Calibration and Reliability in Groundwater Modelling: Credibility of Modelling

(Proceedings of ModelCARE 2007 Conference, held in Denmark, September 2007). IAHS Publ. 320, 2008, 322-328.

Estimating parameters of groundwater recharge model in frequency domain

Damir Jukić¹ & Vesna Denić-Jukić²

1 Croatian Waters, Water Management Department Split, Vukovarska 35, 21000 Split, Croatia

djukic@voda.hr

2 Faculty of Civil Engineering and Architecture, University of Split, Matice hrvatske 15, 21000 Split, Croatia

Abstract This paper presents the results of the application of the spectral method for determining the values of parameters of the groundwater recharge model for the Jadro and Žrnovnica springs located in the Dinaric karst area of Croatia. By using this frequency domain approach, groundwater-balance calculations are avoided so that the method can be applied on unexplored karst aquifers where groundwater-balance cannot be achieved without extensive geological and hydrogeological investigations. Since the results of several tracer tests show that the Jadro and Žrnovnica springs mostly share the same catchment, the values of parameters of the groundwater recharge model are estimated separately for both springs and the obtained results are compared and discussed.

Key words karst; groundwater recharge; spectral method; karst spring; hydrological monitoring