Characterization of the Gacka River basin karst aquifer (Croatia): Hydrochemistry, stable isotopes and tritium-based mean residence times

Ozyurt, N. Nur; Lutz, H. O.; Hunjak, Tamara; Mance, Diana; Roller-Lutz, Zvjezdana

doi:10.1016/j.scitotenv.2014.04.018

Cited by 28 publications

(12 citation statements)

References 17 publications

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“…This is consistent with the geological situation: the spring is located close to the geological boundary with the impermeable clastic rocks situated on the southern margin of the Northern Velebit. The δ 18 O values of samples collected in the caves and the ST spring are comparable to values for some of the Gacka river springs sampled during summer months of 2005(MANDIĆ et al, 2008OZYURT et al, 2014). This indicates similar mechanisms of winter (wet) season recharge of water storages, which are slowly drained during the dry season.…”

Section: Groundwatersupporting

confidence: 59%

Northern Velebit (Croatia) karst hydrological system: results of a preliminary 2H and 18O stable isotope study

Paar¹,

Mance²,

Stroj³

et al. 2019

Geol Cro

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Journal of the Croatian Geological Survey and the Croatian Geological Society heterogeneous hydraulic properties manifested by rapid groundwater flows concentrated in conduits and disolutionally widened fractures, usually sparsely distributed, while the storage of groundwater is mainly related to surrounding fractured rock matrix and surficial epikarst (or subcutaneous) zone (GOLDS-CHEIDER et al., 2007). Because of its complexity, karst aquifer research necessitates an interdisciplinary approach (DREYBRODT, 1988; COVING-TON et al., 2011). In addition to conventional methods, the use of environmental stable isotope tracers supplemented by statistical analysis, contributes to a better understanding of karst hydrogeology (CRISS et al., 2007; PALMER, 2010; GRIMMEISEN et al., 2017). Stable isotopes of water (2 H and 18 O) are analysed for several reasons, e.g. to explore recharge processes and reservoir mixing (LONG & PUTNAM, 2004; MALOSZEWSKI et al., 2002), to explore vadose water mixing, residence times and storage in non-conduit parts of karst systems (PALMER, 2010; MO-ERMAN et al., 2014; DÓŠA et al., 2011), to estimate mean recharge area elevations (BARBIERI et al., 2005; CHARIDEH & RAHMAN, 2007), etc. Detailed knowledge of the various processes within a karst hydrological system is crucial for the sustainable management of water resources, their allocation, and protection against pollution (MANCE et al., 2018 a, b). The black-box approach is often used

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Section: Groundwatersupporting

confidence: 59%

Northern Velebit (Croatia) karst hydrological system: results of a preliminary 2H and 18O stable isotope study

Paar¹,

Mance²,

Stroj³

et al. 2019

Geol Cro

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“…The study of physiochemical, major ion and isotope values allows for interpretation of origin and age of infiltrated waters (Ozyurt et al, 2014) and helps to constrain the hydrological behaviour of the system (i.e. water inputs from different galleries, connections between shafts, flooding effects, mixing with deep saline waters, etc.).…”

Section: Introductionmentioning

confidence: 99%

Hydrochemical characterization of a mine water geothermal energy resource in NW Spain

Loredo

Ordóñez

García-Ordiales

et al. 2017

Science of The Total Environment

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Abandoned and flooded mine networks provide underground reservoirs of mine water that can be used as a renewable geothermal energy source. A complete hydrochemical characterization of mine water is required to optimally design the geothermal installation, understand the hydraulic behaviour of the water in the reservoir and prevent undesired effects such as pipe clogging via mineral precipitation. Water pumped from the Barredo-Figaredo mining reservoir (Asturias, NW Spain), which is currently exploited for geothermal use, has been studied and compared to water from a separate, nearby mountain mine and a river that receives mine water discharge and partially infiltrates into the mine workings. Although the hydrochemistry was altered during the flooding process, the deep mine waters are currently near neutral, net alkaline, high metal waters of Na-HCO3 type. Isotopic values suggest that mine waters are closely related to modern meteoric water, and likely correspond to rapid infiltration. Suspended and dissolved solids, and particularly iron content, of mine water results in some scaling and partial clogging of heat exchangers, but water temperature is stable (22ºC) and increases with depth, so, considering the available flow (>100 L s -1 ), the Barredo-Figaredo mining reservoir represents a sustainable, long-term resource for geothermal use.

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“…Based on their abundance variations, stable isotopes of water ( 2 H, 18 O) have successfully been used as natural hydrological tracers determining water origin, hydrograph separation, mean residence time determination, etc. [4,10,22,23].…”

Section: Stable Isotopes Of Watermentioning

confidence: 99%

Marine Pollution Differentiation with Stable Isotopes of Groundwater

Mance

Lušić

2018

Pomorstvo (Online)

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Stock and flow pollution differentiation is the basis for efficient pollution-abatement mechanism designs. The focus of our research has been marine pollution from land-based sources. Stable isotope analysis of groundwater is an acknowledged method for karst aquifer characterisation. We have tested whether stable isotopes of water, when used as a proxy for groundwater dynamics in the karst, could also be used as an indicator of marine pollution differentiation in terms of flow and stock pollution. The focus has been on two close coastal locations characterized by differences in terms of open and closed sea as well as anthropogenic pressure. A static Estimated General Least Squares (EGLS) statistical model described the closed bay location suggesting stock pollution. For a good description of the open sea location, we have had to resort to dynamic Generalised Method of Moments (GMM) statistical modelling, indicating flow pollution. Stable isotopes of groundwater together with appropriate statistical tools have proved to be a useful tool of marine pollution differentiation into stock or flow.

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Characterization of the Gacka River basin karst aquifer (Croatia): Hydrochemistry, stable isotopes and tritium-based mean residence times

Cited by 28 publications

References 17 publications

Northern Velebit (Croatia) karst hydrological system: results of a preliminary 2H and 18O stable isotope study

Northern Velebit (Croatia) karst hydrological system: results of a preliminary 2H and 18O stable isotope study

Hydrochemical characterization of a mine water geothermal energy resource in NW Spain

Marine Pollution Differentiation with Stable Isotopes of Groundwater

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