Appendix A  References Evapotranspiration (ETo) Table
 
Appendix A. Reference Evapotranspiration (ETo) Table
County and City
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Annual ETo
BUTTE
Gridley
1.2
1.8
3.0
4.7
6.1
7.7
8.5
7.1
5.4
3.7
1.7
1.0
51.9
 
   *   The values in this table were derived from:
   1)   California Irrigation Management Information System (CIMIS);
   2)   Reference EvapoTranspiration Zones Map, UC Dept. of Land, Air & Water Resources and California Dept. of Water Resources 1999; and
   3)   Reference Evapotranspiration for California, University of California, Department of Agriculture and Natural Resources (1987) Bulletin 1922;
   4)   Determining Daily Reference Evapotranspiration, Cooperative Extension UC Division of Agriculture and Natural Resources (1987), Publication Leaflet 21426.
(Ord. 814-2015, 2016)