Please use this identifier to cite or link to this item:
Title: Contribution of isotopic research techniques to characterize highmountain-Mediterranean karst aquifers: The Port del Comte (Eastern Pyrenees) aquifer.
Author: Herms, I.
Jódar, Jorge
Soler i Gil, Albert
Vadillo, Iñaki
Lambán Jiménez, Luis Javier
Martos-Rosillo, S.
Núñez, J.A.
Arnó, G.
Jorge, J.
Keywords: Carst
Pirineu català (Catalunya)
Catalonian pyrenees (Catalonia)
Issue Date: 21-Mar-2019
Publisher: Elsevier B.V.
Abstract: Water resources in high mountain karst aquifers are usually characterized by high rainfall, recharge and discharge that leads to the sustainability of the downstream ecosystems. Nevertheless, these hydrological systems are vulnerable to the global change impact. The mean transit time (MTT) is a key parameter to describe the behavior of these hydrologic systems and also to assess their vulnerability. This work is focused on estimating MTT by using water stable isotopes in the framework of high-mountain karst systems with a very thick unsaturated zone (USZ). To this end, it is adapted to alpine zones an existing methodology that combines in a row a semi-distributed rainfall-runoff model used to estimate recharge time series, and a lumped-parameter model to obtain  through a convolution integral. The methodology has been applied to the Port del Comte Massif (PCM) hydrological system (Southeastern Pyrenees, NE Spain), a karst aquifer system with an overlying1000 m thick USZ. Six catchment areas corresponding to most important springs of the system are considered. The obtained results show that hydrologically the behavior of the system can be described by an exponential flow model (EM), with MTT ranging between 1.9 and 2.9 years. These values are shorter than those obtained by considering a constant recharge rate along time, which is the easiest and most applied aquifer recharge hypothesis when estimating  through lumped-parameter models. This methodology can be useful to improve the characterization and understanding of other high mountain karst aquifers with an overlying thick USZ that are common in many alpine zones elsewhere the globe.
Note: Versió postprint del document publicat a:
It is part of: Science of the Total Environment, 2019, vol. 656, p. 209-230
Related resource:
ISSN: 0048-9697
Appears in Collections:Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

Files in This Item:
File Description SizeFormat 
683378.pdf6.03 MBAdobe PDFView/Open

This item is licensed under a Creative Commons License Creative Commons