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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Short summary
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.