@JFleck: the paradoxes of irrigation efficiency

All American Canal Construction circa. 1938 via the Imperial Irrigation District

From InkStain (John Fleck):

he University of New Mexico water posse had a great visit yesterday with Christopher Scott, the new director of the Udall Center for Studies in Public Policy at the University of Arizona. Scott spoke a couple of times and met with students at our Community and Regional Planning program, who have been doing a lot of work on wastewater reuse (shoutout to Caroline Scruggs, who’s leading this effort, and who hosted Scott).

Scott talked about the work he’s been doing in this same area, which raises non-trivial questions with deep implications for what happens when you “conserve” water – the fact that the water you “save” was often doing something useful somewhere else, whether you meant it to our not. Like a sewage treatment plant outfall into a river. Or, as from this 2014 paper, water leaking from the unlined All-American Canal on the Lower Colorado River that recharged an aquifer:

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