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ANALYSIS OF THE FILLING QUANTITY OF THE AVAILABLE SOIL WATER STORAGE ON THE PROTECTED SOIL RESOURCES OF THE ZITAVA RIVER CATCHMENT (SLOVAKIA)
Abstract
The article deals with the analysis of the filling quantity of the available soil water storage (in depth of 0 ? 30 cm) on the protected soil resources only in arable land of the Zitava river catchment (Slovakia). The filling quantity of available soil water storage is expressed by the ratio between the currently available soil water storage and the potentially available soil water storage. The filling quantity of available soil water storage in protected soil resources in the territory was analysed in two years, in 2013 and 2014. Subsequently, a model of the available soil water storage of a given area was elaborated for the year of 2050, which provided a forecast of the soil water storage on protected soils in a given location in the future. Protected soil sources were identified according to the code of evaluated soil ecological units (soil classified under 1-4 protection class). Each analysed and modelled year is also represented by a partial analysis of the filling quantity of soil water storage in the spring (May), summer (August), autumn (October) and winter (January). In the January months, with regard to the area of protected soil resources, the soil water storage in the years 2013, 2014 and 2050 was rising. As for the spring period, the largest area of protected soil resources was represented by filling quantity of the available soil water storage in the range of 84.00 ? 87.48% in 2013, in 2014 it was the filling quantity of soil water storage represented from 94.60 to 98.85%. The biggest area of protected soils had a filling quantity of soil water storage range of 98.46 ? 100.0%, in the modelled year 2050 in the autumn period. In the analysed and modelled year, the summer months reached the lowest values of the filling quantity of soil water storage (e.g. year of 2013: 63.30 ? 66.65% on the most represented protected soils. In the fall months, the results were similar in character to the winter season.
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