After a couple of years of setback, the aquifer underneath the University of New Mexico neighorhood is rising again.
The spring measurement shows that it’s risen three feet since last year around this time.
The annual variability (the graph’s ups and downs) are the result of regional groundwater pumping for our municipal supply – more pumping in summer, less in winter. It’s fun to see how the regional aquifer responds, like a big bathtub filled with gravel and sand.
The long term upward trend, beginning in 2006-08-ish, is the result of a) significant conservation reducing overall municipal demand, and b) a shift to imported surface water via the San Juan-Chama Project.
The dip in 2020-21 is because we had a badass drought that required us to shift a significant amount of our supply off of that imported surface water and increase our groundwater pumping. The aquifer here dropped five feet from 2021 to 2022, for example.
This is a great example of polycentric governance. Absent a top-down (read state government) regulatory framework, our local water utility, the Albuquerque Bernalillo County Water Utility Authority, has taken it upon itself to serve as a sort of de facto manager of this aquifer – not because it’s our legal responsibility (though there are some legal entanglements with the state water rights regime) but because we, as a community, concluded a number of years ago that it was in our best interest to take care of the aquifer. (Disclosure: I serve on the ABCWUA Technical Customer Advisory Committee.)
This is just one measurement point, because one of my intellectual tricks is to pick a gage (usually a river gage, but also this one for groundwater) and pay attention to it. This is tricky, because what if it’s not representative? But there’s been a lot of work by the USGS and others looking at our groundwater network as a whole, and the trend holds in general in the big, deep aquifer beneath Albuquerque. (One of my other favorite wells, City #2, which goes back to the 1950s, is up 6 inches year-over-year. Another favorite is City #3, which is located at the heart of one of the thick geographies I’m writing about for the new book, and is really close to one of the ABCWUA well fields, which tells another fabulous story as a result, but I’ve got a chapter to finish today so I’ll leave that for another day.)