Hydrogeological properties of a complex Dinaric karst catchment: Miljacka Spring case study

Terzić, Josip; Marković, Tamara; Reberski, Jasmina Lukač

doi:10.1007/s12665-013-3031-6

Cited by 15 publications

(17 citation statements)

References 24 publications

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“…This suggests that an overflow from the Hammerbach system to the Schmelzbach system is activated when a certain hydrological threshold is crossed. Similar influences of hydrological conditions on flow connections and thus on the relative contributions of allogenic and autogenic flow components have also been reported from other karst systems (e.g., Ravbar et al 2012;Bonacci et al 2013;Terzić et al 2014).…”

Section: Field Sitesupporting

confidence: 76%

Threshold behavior of karst aquifers: the example of the Lurbach karst system (Austria)

2014

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Threshold behavior in hydrological systems generally involves a qualitative change of a single process, the system response or the functioning of the system. Different types of thresholds and their underlying controls are examined using the example of the Lurbach karst system (Austria). This karst system receives allogenic recharge from the sinking stream Lurbach, which under low-flow conditions only resurges at the Hammerbach spring. Yet, under medium-to high-flow conditions an overflow toward another spring, the Schmelzbach outlet occurs. Thresholds in physicochemical spring responses and their underlying controls are identified from the analysis of heat and solute transport processes in karst conduits. Applying this concept to the Hammerbach spring suggests that the threshold controlling the response of the spring water temperature was changed in the time period from 2006 to 2009 relative to the years before. At the same time, changes are observed in the behavior of the spring hydrograph and the discharge threshold at which the overflow to the Schmelzbach system is activated. All of these observations can be consistently explained by a decreased diameter of the conduit pathways within the indicated time period, presumably caused by the redistribution of sediments due to a flood event in 2005. Thus, thresholds in the physicochemical spring response were successfully employed to support the identification of a change in the functioning of the Lurbach karst system, which occurred possibly because a threshold related to the sediment transport within the karst conduits was crossed.

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Section: Field Sitesupporting

confidence: 76%

Threshold behavior of karst aquifers: the example of the Lurbach karst system (Austria)

2014

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“…Water plays a crucial role in this area; allochthonous waters flowing from non-karstic areas enter into the underground almost directly at the geological boundary of the Devonian limestone (Hill and Polyak 2014;Terzic et al 2014).…”

mentioning

confidence: 99%

Detection of mycobacteria in the environment of the Moravian Karst (Bull Rock Cave and the relevant water catchment area): the impact of water sediment, earthworm castings and bat guano

Modrá¹,

Bartoš²,

Hribova³

et al. 2017

Vet. Med.

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ABSTRACT:The presence of mycobacteria was studied in Bull Rock Cave ("Byci skala") and the water catchment area of Jedovnice Brook ("Jedovnicky potok") using direct microscopy after Ziehl-Neelsen (ZN) staining, culture examination and molecular techniques. Mycobacteria were detected in 47.1% of a total of 68 samples. The mycobacterial genes hsp65 and dnaA were detected and sequenced in 37 (74.0%) out of the 50 cave environmental samples and in 10 (55.6%) out of the 18 samples of water catchment sediments. Nine species of slowly growing mycobacteria (M. terrae, M. arupense, M. gordonae, M. lentiflavum, M. parascrofulaceum, M. parmense, M. saskatchewanense, M. simiae and M. xenopi) and two subsp. (M. avium subsp. avium and M. avium subsp. hominissuis) were detected. Fourteen species of rapidly growing mycobacteria (M. chelonae, M. chubuense, M. poriferae, M. flavescens, M. fortuitum, M. porcinum, M. rhodesiae, M. gilvum, M. goodii, M. peregrinum, M. mageritense, M. vanbaalenii, M. gadium and M. insubricum) were detected. The highest mycobacterial presence was documented by ZN staining and/or culture examinations in earthworm castings and bat guano (73.3% positivity out of the 15 samples) in the cave environment and in the water sediments collected under the outflow from the wastewater treatment plants (77.8% positivity out of nine samples). The highest total organic carbon (TOC) was detected in wooden material and earthworm castings with pH values between 5.0 and 7.7 in the cave environment and in water sediments collected under the outflow from the wastewater treatment plants with pH between 5.8 and 7.0. It could be concluded that the karst cave environment with its running surface water contaminated with different microorganisms or chemical substances creates favourable conditions not only for animals (especially earthworms) but also for mycobacteria. This fact is also demonstrated by the presence of these mycobacteria in the cave environment mainly in earthworm castings and bat guano.

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“…The discordance between present-day hydrology and species distribution is particularly pronounced in karstic areas that are drained by networks of underground channels, largely inaccessible to researchers (Lefébure et al, 2006;Zakšek et al, 2007;Bilandžija et al, 2013). Nowhere else are drainage boundaries as difficult to determine as here (Terzić et al, 2014). Nowhere else are drainage boundaries as difficult to determine as here (Terzić et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The hydrogeology of these areas is challenging and complex (Ford and Williams, 2007). Nowhere else are drainage boundaries as difficult to determine as here (Terzić et al, 2014). The water flow is directed by local differences of karst water tables, which fluctuate at various spatial and temporal scales (Bonacci, 1987;Bonacci et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

DNA barcoding sheds light on hidden subterranean boundary between Adriatic and Danubian drainage basins

2016

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In principle, the distribution of freshwater fauna follows the extent of drainage basins, but various historical and concurrent factors weaken this correspondence. Subterranean karstic drainages can be particularly baffling as their boundaries are decoupled from the surface relief and change with the level of the karstic groundwater. We explored how the distribution and genetic structure of cave fauna correlate to data obtained by conventional groundwater tracers in the Danubian-Adriatic divide in the classical Karst between Postojna and Trieste. Here, waters from the Pivka Polje drain to either basin, depending on the water level. This ambiguity is reflected by the distribution of several aquatic cave species that disperse from one drainage to the other. However, using DNA barcoding methods, we found a clear-cut separation between the closely related subterranean aquatic isopods Asellus aquaticus on the Danubian and Asellus kosswigi on the Adriatic side. The boundary between them agrees with the established hydrology at normal water levels. Further phylogeographic and demographic analyses suggest that the superficial concurrent correspondence has a deeper historical component. We inferred that the Adriatic species did not reach its present boundary by recent range dispersal, but rather has remained there as relict from Pleistocene times. Today, dispersal from the lower part of the Adriatic (Reka River) drainage is impossible because of the large altitudinal difference within. These results demonstrate that biological and particularly genetic groundwater tracing have the advantage of being sensitive to both historical and contemporary groundwater connectivity. Figure 4. Cross section of the subterranean Reka River drainage (A) with sampling sites and underlying mitochondrial DNA haplotype network for Asellus kosswigi (B). Haplotype names are explained in Table I. 1310M. KONEC et al.

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Hydrogeological properties of a complex Dinaric karst catchment: Miljacka Spring case study

Cited by 15 publications

References 24 publications

Threshold behavior of karst aquifers: the example of the Lurbach karst system (Austria)

Threshold behavior of karst aquifers: the example of the Lurbach karst system (Austria)

Detection of mycobacteria in the environment of the Moravian Karst (Bull Rock Cave and the relevant water catchment area): the impact of water sediment, earthworm castings and bat guano

DNA barcoding sheds light on hidden subterranean boundary between Adriatic and Danubian drainage basins

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