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Cross-Correlation and Cross-Spectral Analysis of the Hydrographs in the Northern Part of the Dinaric Karst of Croatia

Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
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These authors contributed equally to this work.
Geosciences 2019, 9(2), 86; https://doi.org/10.3390/geosciences9020086
Received: 24 December 2018 / Revised: 31 January 2019 / Accepted: 31 January 2019 / Published: 13 February 2019
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Abstract

Correlation and cross-spectral analysis of hydrographs was performed on the karst area of the mountainous section of the Kupa River in two time periods. Since there are karst aquifers in this area that is a part of strategic groundwater reserves of potable water, such an analysis could give better insight into the behavior of these aquifers. The functions used to describe karst aquifers are the cross-correlation function, coherence function, gain function, and phase function. The outcomes of the analysis results were very similar in the two analyzed periods, suggesting that differences in input signals between these two periods do not affect the aquifer function as a system filter. The results of this research suggest that the aquifer and overburden layer characteristics have a much stronger influence than the change of input signal on the runoff regime in the considered period. View Full-Text
Keywords: Dinaric karst; time series analysis; frequency analysis; cross-correlation; cross-spectrum Dinaric karst; time series analysis; frequency analysis; cross-correlation; cross-spectrum
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Pavlić, K.; Parlov, J. Cross-Correlation and Cross-Spectral Analysis of the Hydrographs in the Northern Part of the Dinaric Karst of Croatia. Geosciences 2019, 9, 86.

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