Artificial recharge of karst aquifer on the example of Gradole spring : master’s thesis

Umjetno napajanje vodonosnika postaje sve interesantnija i češća metoda. Primjenu nalazi u sprječavanju prodora slane vode, obnovi onečišćenih vodonosnika, osiguravanja izdašnosti na izvoru. Za uspješno izvođenje umjetnog napajanja vodonosnika potrebno je imati ispunjene i određene hidrološke i hidrogeološke uvjete, te tu do izražaja dolazi heterogenost i osjetljivost krškog vodonosnika koja stvara probleme prilikom karakterizacije vodonosnika, odabira metode i lokacije za izvršenje napajanja. Na krškom vodonosniku sliva izvora Gradole koji se nalazi u središnjoj Istri, 1988. godine izvedeno je umjetno napajanje ulijevanjem vode iz akumulacije Butoniga izravno u ponor Čiže. Brzom reakcijom vodonosnika, unutar par dana, došlo je do povećanja izdašnosti na izvoru i osiguravanja dovoljne količine vode za vodoopskrbu.Artificial recharge of karst aquifer is becoming more and more interesting and common. The method is used to prevent seawater intrusions, in recovery of polluted aquifers, to ensure the neccessary spring discharge and much more. To be able to use this method successfully, certain hydrological and hydrogeological conditions must be met. This is when, due to heterogeneity and sensitivity of the karst aquifers, it becomes difficult to characterize them, select a method and choose the location for the recharge. The karst aquifer of Gradole spring basin, located in central Istria, was artificially recharged in 1988. The recharge was done by the inflow of water from the Butoniga reservoir directly into the Čiže swallow hole. By rapid reaction of the aquifer, within a couple of days, the discharge of the Gradole spring was increased, which provided a sufficient amount of water for the water supply