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Characteristics of Pump Performance in Major Irrigated Areas of California





ITRC Report No.

P 11-010



15 pages



Orvis, S.A., C.M. Burt. L.Perez Urrestarazu.



Proceedings of the Sixth International Conference on Irrigation and Drainage. United States Committee on Irrigation and Drainage (USCID). Nov. 15-18, 2011. San Diego, CA.






Well pump tests (12,876) in three Central California groundwater basins were characterized and described according to their spatial distribution.  The average overall pumping plant efficiency (wire-water, not including column losses and velocity head) was about 56%.  Characteristics such as drawdown, total dynamic heads, kW, and flow rate vary greatly between pumps within and between sub-basins.  This is the first well pump characterization of its type in California, although irrigation pump tests have been conducted for over 70 years in California.  This paper provides a summary of the spatial variation of well pump performance and characteristics.




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