A number of salinity measurements were made in the first half of 2012 at the lower reaches of the Rječina River. The presence of stratified fresh water flow above the salt water wedge was established at the estuary of the Rječina River. Several regression analyses were made in order to describe functional relationship between the Rječina flow rate and the salt wedge length. The comparison of measured salt wedge dimensions and the Keulegan semi-empirical expressions is also presented in the paper.
