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Chapter 9

Chapter 9. Drainage and Irrigation. Objectives. Define drainage and explain its importance Explain the difference between wetlands and wet soils Identify methods of artificial drainage Identify methods of irrigation Decide when and how much to irrigate

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Chapter 9

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  1. Chapter 9 Drainage and Irrigation Soil Science & Management, 4E

  2. Objectives • Define drainage and explain its importance • Explain the difference between wetlands and wet soils • Identify methods of artificial drainage • Identify methods of irrigation • Decide when and how much to irrigate • Name water quality problems for irrigation Soil Science & Management, 4E

  3. Border-strip irrigation Capillary fringe Center-pivot irrigation Drainage Drip irrigation Furrow irrigation Hand-move irrigation Hydric soil Hydrology Leaching requirement Perched water tables Saline soil Seeps Solid-set irrigation Soluble salts Subirrigation Subsurface drainage Surface drainage Surface irrigation Traveling-gun irrigation Wetlands Wheel-move irrigation Terms to Know Soil Science & Management, 4E

  4. The Importance of Drainage • Effects of poor drainage Figure 9-1 Soil Science & Management, 4E

  5. Wetland and Wet Soils • Wetlands • Water control • Water quality • Wildlife habitat • Recreation and education Soil Science & Management, 4E

  6. Wetland and Wet Soils • Wet soils Soil Science & Management, 4E

  7. Artificial Drainage • Surface drainage • Subsurface drainage Soil Science & Management, 4E

  8. Irrigation Systems Figure 9-7 Soil Science & Management, 4E

  9. Irrigation Systems Figure 9-8 Soil Science & Management, 4E

  10. Irrigation Systems • Subsurface irrigation Figure 9-9 Soil Science & Management, 4E

  11. Irrigation Systems • Surface irrigation • Border-strip irrigation • Furrow irrigation Soil Science & Management, 4E

  12. Irrigation Systems • Sprinkler irrigation • Hand-move irrigation • Solid-set irrigation Figure 9-13 Soil Science & Management, 4E

  13. Irrigation Systems • Traveling-gun irrigation • Center-pivot irrigation Soil Science & Management, 4E

  14. Irrigation Systems • Wheel-move irrigation • Microirrigation • Drip irrigation • Microspray irrigation Figure 9-18 Soil Science & Management, 4E

  15. Using Irrigation • Deciding when to irrigate Figure 9-20 Soil Science & Management, 4E

  16. Using Irrigation • How much to water Figure 9-21 Soil Science & Management, 4E

  17. Using Irrigation • Saving water Figure 9-22 Soil Science & Management, 4E

  18. Water Quality • Suspended solids • Boron • Soluble salts Figure 9-23 Soil Science & Management, 4E

  19. Water Quality Figure 9-24 Soil Science & Management, 4E

  20. Summary • Advantages to artificial drainage • Poorly drained O2 deficient • Irrigation supplies water • Avoid water stress • Watch water quality • Use water efficiently Soil Science & Management, 4E

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