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Speleology in Kazakhstan

Shakalov on 11 Jul, 2012
Hello everyone! I pleased to invite you to the official site of Central Asian Karstic-Speleological commission ("Kaspeko")   There, we regularly publish reports about our expeditions, articles and reports on speleotopics, lecture course for instructors, photos etc Also we have forum there. ...

New publications on hypogene speleogenesis

Klimchouk on 26 Mar, 2012
Dear Colleagues, This is to draw your attention to several recent publications added to KarstBase, relevant to hypogenic karst/speleogenesis: Corrosion of limestone tablets in sulfidic ground-water: measurements and speleogenetic implications Galdenzi,

The deepest terrestrial animal

Klimchouk on 23 Feb, 2012
A recent publication of Spanish researchers describes the biology of Krubera Cave, including the deepest terrestrial animal ever found: Jordana, Rafael; Baquero, Enrique; Reboleira, Sofía and Sendra, Alberto. ...

Caves - landscapes without light

akop on 05 Feb, 2012
Exhibition dedicated to caves is taking place in the Vienna Natural History Museum   The exhibition at the Natural History Museum presents the surprising variety of caves and cave formations such as stalactites and various crystals. ...

Did you know?

That structure is one of the larger features of a rock mass (e.g., bedding, foliation, jointing, cleavage, brecciation, etc.). also the sum total of such features as contrasted with texture. in a broader sense, it refers to the structural features of an area such as anticlines or synclines.?

Checkout all 2699 terms in the KarstBase Glossary of Karst and Cave Terms

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A new web site on hypogenic caves of Murcia (Spain)
A new web site dedicated to hypogenic caves of Murcia
Welcome to Karstology doctoral study
The Karstology doctoral study program is a world-wide unique program which provides a comprehensive study of karst science, combining the study of the karst landscape, karst caves, karst hydrogeology, biology and ecology of karst in one course of study.
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Speleology of Georgia
Speleological Society of Georgia is created.
Speleology of Georgia
Dear colleagues, I would like to inform you that Speleological Society of Georgia was created in the Republic of Georgia By following a link below you can read interesting information about speleology of Georgia https://speleologygeorgiawordpresscom/. ...

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Did you know?

That rising is 1. the resurgence of an underground watercourse, usually at the base margin of the calcareous massif, although in the instance of a blind valley the rising has eroded headwards for some distance. each rising accounts for the collective discharge of several sinks and in this way has a relatively high discharge as the sole drainage outlet for a large area. if the water issues freely, the rising is said to be free-flowing, but if it issues under pressure, the terms artesian, forced, or vauclusian spring are used (after the typeexample of the resurgence of the sorgue river at vaucluse in france) [19]. 2. an issue of water from massive limestone which cannot be classed with certainty as either a resurgence or a spring [20]. synonyms: (french.) emergence; (german.) ausflubtelle, karstquelle; (greek.) kephalari; (italian.) sorgente; (russian.) vyhod karstovyh vod; (spanish.) emergencia; (turkish.) yuzeye yukselis; (yugoslavian.) krsko vrelo, krski izvor, obrh. see also emergence; exsurgence; resurgence.?

Checkout all 2699 terms in the KarstBase Glossary of Karst and Cave Terms

Featured articles from Cave & Karst Science Journals
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Featured articles from other Geoscience Journals
Sulphuric acid speleogenesis and landscape evolution: Montecchio cave, Albegna river valley (Southern Tuscany, Italy), Piccini, Leonardo; De Waele, Jo; Galli, Ermanno; Polyak, Victor J.; Bernasconi, Stefano M., Asmerom, Yemane
The role of condensation in the evolution of dissolutional forms in gypsum caves: Study case in the karst of Sorbas (SE Spain), Gazquez, Fernando; Calaforra, José Maria; Forti, Paolo; De Waele, Jo; Sanna, Laura
Genesis of folia in a non-thermal epigenic cave (Matanzas, Cuba), D'Angeli, Ilenia Maria; De Waele, Jo; Ceballo Melendres, Osmany; Tisato, Nicola; Sauro, Francesco; Grau Gonzalez, Esteban Ruben; Bernasconi, Stefano; Torriani, Stefano; Bontognali, Tomaso Renzo Rezio
See all featured articles from other geoscience journals

Featured article from geoscience journal

Elsevier
Journal of Hydrology, 2010, Vol 389, Issue 3, p. 260-275
Effects of Karst and geological structure on groundwater flow: The case of Yarqon-Taninim Aquifer, Israel
Abstract:

This study demonstrates the significant influences of the geological structure (especially folding and lithology) and the karst system on groundwater flow regime. Folds divert groundwater flow from the general hydraulic gradient; marly layers sustain several perched sub-aquifers above the regional aquifer; and karstification increases the hydraulic conductivity by several orders of magnitude. These phenomena are quantitatively demonstrated within the Yarqon-Taninim (YT) basin, Israel, which is a complex groundwater system, combining several (extremely) opposite characteristics: humid and arid recharge zones, phreatic and confined parts, shallow and deep sub-aquifers, stratified and relatively-homogeneous sub-basins, saline and fresh water bodies, as well as stagnant and fast-flowing groundwater regions.

We have introduced a 3D geological-based grid for the basin (for the first time). It was implemented into a numerical code (FEFLOW), which was used thereafter to analyze quantitatively the flow regime, the groundwater mass balance, and the aquifer hydraulic properties. We present up to date conceptual understanding and numerical modeling of the YT flow field, especially at its mountainous parts.

Based on the calibration procedure and the sensitivity analyses, we obtained the best-fitted hydraulic conductivity values for the aquifer mesh. The general phenomenon observed is that as groundwater flow quantity increases, the hydraulic conductivity also increases. We interpret this result by the karstification mechanism (including paleo-karst). Thus, where groundwater flow-lines converge and where groundwater discharge amount increases, the karstification process intensifies and permeability increases. Consequently, at the mountainous region, along the syncline axes, where groundwater flow-lines converge, higher conductivities are found.

Modeling results also exhibit that at the lowland confined area, the geological structure does not play a major role in directing groundwater flow. Rather, the flow field is controlled by the well-developed karst system and the relatively homogenous carbonate section. It is hypothesizes that the extensive karstification took place at the Messinian Salinity Crises, 5.5 Ma, during which groundwater heads as well as sea level were lowered by several 100 m.