# TIME2WATCH: une approche interdisciplinaire pour une meilleure estimation de la ressource en eau dans les Chyulu Hills (Kenya)

Julie Albaric, Yael Barre-Rolland, Hélène Celle, Stéphanie Gautier, Yani Gunnell, Jean-Christophe Ianigro, Ian Kaniu, Jacques Marteau, Agnes Mbugua, François Mialhe, et al.

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## ► To cite this version:

Julie Albaric, Yael Barre-Rolland, Hélène Celle, Stéphanie Gautier, Yani Gunnell, et al. TIME2WATCH: une approche interdisciplinaire pour une meilleure estimation de la ressource en eau dans les Chyulu Hills (Kenya). Réunion des Sciences de la Terre, Oct 2025, Montpellier, France. . hal-05459493

HAL Id: hal-05459493

https://hal.science/hal-05459493v1

Submitted on 4 Feb 2026

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Géo
sciences
Montpellier

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CHRONO
ENVIRONNEMENT

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LPNHE
PARIS

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iP'2i
LES 2 INFINIS
LYON

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Albaric Julie, Barre-Rolland Yael, Celle Hélène, Gautier Stéphanie, Gunnell Yani, lanigro Jean-Christophe, Kaniu Ian, Marteau Jacques, Mbugua Agnes, Mialhe François, Murunga Patrick, Navratil Oldrich, Nevers Pierre, Olaka Lydia, Roos Lydia, Tiberi Christel, Tramontini Matias, Waga Dennis

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Context:

The Chyulu Hills and Mzima Springs:

* A volcanic region that serves as a water tower for the surrounding area, extending to the city of Mombasa.

* Impact of climate change

* Economic, social, and agricultural challenges.

Scientific goals:

Long-term observations for understanding
the hydrological system of the Chyulu Hills

Strategies for the future management of
water resources.

* A highly interdisciplinary project involving geosciences, hydrogeosciences, physics, and geography.

* A bilateral project between French and Kenyan partners.

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Muography and density estimation of
the volcanic edifice.

Gravimetry and mass distribution at depth

<figure><img src="image_14.png" /><figcaption>Bouguer Anomaly Map</figcaption></figure>

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Environmental seismology

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CLIMATOLOGY
Recharge

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Rock sampling (mineralogy) and
petrophysics (density, porosity, ...)

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Groundwater characterization

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Old water mixes with
new water along its
circulation pathway.

Model combining
exponential and piston
flow model.

Surface water description and land use mapping

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GEOLOGY, GEOCHEMISTRY

K, η, water saturation of scoria cones

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REMOTE SENSING
FIELD SURVEY

Landuse
landcover
change

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PLANT BIOLOGY

Palaeoclimatic
reconstruction

Regional water use

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Local water use

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