Naslov
Isotopic signature of the Sikirevci well field and its connection with the Sava River
(Isotopic signature of the Sikirevci well field and its connection with the Sava River)

Autori
Filipović, Vedrana ; Kovač, Zoran ; Kopić, Jasna ; Nakić, Zoran ; Parlov, Jelena ; Skopljak, Ferid

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Mathematical methods and terminology in geology 2022 / Malvić, Tomislav ; Ivšinović, Josip - Zagreb : Rudarsko-geološko-naftni fakultet Sveučilišta u Zagrebu, 2022, 115-122

ISBN
978-953-6923-48-9

Skup
Mathematical Methods and Terminology in Geology 2022: 4th Croatian scientific congress about geomathematics and terminology in geology

Mjesto i datum
Zagreb, Hrvatska, 24.10.2022. - 25.10.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
stable water isotopes ; Sikirevci well field ; Sava River ; hydrogeochemical facies

Sažetak
The Sikirevci well field is one of the most important well fields in the eastern Slavonia used for the public water supply. In this study, stable isotopes of water were used to determine the origin of water from pumped aquifer, but also to test its connection with the Sava River. From August 2020 till July 2021, groundwater samples were collected from four pumping wells, while historical chemical analyses were used to determine the hydrogeochemical facies. The isotopic signature of the Sava River was found to be different from that of the sampled aquifer. The stable isotopes of hydrogen and oxygen (δ2H and δ18O) of the groundwater are more negative than those of the Sava River, indicating that the Sikirevci well field pumps water from the deeper part of the aquifer where Sava River does not have such a strong influence, although the d-excess values do not show such a large difference. Moreover, the isotopic composition of the groundwater is very stable and does not change over time. This is consistent with the presence of iron, manganese and arsenic concentrations in groundwater, which indicate reductive conditions. However, the variations in the concentrations of the observed potentially toxic metals indicate that different geochemical conditions prevailed during the study period. Most of the water samples had hydrogeochemical facies CaMg-HCO3, while two samples had slightly higher levels of sodium and magnesium. Results of this research indicate different conclusions when observing main isotopic composition with respect to d-excess values. Although d-excess is observed as a second order parameter, it can greatly help in data interpretation.

Izvorni jezik
Engleski

Znanstvena područja
Matematika, Geologija, Rudarstvo, nafta i geološko inženjerstvo

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