Supportive methods for assessing effective porosity and regulating karst aquifers

Stevanović, Zoran; Milanović, Saša; Ristic, Vesna

doi:10.3986/ac.v39i2.102

Cited by 27 publications

(11 citation statements)

References 11 publications

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“…Fragility of the karst environment determines high possibility for pollution's rapid transport within karst conduits (Allshorn et al, 2007;Ford and Williams, 2007), with serious problems in recovering a contaminated aquifer to its pre-contamination state (Milanovic, 1981;Kacaroglu, 1999;Stevanovic et al, 2010;Parise et al 2015Parise et al , 2018. In Iran, more than 50 % of salt diapirs in the southern part of the country deteriorate water quality of the surrounding aquifers (Zarei, 2016).…”

Section: Resultsmentioning

confidence: 99%

Combined use of hydrogeological, hydrogeochemical and isotopic techni-ques to identify the impact of a salt

Alemansour¹,

Zareị²

2019

JCKS

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More than 120 exposed salt diapirs in southern Iran are connected to the adjacent aquifers and likely constitute the main sources of groundwater salinization in the region. Located in southern Iran, the Korsia salt diapir is surrounded by alluvial and karst groundwater aquifers. To investigate the impact of the salt body of Korsia on the groundwater quality of surrounding aquifers, electrical conductivity, total dissolved solids and dissolved calcium, magnesium, sodium, potassium, chloride, bromide, and sulfate concentrations were measured at 41 sampling points, including 32 exploitation wells, 7 springs and 2 surface water stations. Additionally, oxygen-18 and deuterium isotopes were analyzed at 7 sampling points to investigate the source of the salinity in the area. Our hydrogeological, hydrogeochemical, and isotopic evaluations show that the Korsia diapir deteriorates groundwater quality of the eastern karst and southern alluvial aquifers through infiltration of a spring's brine into limestone, and flow of the surface brine originated from the diapir, respectively. A karst aquifer west of the diapir is not influenced by the diapir brine because its hydraulic connectivity is interrupted by an impermeable geological formation. Construction of salt basins or diversion of brine is suggested to increase water quality of the surrounding aquifers. These procedures can be applied not only in the Korsia diapir, but also in tens of diapirs of southern Iran as remediation methods to improve water quality of their adjacent aquifers in this arid region.

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Section: Resultsmentioning

confidence: 99%

Combined use of hydrogeological, hydrogeochemical and isotopic techni-ques to identify the impact of a salt

Alemansour¹,

Zareị²

2019

JCKS

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“…(1) featured two unknown quantities: E ij and D ij . As the very first step, daily sums of potential evapotranspiration are derived applying a modified Thornthwaite method (Thornthwaite and Mather 1957;Ristić 2007;Stevanović et al 2010;Ristić et al 2013;Ristić Vakanjac 2015).…”

Section: Methodsmentioning

confidence: 99%

An example of karst catchment delineation for prioritizing the protection of an intact natural area

Vakanjac

Stevanović

Stevanović³

et al. 2015

Environ Earth Sci

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The karstic spring Perućac as the main drainage area of the Tara Mt. in western Serbia was studied in order to assess its discharge regime, water reserves, and to delineate its catchment area. The spring is located in the northeastern, inner zone of the classic Dinaric karst, which is characterized by a dominant extension of highly karstified Triassic limestones, a poorly developed hydrographic network with many ponors, and dense forests. Tara Mt. is one of five national parks in Serbia. The goal of the project was to identify a high-priority protection zone within the preserved natural area which is also well known and actively used for tourism and recreation purposes. Based on data on the discharge regime of the Perućac Spring, and by applying the multiple non-linear correlation method, the size of the direct catchment area was assumed to be 79.3 km 2 , which was 5-18 % larger than that estimated by previous surveys. Proposal to extend preserved natural area and to include sanitary protection zone of the Perućac spring as well as to establish a common monitoring system for biodiversity and water has been made. In this way, not only native plants and animals but also their habitats would be better protected from potential pollution.

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“…Surface drainage network is quite poor, while most of the water flow takes place in the underground. This groundwater flow is determined by local porosity, which is in general estimated to be 3-5% in karstified limestones, while it is usually much lower in dolomitic rocks (Milanović 2004;Stevanović et al 2010). One of the most important features is preferential flow paths, which are often connected with important fault zones, where the rock mass is much more fractured and karstified, as well as through some speleological object: caves, pits, and caverns.…”

Section: Geological Settingsmentioning

confidence: 99%

Conditions for shallow geothermal energy utilization in Dinaric karst terrains in Croatia

2019

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Hydrogeological and thermogeological properties of the shallow subsurface in the Dinaric karst area of Croatia were investigated in the context of its utilization for ground-and water-source heat pumps (GSHPs and WSHPs). The research encompassed four 100 m deep boreholes with GSHP installations in both coastal and inland Dinaric karst (different limestones and evaporitic rocks at one location), and a set of six exploratory boreholes, abstraction and reinjection wells for WSHP heating and cooling using seawater on the coast (fractured and karstified limestones). It was determined that rock thermal conductivities are favourable for GSHP utilization, but dependent on the wider rock mass characteristics which are hard to predict (size of karst voids and their saturation status). In addition, wells with high enough yield and stabile seawater or groundwater temperatures for WSHP utilization can be designed in appropriate structural settings (tensional fractures and fracture set intersections). Advantages and disadvantages of the utilized methodology have been pointed out, as well as methods which should prove useful in the future, especially if larger systems are planned. Hydrogeological, geotechnical, and thermal risks expected during the drilling, installation, and operational phases have also been identified. Presented case studies have given the insight into heat pump installation options and conditions in Croatian part of the Dinarides, but can be useful to other researchers and engineers both in the Dinarides and in similar karst regions. Keywords Dinaric karst • Rock thermal properties • Hydrogeological properties • Heat pumps • Croatia This article is a part of a Topical Collection in Environmental Earth Sciences on Sustainable Management of Karst Natural Resources, guest edited by Drs. Sasa Malinovic and Zoran Stevanovic.

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Supportive methods for assessing effective porosity and regulating karst aquifers

Cited by 27 publications

References 11 publications

Combined use of hydrogeological, hydrogeochemical and isotopic techni-ques to identify the impact of a salt

Combined use of hydrogeological, hydrogeochemical and isotopic techni-ques to identify the impact of a salt

An example of karst catchment delineation for prioritizing the protection of an intact natural area

Conditions for shallow geothermal energy utilization in Dinaric karst terrains in Croatia

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