Due to its unique geographical location and extremely small area, various factors and influencing factors of neighbouring geographical landscapes are intertwined in Slovenia. This in turn, affects the geomorphometric, climatic and hydrological features, as well as the land cover and land use on each hydrographic unit/area. In favour of a very well developed and structured Slovenian watershed coding system and with the use pre-prepared spatial databases in geographic information systems, the determination of watershed characteristics is relatively simple. In the diploma thesis, the basic morphometric characteristics and typical land uses, average annual precipitation (1980-2010), stream order and erosion factors LS and R are calculated and presented for each Slovenian hydrographic unit on the 3rd level. So prepared data are the basis for further comparative analyses and hydrological studies and modelling. Furthermore, we compared the results of characteristics between individual hydrographic areas belonging to the same main watershed. Additionally, an analysis of the dependence of individual watershed characteristics using the Pearson correlation coefficient was conducted. The results of the characteristics of the hydrographic areas showed, in the vast majority, a high dependence on the geographical location and a large influence of the geographical landscape to which they belong. Higher areas located in the northern and western part of Slovenia (Julian Alps) showed relatively higher average values of geomorphometric characteristics than areas belonging to the Pannonian plain. According to the results of erosion factors RUSLE (LS, R), the Alps are also one of the areas in the European Union with the highest values of factors for determining the soil erosion rate.
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