The terrain slope at the hillslope agricultural sites, unstable soil structure and agrotechnical practices increase the intensity of processes such as preferential and vertical flow of water, surface runoff and soil erosion. As part of the SUPREHILL project, research was carried out where undisturbed soil samples i.e., the soil columns were taken at the top, in the middle and at the bottom of the slope in three repetitions. The aim of the research was the quantification of water and transport of solutes (bromides) in the unsaturated zone of hillslope agricultural soil using undisturbed soil columns taken at the top, middle and bottom of the slope. Solute transport and water flow were determined by applying potassium bromide (KBr) tracer to each column followed by bromide (Br-) washout with intermittent irrigation. To each column, 8150 ml of rainwater was applied, while the amount of leachate ranged from 7177 ml (bottom of the slope) to 7526 ml (top of the slope). By applying Brilliant Blue dye, preferential flow in the columns was determined. The columns were cut transversely after dye application, and the sections were photographed to determine the percentage of staining using the ImageJ program. On column 1 (top) staining was recorded in the range from 24.82 to 34.12%, on column 3 (middle) from 26.8 to 36.07% and on column 5 (bottom) from 26.27 to 37, 67%. The statistical processing of the data shows the difference in the concentration of bromide in the percolate at the top (0.21001 mg Br-), in the middle (4.01371 mg Br-) and at the bottom of the slope (6.59332 mg Br-), from which it can be concluded that the slope has a significant effect on transport processes in the soil.