California's canal-top solar pilot has wrapped up, and the early results suggest the idea could do much more than generate clean electricity. It could also help protect one of the state's most precious resources: water. As PV Magazine detailed, the 1.6-megawatt Nexus project, completed in September, was built over canals operated by the Turlock Irrigation District. The pilot is the first of its kind in the country and was designed to test whethe…