Delineation of discrete conduit networks in karst aquifers via combined analysis of tracer tests and geophysical data
-
Published:2022-04-01
Issue:6
Volume:26
Page:1713-1726
-
ISSN:1607-7938
-
Container-title:Hydrology and Earth System Sciences
-
language:en
-
Short-container-title:Hydrol. Earth Syst. Sci.
Author:
Bodin JacquesORCID, Porel Gilles, Nauleau Benoît, Paquet Denis
Abstract
Abstract. Assessment of the karst network geometry based on field data is an important challenge in the accurate modeling of karst aquifers. In this study, we propose an integrated approach for the identification of effective three-dimensional (3D) discrete karst conduit networks conditioned on tracer tests and geophysical data. The procedure is threefold: (i) tracer breakthrough curves (BTCs) are processed via a regularized inversion procedure to determine the minimum number of distinct tracer flow paths between injection and monitoring points, (ii) available surface-based geophysical data and borehole-logging measurements are aggregated into a 3D proxy model of aquifer hydraulic properties, and (iii) single or multiple tracer flow paths are identified through the application of an alternative shortest path (SP) algorithm to the 3D proxy model. The capability of the proposed approach to adequately capture the geometrical structure of actual karst conduit systems mainly depends on the sensitivity of geophysical signals to karst features, whereas the relative completeness of the identified conduit network depends on the number and spatial configuration of tracer tests. The applicability of the proposed approach is illustrated through a case study at the Hydrogeological Experimental Site (HES) in Poitiers, France.
Publisher
Copernicus GmbH
Subject
General Earth and Planetary Sciences,General Engineering,General Environmental Science
Reference78 articles.
1. Arslan, H. and Manguoglu, M.: A parallel bio-inspired shortest path
algorithm, Computing, 101, 969–988, https://doi.org/10.1007/s00607-018-0621-x, 2019. 2. Audouin, O., Bodin, J., Porel, G., and Bourbiaux, B.: Flowpath structure in
a limestone aquifer: multi-borehole logging investigations at the hydrogeological experimental site of Poitiers, France, Hydrogeol. J., 16,
939–950, https://doi.org/10.1007/s10040-008-0275-4, 2008. 3. Barberá, J. A., Mudarra, M., Andreo, B., and De la Torre, B.: Regional-scale analysis of karst underground flow deduced from tracing
experiments: examples from carbonate aquifers in Malaga province, southern
Spain, Hydrogeol. J., 26, 23–40, https://doi.org/10.1007/s10040-017-1638-5, 2018. 4. Bechtel, T. D., Bosch, F. P., and Gurk, M.: Geophysical methods, in: Methods
in Karst Hydrogeology, Taylor & Francis/Balkema, Leiden, the Netherlands,
171–199, ISBN 13 978-0-415-42873-6 (HB), ISBN 978-0-20393462-3, 2007. 5. Binley, A., Hubbard, S. S., Huisman, J. A., Revil, A., Robinson, D. A., Singha, K., and Slater, L. D.: The emergence of hydrogeophysics for improved
understanding of subsurface processes over multiple scales, Water Resour.
Res., 51, 3837–3866, https://doi.org/10.1002/2015WR017016, 2015.
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|