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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. ...

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. ...

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. ...

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 closed traverse is a traverse which begins and ends at survey points with known co-ordinates and orientation or at the same point [25].?

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

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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.
Engineering challenges in Karst, Stevanović, Zoran; Milanović, Petar
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Featured articles from other Geoscience Journals
Geochemical and mineralogical fingerprints to distinguish the exploited ferruginous mineralisations of Grotta della Monaca (Calabria, Italy), Dimuccio, L.A.; Rodrigues, N.; Larocca, F.; Pratas, J.; Amado, A.M.; Batista de Carvalho, L.A.
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
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Water Resources Research/WATER RESOURCES RESEARCH, 2011, Vol 47, p. 1-19
Effects of dynamically variable saturation and matrix-conduit coupling of flow in karst aquifers
Abstract:

Well-developed karst aquifers consist of highly conductive conduits and a relatively  low permeability fractured and/or porous rock matrix and therefore behave as a dualhydraulic  system. Groundwater flow within highly permeable strata is rapid and transient  and depends on local flow conditions, i.e., pressurized or nonpressurized flow. The  characterization of karst aquifers is a necessary and challenging task because information  about hydraulic and spatial conduit properties is poorly defined or unknown. To investigate  karst aquifers, hydraulic stresses such as large recharge events can be simulated with hybrid  (coupled discrete continuum) models. Since existing hybrid models are simplifications of  the system dynamics, a new karst model (ModBraC) is presented that accounts for unsteady  and nonuniform discrete flow in variably saturated conduits employing the Saint-Venant  equations. Model performance tests indicate that ModBraC is able to simulate (1) unsteady  and nonuniform flow in variably filled conduits, (2) draining and refilling of conduits with  stable transition between free-surface and pressurized flow and correct storage  representation, (3) water exchange between matrix and variably filled conduits, and (4)  discharge routing through branched and intermeshed conduit networks. Subsequently,  ModBraC is applied to an idealized catchment to investigate the significance of free-surface  flow representation. A parameter study is conducted with two different initial conditions:  (1) pressurized flow and (2) free-surface flow. If free-surface flow prevails, the systems is  characterized by (1) a time lag for signal transmission, (2) a typical spring discharge pattern  representing the transition from pressurized to free-surface flow, and (3) a reduced conduitmatrix  interaction during free-surface flow.