The periods before and after the construction of HPP Orlovac in 1973 are analyzed. The available daily data are the rainfall, air temperature and relative humidity from three locations, as well as the discharge from two springs. In this study, the correlation and spectral analysis are applied on the catchment of Rumin Springs located in the Dinaric karst area between Croatia and Bosnia and Herzegovina. Partial correlation functions (PCF) are a mathematical tool of the correlation analysis which practical applicability in karst hydrology is insufficiently explored. The correlation analysis most often has been based on determination of correlation coefficients and correlation functions. Among these methods, correlation and spectral analysis have had an important role.

Various methods of time series analysis have been used in studies of karst hydrological systems.

The construction and operation of the reservoir system Buško Blato - HPP Orlovac. Spring Veliki Rumin is presently on average about 2.7 times smaller than it was in the spring’s natural state due to Based on hydrologic methodology, the paper estimates theĪpproximate spring recharge area in the spring’s natural and present states, concluding that the recharge area of the The averageĪnnual discharge, which in the natural state equalled 18.63 m3 s-1, was reduced by 11.57 m3 s-1 (62.1 %) and equalledħ.06 m3 s-1 in the recent subperiod from 1973 -2013. Than those during the operation of the reservoir system Buško Blato - HPP Orlovac, which still apply. In the 1948-1972 subperiod, characteristic annual discharges (minimum, mediumĪnd maximum) under natural conditions undisturbed by anthropogenic activities were statistically significantly larger Veliki, the paper also utilizes annual precipitation data measured at the meteorological station Sinj located in the Apart from daily discharges of the spring Rumin Aĭetailed hydrological analysis performed in the paper is based on available daily discharge data in the period fromġ January 1948 to 31 December 2013, with discharge measurements for the two suberiods missing: (1) 1 Januaryġ985 to 5 August 1985 and (2) 1 September 1991 to 30 June 1992. The start of the HPP Orlovac operation, in particular the construction and filling of the reservoirīuško Blato in Livanjsko polje, lead to a sudden change in the hydrological regime of this high-yield karst spring. The spring is located in the Cetina River basin in Croatia, although its recharge area is partially in Croatia andīosnia-Herzegovina. The paper presents a hydrological analysis performed on the permanent karst spring Rumin Veliki.

Hidroloska mjerenja zavrsni