Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi

Sinking karst rivers hydrology: case of the Lika and Gacka /Croatia) (CROSBI ID 146836)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Bonacci, Ognjen ; Andrić, Ivo Sinking karst rivers hydrology: case of the Lika and Gacka /Croatia) // Acta carsologica, 37 (2008), 2; 185-196

Podaci o odgovornosti

Bonacci, Ognjen ; Andrić, Ivo

engleski

Sinking karst rivers hydrology: case of the Lika and Gacka /Croatia)

In this paper a case of very special hydrological behaviour of two neighbouring sinking karst rivers, Lika and Gacka, (Dinaric karst of Croatia), is analysed. The Lika River has a torrential hydrological regime. At the Sklope gauging station its minimum, mean and maximum measured discharges in the 1951-2005 period were: 0 (dry) m3/s : 24.5 m3/s : 729 m3/s. During the same period the Gacka River, at the Vivoze gauging station, had the following characteristic discharges: 2.29 m3/s ; 14.7 m3/s ; 71.0 m3/s. While the flow regime of the Lika River is characterised by extremely and very quick changes of discharges, the Gacka River flow regime is unusually uniform. The objective of the investigations made in this paper was to analyse the extremely different hydrological behaviour of the two neighbouring sinking rivers in order to find its reasons. Master depletion curves defined for the two analysed rivers shows that the karst aquifer of the Gacka River is much more abundant than Lika’ s. The difference in the water temperature regime of the two neighbouring rivers is extremely high. At the Lika-Bilaj gauging station the minimum, mean and maximum measured water temperatures in the period of 1964-1991 were: 0.6 °C ; 9.3 °C ; 21.4 °C. During the period of 1964-2005 the Gacka River, at the Čovići gauging station had the following characteristic water temperatures: 6.4 °C : 9.1 °C : 11.6 °C. The resident time in the karst underground of water discharging from the Gacka karst springs is much longer than in the case of the Lika River. The most probable explanation for this unusual hydrological behaviour of the two neighbouring karst rivers is that water from the Lika River and its catchment recharges some karst springs of the Gacka River. It is concluded that the Lika River feeds the Gacka River with an average annual discharge of about 5.35 m3/s. This value is different during each year and depends on the hydrological situation. It is very probably higher during the wet years than during the dry ones.

karst hydrology; sinking river; water temperature; Lika and Gacka Rivers (Croatia)

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

37 (2)

2008.

185-196

objavljeno

0583-6050

Povezanost rada

Građevinarstvo

Indeksiranost