The present doctoral research describes the impact of diffuse and point sources on the pollution of the
hydrosphere with nitrogen and phosphorus compounds in the Goričko Landscape Park research area. The Goričko Landscape Park research area was divided into three parts: the River Basin of the Ledava, Velika Krka rivers, and the Kobilje Creek. In this manner, we were able to perform a comparative analysis inside the Landscape Park and in three sub-areas. In the scope of the methodological research we established that the comparison of the structure of use of the land among these three areas revealed certain differences. In the scope of the research we performed the monitoring of the liquid hydrosphere and researched the chemical status of the surface flowing water in the Goričko
Landscape Park area. Within all three sub-areas significantly higher concentrations of nitrogen and
phosphorus compounds were found in the water. The presence of nitrogen and phosphorus compounds is the result of unregulated slurry pits in livestock farming facilities, an unregulated sewerage infrastructure and the loss of nitrogen and phosphorus compounds in the farming land. The forest is another significant source of nitrogen compounds. The calculated ratio Ntotal/Ptotal differs in different sampling points and ranges between 2 and 12. Using this method based on the balance approach we determined direct emissions from the livestock facilities into drains as the main source of nitrogen and phosphorus compounds. The results of the method for ecological characterization show the indirect impact of the terrain and slope on the hydrosphere. The average pollution burden (kg/ha) in one year was higher in the sub-area of the Kobilje Creek, where the share of farming land used for arable land and gardens was the highest.
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