The most abundant river springs – Izvor Rječine, spring Zvir and springs Martinšćica have been analyzed and compared throughout the period of common observation from 1979 to 1990. General topics which characterize the observed area were elaborated – climate, hydrogeology of the river area and many other historically significant springs in Rijeka and its surroundings which even today have important roles were described. In the main part of the paper, comparison of characteristic maximum, mean and minimum annual and monthly flows have been conducted together with the mean daily flow for the three abovementioned springs. Since the data for the spring Zvir in year 1984 was missing, it was replaced with the regression analysis of the data recorded on springs Martinšćica. A comparison and analysis of the spring characteristics has then been conducted based on the completed data. It was shown that Izvor Rječine is drying up regularly every year, but is also the most abundant among the springs. Zvir and Martinšćica are not drying up and have therefore an indispensable role during the arid months, especially Zvir on which, during the more sunny periods when Izvor Rječine dries up, almost the whole water supply system of Rijeka’s aqueduct is relying.