Abstract: A comparison study of water quality among different points/regions of Burgas Lake (Vaya Lake) in the Black Sea, region of Republic of Bulgaria, was undertaken. Dynamics of the water quality parameters in four seasons were investigated. Several water samples were collected from three regions of the lake near industrial and human activity areas. The samples were taken approximately 10-20 meters from the lake line, where the depth was 0.5-1.0 meter. Various tests were conducted to identify the levels of inorganic substances and physico-chemical parameters. The purpose of this research is to identify the changes in the ecological state of the lake, to identify trends in water quality, to specify the influence degree of the pollutants (chemical and biological) over the biodiversity of the lake and eventual use for recreational purposes. Based on the analyzed data, the pH was relatively basic, where it ranged between 8.1 and 5 with respect to all three points of sampling (North, Centre and South) of the lake. Conductivity ritched up to 3,110 µs/cm in fall season for Northern point of the lake while the minimum recorded conductivity was 971 µs/cm for central point of the lake in the spring time. Total insoluble solids’ recorded was 229 mg.Dm-3 in summer time for northern and the lowest value was 8.00 mg.Dm-3 for southern point of collection. Many other substances involving Cr2+, P, Fe³⁺, Cu²⁺, NO₃⁻ and others including heavy metals for the sediment. BOD, COD, microbial cells concentration, Nitrogen with its different state as well as saturated Oxygen were also analysed to determine the impact of human, industrial activities on water quality during four seasons of the year. Some of the data collected for such parameters have showed low concentrations which is an indicator for desirable level of pollution.
Keywords: Water quality, assessment, monitoring, physico-chemical parameters, Vaya Lake, Black sea.
Title: Monitoring and Water Quality Assessment of Burgas Lake (Vaya Lake) in the Black Sea Region of Republic of Bulgaria
Author: Adnan Falah, Gergana Peeva, Raliza Koleva, Husein Yemendzhiev, Valentin Nenov
International Journal of Life Sciences Research
ISSN 2348-313X (Print), ISSN 2348-3148 (online)
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