Hydrogeological Significance of Secondary Terrestrial Carbonate Deposition in Karst Environments

Banks, Vanessa; Jones, Peter F.

doi:10.5772/29300

Cited by 5 publications

(2 citation statements)

References 99 publications

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“…13A and B) precipitates in the form of Aragonite, as it has been observed also in some wells of Pica. Calcium carbonate precipitation is a result of the degasification of excess dissolved carbon dioxide in groundwater when it seeps from the aquifer into the empty gallery (Banks and Jones, 2012). Additionally, in five socavones, a sedimentation of manganese oxide (MnO) has been observed on the walls, floor and sometimes ceiling of the tunnel.…”

Section: Geological and Hydrogeological Study Of The Socavonesmentioning

confidence: 99%

Exploration, mapping and characterization of filtration galleries of the Pica Oasis, northern Chile: A contribution to the knowledge of the Pica aquifer

Lictevout¹,

Abellanosa²,

Maass

et al. 2020

andgeo

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In arid areas, the efficient management of scarce water resources is key for population survival and development. One of the oldest and greatest ancient water management system in drylands is the filtration gallery. Originated from ancient Persia, they were spread to other regions and cultures, and are found in the oasis of Pica, in the Atacama Desert. A filtration gallery consists of an almost horizontal tunnel dug underground until it reaches a water-bearing zone. It allows to tap and drains out groundwater, and thus a direct contact with groundwater table. With the objective to understand groundwater processes, preserve the water and geoheritage of one of the driest places on Earth and improve land-use planning, the present work explored and studied the filtration galleries, locally called socavones, of the oasis of Pica. Through direct exploration, topographical survey and geo-electrical prospection, 24 socavones were identified, mapped and their main physical features described, showing common traits with filtration galleries described worldwide, but also proper features highlighting their originality. The findings of the geological and hydrogeological studies of the socavones, complemented by physical and chemical analysis, allow to identify new groundwater recharge processes and, thus, to review and complete the hydrogeological model of the local aquifer of Pica. Most socavones are abandoned today, owing to physical and socioeconomic changes. Nevertheless, this study concludes that they can still have a role to play in the groundwater management of this arid area.

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Section: Geological and Hydrogeological Study Of The Socavonesmentioning

confidence: 99%

Exploration, mapping and characterization of filtration galleries of the Pica Oasis, northern Chile: A contribution to the knowledge of the Pica aquifer

Lictevout¹,

Abellanosa²,

Maass

et al. 2020

andgeo

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“…The IAH Commission Prominent features of karst hydrogeology include difficulty in identifying flow paths and variable fluctuations in flow rates [8][9][10]. Furthermore, the hydrologic properties and flow patterns of groundwater and surface water in the carbonate regions have not yet been clearly identified, due to the heterogeneous and complex petrological properties of carbonate rocks [11][12][13][14][15][16]. Therefore, it is difficult to evaluate, predict and manage groundwater flow and pollutant movement in these regions.…”

Section: Introductionmentioning

confidence: 99%

Spatial Variations in Microbial Compositions in a Karst Critical Zone in Samcheok, Republic of Korea

et al. 2020

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The effects of the unpredictability of the flow system in a karst area, with respect to bacterial communities in the aquatic environment, were evaluated. Bacterial communities from two different types of flow conditions (spring and sinkhole) were characterized and compared in the karst area. Proteobacteria, Bacteroidetes, and Verrucomicrobia were the major phyla present in the sampled spring and sinkhole waters. The water samples from the spring points were heavily loaded with Actinobacteria, especially Firmicutes, which accounted for 4.3% of the bacterial content. Furthermore, Actinobacteria were prevalent in some water samples, serving as indicators of the effects of seawater inundation. The richness and diversity of bacterial species were evaluated at the spring and sinkhole water points. The spring waters showed a higher bacterial richness and diversity compared to the sinkhole waters. Our results provide valuable information for the evaluation and investigation of microbial compositions in karst areas, which are characterized by heterogeneous hydrological conditions. The microbial species in karst areas are already exposed to changing hydrogeological conditions, and are likely to be confronted with future changes; thus, their spatiotemporal variations reflect the shifting baselines of physicochemical and ecosystem processes.

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RETRACTED ARTICLE: Petrophysical characterization and durability aspects of tufa rocks at Kurkur Oasis, Western Desert, Egypt

Aal

Salah

Aly

2021

Bull Eng Geol Environ

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Hydrogeological Significance of Secondary Terrestrial Carbonate Deposition in Karst Environments

Cited by 5 publications

References 99 publications

Exploration, mapping and characterization of filtration galleries of the Pica Oasis, northern Chile: A contribution to the knowledge of the Pica aquifer

Exploration, mapping and characterization of filtration galleries of the Pica Oasis, northern Chile: A contribution to the knowledge of the Pica aquifer

Spatial Variations in Microbial Compositions in a Karst Critical Zone in Samcheok, Republic of Korea

RETRACTED ARTICLE: Petrophysical characterization and durability aspects of tufa rocks at Kurkur Oasis, Western Desert, Egypt

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