Question: A side - roll sprinkler system is to be designed 1 0 irrigate bush beans in the Willamelte Valley in Oregon. This region has a

A side-roll sprinkler system is to be designed 10 irrigate bush beans in the Willamelte Valley in Oregon. This region has a warm maritime climate during the period of peak crop water use. The peak period water requirement has been calculated at
ETcp=7mmd
Meteorological data for the peak pcriod rate
Tmin=10.5CRHmat=93 percent
Tmas=27.8CRHmia=39 percent
U2=6.4kmh
The following information for total allowable depletion and maximum application rate is available from the Oregon Irrigation Guide for this location:
TAD =82mm
Imax=0.76cmh
---cont---??
The design uniformity and adequacy criteria for a specialty crop will be applied, resulting in
Uc=85 percent
a=90 percent
Side-roll equipment is available from the manufacturer with a lateral spacing of 12m. Mainline sections are available in lengths of 15m or 18m. Previous lests under the expected low wind conditions and using offsets have indicated that uniformitics of 85 percent are attainable with 18m mainline spacing and 12m lateral spacing. If the altainable uniformity coefficient is in question, a test should be run on a trial system for verification.
The operator wants to run the system on a schedule of 9 out of 10 days during the peak period with a total operating time of 20 out of 24 hours. The remaining four hours are required to drain and move the lateral. The operator wants to pressurize the system at the minimum feasible pressure to limit operating costs.
Assume the nozzle selection is constrained to those available in Table 7.5 for Model 29JH from the manufacturer's calalog. This will be a single nozzle system. Determine the design nozzle diameter, operating pressure, welled diameter, nozzle discharge, gross application rate, and actual lime of operation.
A side - roll sprinkler system is to be designed

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