Col 1 = Year; Col 2 = Annual average precip (10 stations); Col 3 = Reported water use (GMD 4 total, all uses except domestic); Col 4 = Acres reported irrigated; Col 5 = Inches of water reported applied per reported acre irrigated; and Col 6 = January 1 (following year) water level change. Unfortunately, 2012 data for water use and acres irrigated are not yet available.
The water level change data come from 275 observation wells across the entire GMD area that are measured each January.
rainfall data provided is annual precipitation. Six months out of the
year the rainfall is far less relevant to crops and irrigation. There
is probably a more relevant relationship between in-season rainfall and
what we're trying to show, but this is hard to flesh out when our region
gets just 60-65% of its total rainfall in season.|