Articles | Volume 23, issue 5
Hydrol. Earth Syst. Sci., 23, 2321–2338, 2019
https://doi.org/10.5194/hess-23-2321-2019
Hydrol. Earth Syst. Sci., 23, 2321–2338, 2019
https://doi.org/10.5194/hess-23-2321-2019

Research article 14 May 2019

Research article | 14 May 2019

Hydrogeological conceptual model of andesitic watersheds revealed by high-resolution heliborne geophysics

Benoit Vittecoq et al.

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Subject: Groundwater hydrology | Techniques and Approaches: Instruments and observation techniques
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Cited articles

Arnaud, L. and Lanini, S.: Impact du changement climatique sur les ressources en eau de Martinique, Openfile BRGM Report RP-62676-FR, available at: http://infoterre.brgm.fr/rapports//RP-62676-FR.pdf, (last access: 7 May 2019), 2014. 
Auken, E., Christiansen, A. V., Westergaard, J. H., Kirkegaard, C., Foged, N., and Viezzoli, A.: An integrated processing scheme for high-resolution airborne electromagnetic surveys, the SkyTEM system, Explor. Geophys., 40, 184–192, 2009. 
Bogie, I. and Mackenzie, K.: The application of a volcanic facies model to an andesitic stratovolcano hosted geothermal system at Wayang Windu, Java, Indonesia, in: Proceedings 20th NZ Geothermal Workshop, Aukland, 265–270, 1998. 
Boudon, G., Le Friant, A., Komorowski, J.-C., Deplus, C., and Semet, M. P.: Volcano flank instability in the Lesser Antilles Arc: Diversity of scale, processes, and temporal recurrence, J. Geophys. Res., 112, B08205, https://doi.org/10.1029/2006JB004674, 2007. 
Browne, P. R. L.: Hydrothermal alteration as an aid in investigating geothermal fields, Geothermics, 2, 564–570, https://doi.org/10.1016/0375-6505(70)90057-X, 1970. 
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Water resource management on volcanic islands is challenging and faces several issues. Taking advantage of new heliborne geophysical technology, correlated with borehole and spring data, we develop a watershed-scale conceptual model and demonstrate that permeability increases with age for the studied formations. Moreover, complex geological structures lead to preferential flow circulations and to discrepancy between topographical and hydrogeological watersheds, influencing river flow rates.