The aim of this study was to evaluate the relationship between precipitation and runoff in an exemplary Carpathian catchment using sublime analysis methods with the SWAT model. The results apply to a mountain catchment – the catchment of the Grajcarek stream located in the Małe Pieniny Mountains in the Polish Carpathians. The period 2019-2021 was studied. During the simulations, iterations were carried out with 50 numbers of simulations for each of the Biała Woda and Czarna Woda catchments. The following statistics were used to compare the model results: MAE, NSE, PBIAS, r and RMSE. The analysis showed multilevel parameter relationships between land use changes and their causal factors. The aforementioned methods of analysis highlighted the essence of these relationships. An important conclusion is that transformation towards arable land is practically non-existent. The influence of river sediment and surface runoff prevails here, which naturally links these two influencing factors. The statistical analyzes performed showed that the multiplicity and variability of the influence factors on structural transformation varies strongly. Methods of analysis (MAE, NSE, PBIAS and RMSE) showed that changes in use indicate natural or anthropogenic afforestation of arable land as grasslands, the main restructuring factors are sedimentation applied to the catchment, evapotranspiration, and water infiltration. This indicates a structural change towards a broadly greening of the catchment, resulting primarily from the extensification of agricultural production.