Hydrological-hydraulic Efficiency Analysis of Sustainable Urban Drainage Systems in Šibenik

U ovom radu provedena je hidrološko-hidraulička analiza učinkovitosti održivog sustava odvodnje oborinskih voda na području grada Šibenika, odnosno s užeg dijela komercijalne zone Dalmare. Cilj ovog rada je procijeniti koliko zelena infrastruktura u urbanim sredinama pozitivno utječe na oborinske vode te sam okoliš. U prvom dijelu rada, uz opis područja istraživanja detaljno su opisane dostupne geodetske i meteorološke podloge. U QGIS programu provedena je prostorna analiza detaljnog pokrova zemljišta te su definirane topografske karakteristike sliva. Zatim je napravljena hidrološka obrada oborina gdje je konstruiran projektni pljusak metodom izmjeničnih blokova. Nakon toga, u SWMM programu napravljena su dva modela sustava za odvodnju oborinskih voda, jedan za postojeće stanje, a drugi za planirano stanje, koje uključuje implementaciju LID elemenata u postojeće stanje. Također, pomoću SWMM programa napravljena je hidrološko-hidraulička analiza otjecanja oborinskih voda te procjena kakvoće. Rezultati analize ukazuju na značajno smanjenje volumena otjecanja oborinske vode nakon ugradnje LID elemenata, kao i na poboljšanje kakvoće oborinske vode.This thesis describes a hydrological-hydraulic efficiency analysis of a sustainable urban drainage system in Šibenik, specifically a commercial zone Dalmare. The aim of this work was to evaluate how much green infrastructure has a positive impact on stormwater and the environment in urban area. First, a description of the research area, as well as the available geodetic and meteorological dana is presented. Next, an assessment of the detailed land cover was performed in QGIS software, and the topographic characteristics of the basin were defined. Then, a hydrological analysis of rainfall was conducted, which includes a construction of a design storm by the method of alternating blocks. After that, two models of the urban drainage system were constructed in the SWMM software, one for the existing system, and the other one for the planned system, which includes implementing LID elements to the existing system. Also, a hydrological-hydraulic analysis of stormwater runoff and an assessment of water quality was performed in the SWMM model. The results of the analysis indicate a significant reduction in the volume of the stormwater runoff after implementing of LID elements, as well as an improvement in rainwater quality