1. Rick Schlegel Agricultural Engineer USDA - NRCS OKLAHOMA
IRRIGATION
Rick Schlegel
Agricultural Engineer
USDA - NRCS OKLAHOMA

2. HOW IS OKLAHOMA NRCS ASSISTING WITH IRRIGATION AND SAVING WATER?
INSTALLING MORE EFFICIENT IRRIGATION SYSTEMS
DEVELOPING IRRIGATION WATER MANAGEMENT PLANS
PROMOTING IRRIGATION SCHEDULING USING EVAPOTRANSPIRATION (ET)
PROMOTING WELL DECOMMISIONING

3. HOW CAN WE MAKE SYSTEMS MORE EFFICIENT?
CONVERTING FROM LESS EFFICIENT FURROW OR SIDE ROLL IRRIGATION SYSTEMS TO MORE EFFICIENT CENTER PIVOTS OR LINEAR SYSTEMS
CONVERTING LESS EFFICIENT SPRINKLER SYSTEMS TO GREATER EFFICIENCIES OR REPLACING WITH SUBSURFACE DRIP SYSTEMS

4. GENERALLY SPEAKING, WHAT TYPES OF INEFFICIENT SYSTEMS ARE WE REPLACING?
Furrow Systems
Hand Move Systems
Side Roll Systems
Conventional Impact Systems
Conventional Spray Systems

5. FURROW IRRIGATION

6. FURROW IRRIGATION USING SIPHON TUBES

7. FURROW IRRIGATION USING GATED PIPE AND SURGE VALVE

8. Furrow Irrigation Using Collapsible Gated Pipe

9. Hand Move Sprinkler System

10. CONVENTIONAL SIDE ROLL IMPACT SPRINKLER
Side Roll Sprinkler System

11. CONVENTIONAL IMPACT

12. CONVENTIONAL SPRAY

13. WHAT TYPES OF SYSTEMS ARE WE PROMOTING TO REPLACE THE OLDER LESS EFFICIENT SYSTEMS?
LEPA - Low Energy Precision Application
LESA - Low-Elevation Spray Application
LPIC - Low Pressure In-Canopy
MESA - Mid-Elevation Spray Application
Subsurface Drip Irrigation Systems

14. LEPA & LESA
IRRIGATION SYSTEMS

15. LEPA SYSTEM

16. LEPA SYSTEM

18. LESA SYSTEM

19. LPIC & MESA
IRRIGATION SYSTEMS

21. LPIC SYSTEM

23. MESA
MESA SYSTEM

25. USDA-NRCS Sprinkler Certification Requirements
CPED PROGRAM
USDA-ARS developed the computer program
CPED needs a pivot design printout from the manufacturer for input data
CPED is used to certify the Coefficient of Uniformity (CU) of the pivot

28. OTHER SYSTEM IMPROVEMENTS
INSTALLING PRESSURE REGULATORS
INSTALLING FLOW METERS
INSTALLING CHEMIGATION VALVES
WELL DECOMMISSIONING

29. PRESSURE REGULATORS

30. PRESSURE

31. FLOWMETER

32. CHEMIGATION VALVE

33. WELL DECOMMISSIONING

34. DRIP IRRIGATION SYSTEMS

35. Drip Tapes

37. DRIP LINES PLOWED IN

38. FILTER SYSTEM

39. DEVELOPING IRRIGATION
WATER MANAGEMENT PLANS

41. IRRIGATION SCHEDULING USING
EVAPOTRANSPIRATION
( ET )

43. ET GAGE

44. EVAPOTRANSPIRATION USING THE OKLAHOMA MESONET

45. MESONET SITE

46. QUESTIONS ?