Interaction between karstic aquifers and allogenic rivers: The aquifer of the national park of the ephemeral river Lobos Canyon (Spain)
- 1 Applied Geology Laboratory, Civil Engineering Higher Technical School, Polytechnic University of Madrid, Madrid, Spain;
- 2 Applied Geology Laboratory, Civil Engineering Higher Technical School, Polytechnic University of Madrid, Madrid, Spain;
- 3 Applied Geology Laboratory, Civil Engineering Higher Technical School, Polytechnic University of Madrid, Madrid, Spain;
Abstract
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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