1. Irrigation R. Nolan Clark USDA-Agricultural Research Service Bushland, TX

3. Top 10 States - Irrigated Acres StateUSDAUSGS California8,139,83410,100,000 Nebraska5,692,2157,820,000 Texas5,237,5846,490,000 Arkansas4,043,3824,510,000 Idaho3,188,4063,750,000 Colorado2,942,2303,400,000 Kansas2,650,4863,310,000 Montana1,740,8731,720,000 Florida1,613,7192,060,000 Washington1,554,8131,570,000

4. Source of Water

5. Irrigation Water Use (ac-ft) StateUSDAUSGS California25,153,49534,200,000 Texas7,473,8809,680,000 Idaho6,030,44719,100,000 Arkansas5,516,6038,870,000 Colorado5,052,61212,800,000 Nebraska4,975,3309,860,000 Arizona4,117,6526,060,000 Kansas3,589,2264,160,000 Washington3,364,5853,400,000 Oregon3,255,5016,810,000

6. Application Rate (ac-ft/ac) StateUSDAUSGS Arizona4.76.2 California3.13.4 Washington2.2 Oregon2.13.1 Idaho1.95.1 Colorado1.73.8 Arkansas1.42.0 Kansas1.41.3 Texas1.41.5 Nebraska0.91.3

8. The Ogallala Aquifer

9. Total Irrigated Acres Census of Agriculture

10. Sprinkler Applications Surface Applications

11. Efficiencies of Irrigation Methods

12. Method of Distribution

13. Colorado

14. Texas

15. Colorado, Percent by Acres

16. Kansas, Percent of Acres

17. Texas, Percent by Acres

18. Colorado

19. Texas

23. Powering Electric Pumps Average size 40-50 kW Existing electric grid480V, 3-phase Issues: –Market for off-season electric power –Meeting peak demand in summer

24. Powering Gas/Diesel Pumps Average size 120-140 kW Existing electric grid120-240V, single- phase Issues: –Weak grid for excess power generated –Stand-by generator to meet peak demand in summer