Published in California Agriculture, Volume 43, Issue 6, November 1, 1989, pages 9-12.
The definitive version is available at http://dx.doi.org/10.3733/ca.v043n06p9.
Seepage losses in the San Joaquin Valley's Westlands Water Districts were estimated at 27,000 acre-feet a year, or about 2% of the district's water supply. Ditch configuration and construction techniques appear to influence seepage rates.
Agricultural and Resource Economics | Bioresource and Agricultural Engineering