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Basic information about a final thesisAdditional informationAdditional information about the final thesis follows. Click on the language link to display the information in the desired language.
|Language of final thesis:||Slovak|
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|Title of the thesis:||Determination of Soil Erosion Threats Using GIS|
|Summary:|| Soil belongs to a natural resource that is limited and easily destroyable. It is considered one of the most precious wealth of humanity. It is the result of long-lasting conversion rocks under conditions that are currently very difficult to duplicate.
Soil protection against erosion is one of the main priorities not only in agriculture. Soil erosion is a physical process that causes the movement of soil particles through mechanical action by external factors, resulting in organic matter loss, nutrients, soil depth reduction, and soil structure degradation.
The main aim of the bachelor thesis is to determine the potential and real erosion of the soil on individual solved plots in Ladice and Sľažany (Zlaté Moravce district) using the universal soil loss equation (USLE) and its modified form in relation to the topographical factor (LS).
In order to meet our goal, we have come to collect the necessary spatial and textual information and then to process them in the Geographic Information Systems environment. We determined the factor R as a table value according to the nearest meteorological station - Nitra. We obtained factor K as a table value as well. The basis for calculating the topographical factor (LS) is the creation of DMR by spatial interpolation from the zvektorizované peers of the basic SR map. By adjusting DMR for the needs of hydrological analyzes, we have eliminated local extremes and depressant depressions. Consequently, we deduced the slope of the slope as well as the flow direction that was the basis for calculating the uninterrupted slope length. Using slope and slope length, we calculated the LS factor using the raster calculator. We determined the use of land (cultivated crops) and the average annual value of factor C from the seed cooperatives from the agricultural cooperative. Factor P was not taken into account in the calculations due to the absence of counter-measures. We have obtained the potential and calculated (real) erosion of the soil by the effect of the erosion factors. Consequently, we confronted with the limit values of erosion, which represent the function of the depth of soil. From the perspective of erosive threat we used the classification of the erosion risk of agricultural soils in the Czech Republic. The result is map and table outputs of the potential and calculated (real) erosive threat to the agricultural land of the area being solved.
|Key words:||soil erosion, water erosion, graphical information system, universal soil loss equation, soil|
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