Pavlova, Zlatka Bratanova
Keywords
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