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WATER EROSION RISK ASSESSMENT, DIFFERENCES BETWEEN SLOVAK AND POLISH PROCEDURES
Abstract
Given an example watershed, calculation of the long-term average annual soil loss by the universal soil loss equation (USLE) is analyzed taking into amount the Slovak and Polish approaches. Six factors are considered the rainfall erosivity factor (R), the soil erodibility factor (K), the topographic factors (LS) and the cropping management factors (C and P). Differences in input and methodology are highlighted. The example micro-watershed (the Matny stream basin in the Beskid Wyspowy, the western Carpath, Poland) is located in Poland on the boundary with Slovakia (area 1.47 km2, the catchment land use structure is dominated by grassland - 73.5%, arable land covers - 14.3%, forests account - 9.5% and urban areas - 2.7%). Mean height of the catchment is 582.66 m asl. Weighted mean slope for the entire catchment is 16.28%. The length of the main watercourse is 2.37 km and its average slope is 5.7%. The results include the calculation of erosion runoff areas by category (none to slight, medium, prominent, very prominent, catastrophal) in both countries.
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