Existing Problem: Poor System Uniformity
The sprinkler package is performing below the accepted standard of 80%.

Water Conserving Practice: Get new Sprinkler Package (same as original)

Install a new sprinkler package that is the same as the original design assuming that the original was correctly designed. This will restore the system to the original uniformity, >80%.

¹Potential No. of Irrigation Systems Affected	4400
Estimated Water Savings (%)	5 (0 to 10)
²Average Year Water Savings (million gal.)	4181
³Dry Year Water Savings (million gal.)	7168
Est. Cost of Full Implementation on Avg. System ($, 1998)	$250
Statewide Costs for Full Implementation ($, 1998)	$2,200,000
Cost / Unit of Water Saved in Avg. Year ($, 1998 / million gal.)	$526

Estimated water savings are between 0 and 10 percent. Smaller savings are associated with systems which are already using good practices and have uniformity coefficients that will only improve slightly. The high end savings are associated with systems which have uniformity coefficients well below the standards and are therefore over-applying water in some areas. The average estimated water savings is about 5%

Of the 8,000+ center pivot systems currently in the state of Georgia, 4400 are estimated to be candidates for this type improvement. The potential water savings from this practice alone would be about 4,181 million gallons during an average year. The cost to implement such a change is between $100 and $1000 per system. The low end cost is associated with a system that needed only sprinkler adjustments that used farm labor available at low cost. The high end cost is associated with a complete sprinkler change. The average cost for this conversion is about $250 per system. The estimated statewide costs for full implementation is $2.2 million The cost per unit water saved is estimated to be about $526 per million gallons of water saved.

Source: Evans, R.O., K.A. Harrison, J.E. Hook, C.V. Privette, W.I. Segars, W.B. Smith, D.L. Thomas, and A.W. Tyson. 1998. Irrigation conservation practices appropriate for the Southeastern United States. D.L. Thomas (ed.) Geologic Survey Project Report No. 32. Georgia Geologic Survey, Georgia Department Of Natural Resources, Environmental Protection Division, Atlanta, GA 30334. 43p.