Engineering Commons^™

Characteristics Of Irrigation Pump Performance In Major Irrigated Areas Of California, Charles Burt

BioResource and Agricultural Engineering

Pumping data was collected from over 15,000 well and non-well pumps throughout the Sacramento, Salinas, and San Joaquin Valley groundwater basins of California. Each of these basins is divided into a number of subbasins. A map of the general layout is shown below (gray lines outside of basins represent county lines; gray lines inside basins represent subbasins).

Data was analyzed by basin and subbasin for well pumps and non-well pumps. For each pump type, averages were calculated based on:

• The whole basin
• Overall pumping plant efficiency (OPPE)
• kWh/AF
• Subbasins

General conclusions were drawn for each set of averages, and a …

Variable Frequency Drive (Vfd) Controlled Irrigation Pumps – Analysis Of Potential Rebate, Charles M. Burt

BioResource and Agricultural Engineering

Well pumps, booster pumps, and a combination of the two are used throughout the agricultural sector to provide water for on-farm irrigation. However, the pump discharge pressures for the majority of irrigation systems are excessive, waiving considerable monetary and power consumption savings. This report analyzes the numerous potential benefits of integrating a variable frequency drive (VFD) to irrigation supply systems and modifying system design philosophies.

Octave Spanning Supercontinuum In An As2s3 Taper Using Ultralow Pump Pulse Energy, Darren D. Hudson, Stephen A. Dekker, Eric C. Magi, Alexander C. Judge, Stuart D. Jackson, Enbang Li, J S. Sanghera, L B. Shaw, I D. Aggarwal, Benjamin J. Eggleton

Faculty of Engineering and Information Sciences - Papers: Part A

An octave spanning spectrum is generated in an As2S3 taper via 77 pJ pulses from an ultrafast fiber laser. Using a previously developed tapering method, we construct a 1.3 μm taper that has a zero-dispersion wavelength around 1.4 μm . The low two-photon absorption of sulfide-based chalcogenide fiber allows for higher input powers than previous efforts in selenium-based chalcogenide tapered fibers. This higher power handling capability combined with input pulse chirp compensation allows an octave spanning spectrum to be generated directly from the taper using the unamplified laser output.

Characteristics Of Pump Performance In Major Irrigated Areas Of California, Sierra A. Orvis Layous, Charles M. Burt, Luis P. Urrestarazu

BioResource and Agricultural Engineering

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.