Impact of an inter-basin water transfer and reservoir operation on a karst open streamflow hydrological regime: an example from the Dinaric karst (Croatia) (CROSBI ID 167873)
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Bonacci, Ognjen ; Andrić, Ivo
engleski
Impact of an inter-basin water transfer and reservoir operation on a karst open streamflow hydrological regime: an example from the Dinaric karst (Croatia)
This paper describes the hydrological changes caused by inter-basin water transfer and the reservoir development on the hydrological regimes of two rivers. The Sabljaki Reservoir in the Zagorska Mrežnica River and the Bukovik Reservoir in the Upper Dobra River began operation in 1959. Both are part of the hydroelectric power plant (HEPP) Gojak, which installed capacity is 50 m3/s. Their water volumes at the spillway altitudes of 320.10 m a. s. l. and 320.15 m a. s. l. are 3.3 × 106 m3 and 0.24 × 106 m3 respectively. Both the Dobra and Mrežnica Rivers are at the same time losing, sinking and underground karst rivers. A 9376 m long tunnel provides water from the Sabljaki Reservoir to the HEPP Gojak which was constructed in the Lower Dobra River. The Sabljaki Reservoir is located in the Plaški karst polje while the Bukovik Reservoir is located in the neighboring Ogulin karst polje. The consequences of the inter-basin water transfer are strong and abrupt changes in the hydrological regimes of the downstream sections of both rivers. At the same time, the construction and development of the both reservoirs caused hydrological changes to the upstream section of the Upper Dobra River.
karst hydrology; losing; sinking and underground karst river; inter-basin water transfer; Dinaric karst (Croatia)
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