Author:
Ganchev Todor,Markova Valentina,Valcheva-Georgieva Ivalena,Dobrev Ivan
Abstract
Varna Lake is of great social and economic importance for the city of Varna and the entire region. The urbanisation of the areas surrounding the Varna-Beloslav Lake complex and the accelerated industrialisation around the coastline of Varna Bay have significant anthropogenic pressure on the aquatic ecosystem. An essential aspect is that industrial development, maritime transport and urbanisation are substantial sources of large-scale inorganic and organic pollution with all the resulting negative consequences. Recent measurements show that the surface sediments, which are a source of nutrients for the water body of Varna Lake, are contaminated with heavy metals and oil products. In this paper, we present a quantitative assessment of the degree of contamination with heavy metals (Hg, As, Fe, Cu, Pb) and petroleum products in the upper sediments of Varna Lake and then discuss opportunities for using some of these pollutants as a resource. The exploitation of these resources would bring significant benefits for improving the ecological status of Varna Lake.
Reference14 articles.
1. Krastev T., Stankova St., Natural geography of Bulgaria and the Black Sea. Part I General characteristics of the national geographical space. Sh., UE“Е. Konstantin Preslavsky”, ISBN 978-954-577-414-0, p. 240, (2008)
2. Lambev Т., Prodanov B., Dimitrov L., Kotsev I., Digital terrain model of the Varna and Beloslav Lakes, North Bulgarian Black Sea Coast, Proc. SPIE 11524, Eighth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2020), 1152422 (26 August 2020), doi: 10.1117/12.2571104, (2020)
3. Assessment of pollution with heavy metals and petroleum products
in the sediments of Varna Lake
4. Stefanova K., Diagnostics of the ecological potential in the Beloslav-Varna lake system and assessment of the environment according to zooplankton indicators, Journal of the Union of Scientists Varna, Section “Marine Sciences”, p. 28, (2014)