Rethinking groundwater age | Nature Geoscience

Rethinking groundwater age | Nature Geoscience

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It is commonly thought that old groundwater cannot be pumped sustainably, and that recently recharged groundwater is inherently sustainable. We argue that both old and young groundwaters can


be used in physically sustainable or unsustainable ways.


This research was supported by a Global Water Futures grant to G.F. and J.C.M. and an NSERC Discovery Grant to G.F. J.C.M acknowledges funding received as a Fellow of the CIFAR Earth4D


Subsurface Science and Exploration Program. M.O.C. acknowledges support under an Independent Research Fellowship from the UK Natural Environment Research Council (NERC; NE/P017819/1). This


commentary benefitted from discussions with P. Döll, J. Famiglietti, G. Fogg, X. Huggins, A. Manning, K. Markovich and M. Rohde.


Civil, Geological and Environmental Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada


School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan, Canada


Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, USA


School of Earth and Ocean Sciences & Water Research Institute, Cardiff University, Cardiff, UK


Connected Waters Initiative Research Centre, University of New South Wales, Sydney, New South Wales, Australia


Department of Geosciences, University of Arkansas, Fayetteville, AR, USA


Department of Civil Engineering, University of Victoria, Victoria, British Columbia, Canada


School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, Canada


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