The hydrological modeling can be considered as one of major possibilities for the quantification and qualification of changes in hydrological processes. For the application the WetSpa (Water and Energy Transfer between Soil, Plant and Atmosphere) model calibrated for the Hornad River Basin have been chosen. WetSpa simulates the most important hydrological processes in a river basin, such as runoff, actual evapotranspiration, groundwater recharge, and hydrographs at selected locations in the stream network, etc. The application have been done in the frame of the scientific objectives of the Tisza River Project - Reallife scale integrated catchment modelling for supporting water-related environmental management decisions (5th Framework Programme EU on Research and Technology Development). The Department of Hydrology and Hydraulic Engineering, the research unit of the Free University of Brussels (VUB) in cooperation with Slovak Hydrometeorological Institute (SHMÚ) and Water Research Institute in Bratislava (VÚVH) were responsible for calibration, validation and application of the WetSpa model in the Hornad River basin. and Pri hodnotení vplyvu využívania krajiny na priebeh povodní v povodí Hornádu sa aplikoval model WetSpa. Fyzikálne založený model bol vyvinutý na simuláciu a predpoveď prenosu vody a energie medzi pôdou, rastlinstvom a atmosférou (Water and Energy Transfer between Soil, Plants and Atmosphere- WetSpa). Modelové riešenie sa použilo v úlohe 5. rámcového programu EÚ ''Projekt rieky Tisa - integrované modelovanie povodia na podporu rozhodovacieho procesu v oblasti vody a prostredia od nej závislého''. Zodpovedným pracoviskom pre vytvorenie a aplikovanie modelu bolo Oddelenie hydrológie a hydrotechniky Univerzity Vrije v Bruseli. Úlohou spolupracujúcich organizácií zo SR (Slovenský hydrometeorologický ústav a Výskumný ústav vodného hospodárstva) bolo zabezpečiť a poskytnúť vstupné údaje a konzultácie pri kalibrácii modelu a jeho aplikácii.