Sélection du moment:
Veille 2.1
Résultats pour:
Hassan Niazi, Pacific Northwest National Laboratory, Joint Global Change Research Institute, Pacific Northwest National Laboratory, College Park, USA, Thomas B. Wild, Pacific Northwest National Laboratory, Joint Global Change Research Institute, Pacific Northwest National Laboratory, College Park, USA, Sean W. D. Turner, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Oak Ridge, USA, Neal T. Graham, Pacific Northwest National Laboratory, Joint Global Change Research Institute, Pacific Northwest National Laboratory, College Park, USA, Mohamad Hejazi, King Abdullah Petroleum Studies and Research Center, King Abdullah Petroleum Studies and Research Center, Riyadh, Saudi Arabia, Siwa Msangi, United States Department of Agriculture, Economic Research Service, United States Department of Agriculture, Washington DC, USA, Son Kim, Pacific Northwest National Laboratory, Joint Global Change Research Institute, Pacific Northwest National Laboratory, College Park, USA, Jonathan R. La
Over the past 50 years, humans have extracted the Earth’s groundwater stocks at a steep rate, largely to fuel global agro-economic development. Given society’s growing reliance on groundwater, we explore ‘peak water limits’ to investigate whether, when and where humanity might reach peak groundwater extraction. Using an integrated global model of the coupled human–Earth system, we simulate groundwater withdrawals across 235 water basins under 900 future scenarios of global change over the twenty-first century. Here we find that global non-renewable groundwater withdrawals exhibit a distinct peak-and-decline signature, comparable to historical observations of other depletable resources (for example, minerals), in nearly all (98%) scenarios, peaking on average at 625 km3 yr−1 around mid-century, followed by a decline through 2100. The peak and decline occur in about one-third (82) of basins, including 21 that may have already peaked, exposing about half (44%) of the global population to groundwater stress. Most