Appendix L2. CALCULATING THE WATER BUDGET OF A PROJECT SITE

Reference Evapotranspiration (ETo) Table*

Monthly Average Reference Evapotranspiration by ETo Zone (inches/year)

Ventura	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	TOTAL
*	2.2	2.6	3.2	3.8	4.6	4.7	5.5	4.9	4.1	3.4	2.5	2.0	43.5

 

* The values in the table for Ventura County were derived from:

1)

California Irrigation Management Information System (CIMIS);

2)

Reference Evapotranspiration Zones Map, University of California Department of Land Air & Water Resources and California Department 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 University of California and Natural Resources (1987), Publication Leaflet 21426

(Ord. No. 4492, § 9, 6-21-2016)