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Speleology in Kazakhstan

Shakalov on 04 Jul, 2018
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. ...

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 pore pressure is the pressure of water in pores of a saturated medium [16].?

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KarstBase a bibliography database in karst and cave science.

Featured articles from Cave & Karst Science Journals
Chemistry and Karst, White, William B.
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Featured articles from other Geoscience Journals
Karst environment, Culver D.C.
Mushroom Speleothems: Stromatolites That Formed in the Absence of Phototrophs, Bontognali, Tomaso R.R.; D’Angeli Ilenia M.; Tisato, Nicola; Vasconcelos, Crisogono; Bernasconi, Stefano M.; Gonzales, Esteban R. G.; De Waele, Jo
Calculating flux to predict future cave radon concentrations, Rowberry, Matt; Marti, Xavi; Frontera, Carlos; Van De Wiel, Marco; Briestensky, Milos
Microbial mediation of complex subterranean mineral structures, Tirato, Nicola; Torriano, Stefano F.F;, Monteux, Sylvain; Sauro, Francesco; De Waele, Jo; Lavagna, Maria Luisa; D’Angeli, Ilenia Maria; Chailloux, Daniel; Renda, Michel; Eglinton, Timothy I.; Bontognali, Tomaso Renzo Rezio
Evidence of a plate-wide tectonic pressure pulse provided by extensometric monitoring in the Balkan Mountains (Bulgaria), Briestensky, Milos; Rowberry, Matt; Stemberk, Josef; Stefanov, Petar; Vozar, Jozef; Sebela, Stanka; Petro, Lubomir; Bella, Pavel; Gaal, Ludovit; Ormukov, Cholponbek;
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Your search for ghyben-herzberg (Keyword) returned 4 results for the whole karstbase:
Hydrogeological investigations in northwestern Yucatan, Mexico, using resistivity surveys, 1996, Steinich B. , Marin L. E. ,
Eight Schlumberger soundings and four Wenner anisotropy measurements were conducted in the northwestern section of the Yucatan Peninsula for hydrogeological investigations of a karst aquifer. This system is influenced by a circular high permeability zone (Ring of Cenotes) probably related to the Chicxulub Impact Crater. Schlumberger soundings and Wenner anisotropy measurements show that the karst aquifer can be modeled as an electrically anisotropic medium. Anisotropy is related to preferential permeability directions channeling ground-water flow within the aquifer. Directions of maximum permeability were determined using Wenner anisotropy measurements. Electrical soundings were conducted at different sites near the Ring of Cenotes. Resistivity values decrease toward the Ring of Cenotes supporting the hypothesis that selected segments of the Ring have high permeability. Several soundings were conducted in order to study lateral permeability variations along the Ring. A high permeability section can be identified by low resistivity models and is related to a zone of high cenote density. A low permeability section of the Ring was found showing high resistivity models. This zone overlaps with an area of low cenote density. Electrical soundings were used to determine the depth of the fresh-water lens; the interface was detected along two profiles perpendicular and parallel to the Ring of Cenotes resulting in a depth that ranged from 18 m near the coast up to 110 m in the southeastern part of the study area. The predicted depths of the interface using electrical methods showed a good correlation with Ghyben-Herzberg and measured interface depths at some sites. Discrepancies between calculated and interpreted interface depths at two sites may be explained by horizontal-to-vertical permeability anisotropy

Sea water intrusion in coastal karst springs: Example of the Blaz spring (Croatia), 1997, Bonacci O, Rojebonacci T,
Brackish karst springs are common along every karstic sea shore consisting of limestone and dolomite. On the Croatian sea coast there are more than 300 permanent or temporary brackish karst springs. From the standpoint of water supply, the problem of karst spring water salinization is quite significant because large quantities of high quality fresh water are not available to be used either as drinking water or for industrial and agricultural purposes. The salinity of brackish karst springs situated along the Adriatic coast varies from 10 to more than 18 000 mg Cl 1(-1) with an unfavourable distribution during the year. In the wet winter period, when water quantities in the region are abundant, the salinity is exceedingly low. In the warm and dry summer period the chloride concentration is high. At that season, when a shortage of flesh water in the region occurs, especially due to tourism, karst spring water is so salty that it cannot be used at all. The mechanism of sea water intrusion is relatively well known but the problem of karst springs desalinization has not been solved in practice. The Ghyben-Herzberg relationship is formulated exclusively on the basis of hydrostatic equilibrium, and its use under dynamic conditions is limited. The dynamics of fresh water circulation towards karst spring exits are very specific for each individual spring. Using numerous hydrological, hydrometric, hydrogeological and speleological investigations of the brackish Blaz (Croatia) karst spring, this paper gives the plausible position and dimensions of the main karst conduits through which sea water penetrates into the spring exit

Aspects hydrogologiques du Yucatan (Mexique), 1999, Thomas, Christian
The submersed karsts also know as plain karsts are highly developed in the Yucatan peninsula. Cave diving explo_rations, physical and chemical measu_rements (water discharge, chemical analysis of the water, water table altitu_de, a.s.o) allow an indirect estimation of the main hydrogeological parameters of these karsts: infiltration ratio, fresh water reserves, pollution by the salty water, tide influence, karstic erosion... Comparisons are given with other karsts: Lifou (French New-Caledonia) and Nullarbor.

Conduit hydrogeology of a tropical coastal carbonate aquifer. MSc thesis, 1999, Beddows, P. A

The aim of this study is to investigate the hydrogeology of the submerged conduit systems of a coastal carbonate aquifer (Caribbean coast, Yucatan Peninsula, Mexico), and thereby better understand their significance as large permeability heterogeneities. A complex spatial trend in conduit flow rates (determined by quantitative fluorescent dye tracing initiated 6 km inland) was found, including significant velocity variation between consecutive conduit segments. Elevated coastal velocities under low tide conditions are shown by salinity profiling, to be induced by the volumetric increase of discharging water from mixing with marine water. Semi-diurnal micro-tidal loading is sufficient to induce flooding from the sea into the conduits at one coastal discharge point, and significantly reduce flow rates at another. Furthermore, a network of four observation sites extending 5 km inland indicates efficient propagation of the ~0.30 m tidal signal through the Nohoch Nah Chich conduit system, a distance several time greater than previously appreciated in this environment. The field results clearly indicate that the hydrogeological flux is dominated by cavernous porosity, and that the aquifer is dynamically responsive to the high-frequency low-magnitude tidal loading to a significant distance inland. Conventional coastal groundwater models such as the Ghyben-Herzberg lens model, assume isotropic homogeneous equivalent-porous-medium conditions. Because the corollaries of the conventional models are inconsistent with the field evidence, they are inapplicable in this environment. It is hoped that these results will aid future modelling efforts, and improve our capacity to manage the valuable groundwater resources which represents the unique source of potable water to the local population.

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