Dynamics of Surface Runoff and Agrochemicals Concentration from Sloped Vine Growing Positon under Different Precipitation Intensity

South and southwest hillslope terrains are favorable areas for vine cultivation, but because of the slope they are susceptible to erosion and surface runoff, especially after intensive precipitation. The study was conducted at the Jazbina experimental station located in Zagreb County (UniZG Faculty of Agriculture, Department of Viticulture and Enology), with a pronounced slope (~20 %) and inter-row grass mulch practice. Surface runoff collectors were set up in the inter-row of the 20 years old Pinot Blanc vineyard, where phosphorus, potassium, copper sulfate and herbicide (glyphosate) were applied. Data were acquired from the automatic meteorological station (Pinova), and in addition to the natural precipitation, different intensity precipitation events were simulated as well. Immediately after precipitation, volume of surface runoff was measured and samples taken for the analyses in an accredited laboratory (MELILAB, UniZG Faculty of Agriculture, Department of Soil Amelioration) and at the Institute for Medical Research and Occupational Health (Zagreb). Results confirm that at the investigated vineyard terrain precipitation intensity significantly affects surface runoff, as well as its chemical composition, i.e., herbicide and macro/microelement concentration. To prevent negative (agro)ecological impacts (e.g., surface and/or groundwater pollution), agrochemicals in vineyards should be applied in accordance with the sustainable agriculture guidelines.