Green infrastructure implementation and its influence on the hydrologic parameters of the urban catchment: Case study of the city of Trebišov, Slovakia

Institute of Hydrology, Slovak Academy of Sciences, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture in Nitra

Abstract

This study presents changes in hydrologic characteristics of the urban catchment that are result of the implementation of the green infrastructure. Such data are used as a base for modeling of the urban drainage water flows. The research and its results are presented on the case study performed in the city of Trebišov, Slovakia. For the evaluation of hydrological parameters and their changes, available maps and a digital model of the terrain were used. Percentage of impervious, semi- and pervious surfaces, expected average curve number, travel time were determined, all in the particular sewer network subcatchments. Consequently, the areas of the city that have the highest development potential in the context of the implementation of green infrastructure were determined, were elaborated three different alternatives. The preliminary results of the current status research show, that the area of impervious areas is around 23% of the Trebišov inner city. Parks and squares account for about 10% of the city, and besides that, about a third of the area is occupied with concentrated private development. According to preliminary assessment, in the “maximal” GI implementation alternative the application of LID practices is appropriate for 12-15% of Trebišov area.