The regime of inflow and runoff from Vrana Lake and the risk of permanent water pollution


Material Information

The regime of inflow and runoff from Vrana Lake and the risk of permanent water pollution
Series Title:
RMZ-Materials and Geoenviroment
Ožanić, Nevenka
Rubinić, Josip
Publication Date:


Subjects / Keywords:
Vrana Lake ( local )
Island Karst Aquifer ( local )
Protection Of The Lake Water ( local )
Pollution Incident ( local )
serial ( sobekcm )


Vrana Lake on the Cres Island (Croatia) is a specific natural phenomenon of 220 million m3 of fresh water on the island's karst. Cres is small island with the total area of only 405, 78 km2 and the lake is only 2 to 3 km away from the island's coast. The Lake is kryptodepression which has neither directly measurable inflow nor runoff. It is functioning as balance relation between salt and fresh water in karst aquifer. The dynamic of water exchange besides through lakes surface is happening through its underground aquifer also. The Lake is the only source of water supply for islands Cres and Losinj. Because of the noticed trend of declining of the water level at the end of eighties, complex hydrological, hydrogeological, hydrochemical, limnological and ichtiological researches started. Main goal of mentioned researches was the Lakes protection from overpumping, e.g. from over declining of the water level that could permanently result in salination of fresh water. On the other hand attention should also be focused on possible contamination of water with pollutants that could enter the Lake through underground. Inside of the Lakes catchment area is 5 to 6 km long part of the magistral road and it presents potential contamination source. Present work analyses mechanisms of the potential contamination of the Lake's system. Interrelation between dynamic of fluctuations of underground and Lake's water level and the regime of functioning of the Lake's karst aquifer were performed. Results show that single pollution incident could permanently devastate lake with the resulting loss of water supply.
Original Version:
RMZ-Materials and Geoenviroment, Vol. 50 (2003).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

USFLDC Membership

University of South Florida
Karst Information Portal

Postcard Information



Download Options


No images or PDF downloads are available for this resource.

Cite this item close


Cras ut cursus ante, a fringilla nunc. Mauris lorem nunc, cursus sit amet enim ac, vehicula vestibulum mi. Mauris viverra nisl vel enim faucibus porta. Praesent sit amet ornare diam, non finibus nulla.


Cras efficitur magna et sapien varius, luctus ullamcorper dolor convallis. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Fusce sit amet justo ut erat laoreet congue sed a ante.


Phasellus ornare in augue eu imperdiet. Donec malesuada sapien ante, at vehicula orci tempor molestie. Proin vitae urna elit. Pellentesque vitae nisi et diam euismod malesuada aliquet non erat.


Nunc fringilla dolor ut dictum placerat. Proin ac neque rutrum, consectetur ligula id, laoreet ligula. Nulla lorem massa, consectetur vitae consequat in, lobortis at dolor. Nunc sed leo odio.