The novel name checks the nonfiction book The Cadillac Desert by Marc Reisner which is also excellent background.
I also read Cadillac Desert after reading The Water Knife, and I enjoyed it much more. It's a pretty wide ranging book but does a nice job of weaving together all context it builds up. The one criticism that I have is that it seems pretty alarmist. The author stops just short of predicting impending collapse but the book was written in 1986 and we're just now getting to a crisis level after a historical drought.
Termination Shock was similar.
I would definitely like to read more speculative fiction on this topic!
All these half measures are no better than doing nothing.