Contribution of Tracers for Understanding the Hydrodynamics of Karstic Aquifers Crossed by Allogenic Rivers, Spain

Rosales, Rafael Segovia; Pérez, Eugenio Sanz; Pidal, Ignacio Menéndez

doi:10.5772/22093

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…The hydrograph of Fuentetoba Spring was analyzed. Tracer tests can be done (for example, Käss, W, 1998;Geyer et al, 2007;Benischke et al, 2007;Perrin and Luetscher, 2008;Goldscheider et al, 2008;Segovia et al, 2011) to characterize local hydrogeological properties, such as the possible effect of siphoning or lags in flow. In the case of Fuentetoba Spring, three tracer tests were performed in 2012 and 2013 during low-water periods that were followed by recharge events, using uranine, together with point injections of NaCl.…”

Section: Methodsmentioning

confidence: 99%

“…3). A characteristic of the large springs of the Upper Cretaceous aquifers in this zone is the presence of phreatic conduits associated with them; the spring at Fuentona de Muriel emerges from a conduit that is more than 110 m deep and 400 m long (Sanz Pérez and Medina Ferrer, 1987), the spring at La Galiana flows from a conduit with some 400 m exploredlength (Segovia et al, 2011), and the Fuente Azul de San Pedro de Arlanza in Burgos emerges from a vertical phreatic conduit more than 100 m deep.…”

Section: Caves Submerged Conduits and Subterranean Riversmentioning

confidence: 99%

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Drainage and siphoning of a karstic spring: a case study

Sanz¹,

Rosas²,

Pidal³

2016

JCKS

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The Fuentetoba Spring, with a mean flow of 210 L s À1 , releases the discharge from an aquifer that comprises three hydraulically-connected synclines. The spring has a very irregular flow of between 8 L s À1 and 3,400 L s À1 due to the predominant water circulation that is non-Darcian turbulent flow as an underground torrent in the vadose zone, as well as through well-developed karstic conduits in the phreatic and epiphreatic zones, as attested to by speleological explorations. The long response times to recharge by the Fuentetoba karstic system, seen in the spring's hydrograph, are controlled by regional factors. Nevertheless, certain responses that have very long time lags under high water conditions might be governed in the final stretch of the flowpath by mechanisms of pressure or siphoning of the floodwave, and perhaps by constrictions or plugs of sediment in the conduits.

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Section: Methodsmentioning

confidence: 99%

Section: Caves Submerged Conduits and Subterranean Riversmentioning

confidence: 99%

Drainage and siphoning of a karstic spring: a case study

Sanz¹,

Rosas²,

Pidal³

2016

JCKS

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“…It was not known if it behaved only as a losing stream along its entire length, nor what the infiltration capacity of its river bed was. Tracing studies were required to elucidate the hydraulic connection between the rivers and the aquifer (Segovia et al, 2011) [11].…”

Section: Open Accessmentioning

confidence: 99%

Interaction between karstic aquifers and allogenic rivers: The aquifer of the national park of the ephemeral river Lobos Canyon (Spain)

Pérez¹,

Pidal²,

Rosales³

2013

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A methodology is described for understanding the interaction of karstic aquifers with allogenic rivers, where little information is available. This methodology includes conventional hydrogenology methods tracer tests and measurements of flow into, out of and circulating within the karstic system. The method is designed to understand the hydrogeological behaviour of a river in sufficient detail, given a short study period. The methodology is applied to a karstic system in Spain, obtaining useful, quantitative results for a hydrological year, such as an estimate of the water balance, differentiation between autogenic and allogenic natural recharge, relationship and connection between the river and the aquifer, and measurements of infiltration capacity in watercourses under different hydrological situations. The paper deals with a useful example that could be applied to other rivers and aquifers where few data are available. It can be applied to aquifers under a natural regime and Mediterranean climate.

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