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Volume 51, Issue 2 (2022)

Articles

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Hydrodynamic model for independent cold and thermo-mineral twin springs in a stratified continental karst aquifer, Camou, Arbailles Massif, Pyrénées, France
Philippe Audra, Jean-Yves Bigot, Dimitri Laurent, Nathalie Vanara, Didier Cailhol, and Gérard Cazenave

  • Camou twin springs discharge cold and hot-saline waters, from distinct water bodies
  • We studied the dynamic of thermohaline using temperature-depth dataloggers
  • Water bodies with different physic characteristic do not mix, even in same conduit
  • We suggest a hydrodynamic model for non-mixing in highly karstified context
  • Camou springs are an outstanding case of continental stratified karst aquifer

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Recreational caving impacts of visitors in a high-altitude cave in Bolivian Andes: main effects on microhabitat structure and faunal distribution
Lais Furtado Oliveira, Rodrigo L. Ferreira, Jaime Iván Rodríguez Fernández, and Marconi Souza Silva

  • Humajalanta cave presented 32 invertebrate species, six of them troglomorphic
  • The species composition between visited and non-visited areas differed significantly
  • Singular components of microhabitat determined the similarity of the non-troglobitic fauna
  • Microhabitat heterogeneity determined the non-troglobite species richness
  • Impacts of weak visitation did not determine faunal differentiation between areas

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Sulfuric acid speleogenesis and surface landform evolution along the Vienna Basin Transfer Fault: Plavecký Karst, Slovakia
Pavel Bella, Helena Hercman, Šimon Kdýr, Petr Mikysek, Petr Pruner, Juraj Littva, Jozef Minár, Michal Gradzinski, Wojciech Wróblewski, Marek Velšmid, and Pavel Bosak

  • Multi-phased hypogene speleogenesis occured at the fault interface of a horst-graben structure
  • Sulfuric acid speleogenesis is identified by morphological and mineralogical evidence
  • Cave levels are featured by flat corrosion floors and fissure discharge feeders
  • Formation of cave levels is linked to the subsidence history of the Vienna Basin
  • U-series dating and paleomagnetic analysis of Early–Middle Pleistocene deposits were conducted

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Empirical roughness coefficients for moderate floods in an open conduit cave: Fullers stream canyon, Culverson Creek Cave System, West Virginia
Lydia T. Albright and Gregory S. Springer

  • Open-conduit Mannings roughness coefficients were empirically determined
  • Head losses were measured using instruments recording water stages
  • Roughness was inversely proportional to discharge in the cave stream
  • Roughness coefficients are highest amid breakdown
  • Lowest roughness values were for cobble-floored canyon passages

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Absence of visitors during lockdown reveals natural variation in carbon dioxide level in the Glowworm Cave, Waitomo, New Zealand
David J. Merritt, Chris Hendy Dr, and Shannon Corkill Ms

  • We assess the natural microclimate of the cave over 60 days with no visitation
  • Visitors increased the cave temperature but the effect was short-lived due to cave ventilation
  • During lockdown, the usual daily increase in carbon dioxide due to visitors was absent
  • The partial pressure of carbon dioxide level naturally lies above the external atmospheric levels
  • Rain and flood events led to increases in carbon dioxide partial pressure