What is happening with frequency and occurrence of the maximum river discharges in Bosnia and Herzegovina?

Slobodan Gnjato; Igor Leščešen; Biljana Basarin; Tatjana Popov

doi:10.3986/AGS.13461

Authors

Slobodan Gnjato University of Banja Luka, Faculty of Natural Sciences and Mathematics, Banja Luka, Bosnia and Herzegovina https://orcid.org/0000-0002-7186-4872
Igor Leščešen University of Novi Sad, Faculty of Sciences, Novi Sad, Serbia https://orcid.org/0000-0001-9090-2662
Biljana Basarin University of Novi Sad, Faculty of Sciences, Novi Sad, Serbia https://orcid.org/0000-0002-2546-3728
Tatjana Popov University of Banja Luka, Faculty of Natural Sciences and Mathematics, Banja Luka, Bosnia and Herzegovina https://orcid.org/0000-0001-6836-276X

DOI:

https://doi.org/10.3986/AGS.13461

Keywords:

hydrology, maximum discharges, Una River, Sana River, Cox-Lewis test, trend, Bosnia and Herzegovina

Abstract

In this study, we explored the frequency and occurrence rate of maximum river discharges in the Una and Sana rivers, to understand hydrological variations amidst climate change. We categorized maximum discharges into severe (Una River M1 > 98.2 m³/s; Sana River M1 > 118.2 m³/s) and extreme (Una River, M2, > 123.4 m³/s; Sana River M2 > 246.4 m³/s) events, and identified trends in these events, crucial for assessing environmental impacts. Our findings reveal a nuanced pattern: both rivers experience an increase in severe events from 58 to 55 and 56 to 54 days return period respectively, indicating complex hydrological dynamics. The trends underscore the significant shifts in annual event occurrences, the evolving nature of river systems and underscore the necessity for adaptive management strategies.

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