SURFACE WATER QUALITY ASSESSMENT IN THE PIRIN NATIONAL PARK, BULGARIA
Published: 4 Jun 2015
Abstract: The protected area of Pirin National Park as a UNESCO heritage site is very important not only because of the exceptional biological diversity but also because of the water resources in a big quantity and excellent quality used for drinking water supply of all adjacent cities and villages, as well as for all human activities in this region. At the same time the Park is a very attractive touristic destination for people from all over the word both in winter and summer periods. From this point of view the protection of the surface water bodies at the catchment area of the Park against the pollution is a task of a great importance. The main objective of the study is to assess the quality of the main river and lake water bodies in the Pirin National Park. Data from the local monitoring on the water chemistry (electro- conductivity, temperature, pH, Biological Oxygen Demand, Chemical Oxygen Demand, as well as the concentration of Dissolved Oxygen, Suspended Particle Material, Dissolved compounds, N-NH4+, N-NO3-, P-PO43-, Fe and Mn) for the period 2004-2013 have been treated statistically. During the periods of high and low water level in 2014 a visit to 28 river and lake water bodies at the territory of the Park has been organised for observation, sampling for water chemistry, analysing and measuring of some parameters in the field. After processing and discussing the results obtained a recommendation is given to the point and diffuse sources of water pollution on how to protect the quality of the surface water in the Park.
Keywords: diffuse and point sources, glacial lakes, pollution, rivers, water chemistry
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