Robert W. Purvis: Want to save water? Turn canals upside down
It has become clear that the irrigation districts built their canals upside down. The bottoms should be unlined so as to replenish the aquifers and the top should be covered so as to impede evaporation.
Robert W. Purvis, Modesto
This story was originally published February 23, 2016 at 5:14 PM with the headline "Robert W. Purvis: Want to save water? Turn canals upside down."