africaapproachesassessingatmosphericbeyondbrazilcaliforniachangeclimatecountriesdevelopdevelopmentdroughtdroughtseastextremesfloodingfloodsfoodgeophysicsglobalgroundwaterhydrologyimpactsincreasingindiairrigationissueslandlearninglinkagesmachinemanagementmanagingmodelingpotentialproductionresilienceresourceriversrolesaharanscarcitysolutionssouthwestsubsurfacesustainabilitysustainabletexastradeunderstandinguse