Changes

Sprinkler

No change in size, 19:05, 8 November 2012

→‎Construction, operations and maintenance

Pressure is an important factor in successful sprinkler operation. Typical operating pressures range from 2 to 6 bar, and so energy requirements can be much greater than for surface irrigation. If sprinklers are working at the pressure recommended by the manufacturer then the distribution will be good. If the pressure is above or below this value then the distribution will be adversely affected. The most common problem is when pressure is too low and this happens when pump and pipes wear, increasing friction and so reducing pressure.

[[File:sprinkler data.jpg|thumb|center|~~600px~~400px|Typical data for rotary impact sprinklers. Table: FAO, [http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CGkQFjAA&url=ftp%3A%2F%2Fftp.fao.org%2Fagl%2Faglw%2Ffwm%2FSmallScalePumpedIrrigation.pdf&ei=WyXFT9SKO-r2sQKDuYDoDw&usg=AFQjCNEEHF2n_scI2pDSHzV9R_CWhHk87w&sig2=8_sjoqXSBWPQ41-1s7_iVw Small-scale pumped irrigation energy and costs.]]]

==Costs==

Winona

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