Danijel Orešić
Ivan Čanjevac
Ivan Madžar
PROTOČNI REŽIMI NA SAVI KOD RUGVICE, JASENOVCA I ŽUPANJE U XX. STOLJEĆU
DOI: 10.35666/28310438.2016.4.166
UDC: 911.2:556(497.5-11)“19“
Abstract: In order to analyse discharge regimes on the middle Sava River course three hydrologic stations are chosen having homogenous and as much continuous data on river discharge in the observed period 1931-2010. Those stations are Rugvica at the beginning of the middle Sava, station Jasenovac positioned just forehead of the Una river mouth and all the other large tributaries from Bosnia and Hercegovina and station Županja near the end of the middle Sava river course. At all three stations a notable negative trend of yearly mean and minimal yearly discharge is observed. Maximum yearly discharges at the same time show growth at Rugvica station, slowly decrease at Jasenovac and in Županja have a negative trend comparable to yearly mean discharge trend. Modern river discharge regime typology in Croatia places discharge regime at Rugvica into Perripannonian pluvial-nival type, while discharge regimes at Jasenovac and Županja fall into Pannnoninan pluvial-nival type. Comparison of discharge regimes by climatological standard periods 1931-1960 and 1961- 1990 as well as modern 30 year period 1981-2010 showed that important changes in the course of mean monthly discharges occurred already in the period 1961-1990 compared to the previous 30 year period.
Key words: discharge regime, discharge trends, Sava River Basin, hydrogeography, hydrology.