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dc.contributor.authorGázquez, Fernando-
dc.contributor.authorCalaforra, José María-
dc.contributor.authorFernandez-Cortes, Ángel-
dc.identifierdoi: 10.1016/j.jhydrol.2015.10.059-
dc.identifierissn: 0022-1694-
dc.identifiere-issn: 1879-2707-
dc.identifier.citationJournal of Hydrology 541: Part A 136-145 (2016)-
dc.description.abstractOn 28th September 2012, more than 150 mm rain fell in just two hours in some points of southeastern Spain, triggering intense flash floods that resulted in the death of ten people and widespread material damage. In the gypsum karst of Sorbas, rainfall intensity reached 33 mm/h. Air temperature monitoring in different levels of Covadura Cave, down to 85 m depth, enabled the effect of this extreme episode on the cave microclimate to be evaluated in real time. The cave air temperature increased by between 0.9 and 4.1 °C as a result of water flow into the cavity and intense mixing of air masses, in addition to the displacement of deeper air masses toward shallower levels produced by fast recharge of the surrounding karst aquifer. The lag between peak rainfall intensity and the highest cave air temperature was 5–6 h, indicating the response time of the karst to this rainfall event. No trends with depth were observed, suggesting that water not only flowed in through the main cave entrance but also through secondary accesses and fractures. Furthermore, the size of the cave passages and the intensity of air turbulence generated by waterfalls in the cave played an important role in producing these temperature differences. Even though the rainfall event lasted 10 h, cave air temperature did not return to pre-flash flood values until more than 20 days later. This indicates that, while waterflow through the cave might stop a few hours after the rainfall event, cave air temperature can be affected over a longer period. This can be explained by slow groundwater level decreasing of the surrounding karst aquifer and latent heat liberation produced by moisture condensation on the cave walls. Our results show how continuous monitoring of air temperature in caves can be a useful tool for evaluating the short-term effects of flash floods in subterranean karst systems.-
dc.description.sponsorshipFinancial support was made available through funds from the Water Resources and Environmental Geology Research Group (University of Almería) and the ‘‘GLOCHARID’’ Project (852/2009/M/00) of the Junta de Andalucía Regional Government. Funding was also provided by the People Programme (Marie Curie Actions – Intra-European Fellowships, call 2013) of the European Union’s Seventh Framework Programme (FP7/2007-2013) under REA grant agreement no. 624204 to Dr. Fernández-Cortés.-
dc.subjectCave air monitoring-
dc.subjectFlash floods-
dc.subjectCave microclimate-
dc.subjectGypsum karst-
dc.subjectExtreme event-
dc.titleFlash flood events recorded by air temperature changes in caves: A case study in Covadura Cave (SE Spain)-
dc.description.versionPeer Reviewed-
dc.contributor.funderUniversidad de Almería-
dc.contributor.funderJunta de Andalucía-
dc.contributor.funderEuropean Commission-
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