Old Water and New Knowledge at Cienega Creek

“How old is your water?” That’s not a common question among water users, or even in water education, yet it’s high on the list for Dr. Jennifer McIntosh. She’s an Associate Professor in Hydrology & Atmospheric Sciences at the University of Arizona whose focus is the elemental and isotopic chemistry of water. For her, estimating the age of water can be a key tool in understanding the structure and functioning of aquifers. More…