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Designing Effective and Efficient Irrigation Systems

Contents

• Disclaimer
• Foreword
• 1 Introduction
• 2 Irrigation System Performance Measures
  • 2.1 Key Concepts & Terms
    • 2.1.1 Critical Soil Water Content
    • 2.1.2 Field Capacity
    • 2.1.3 Infiltrability and Infiltration Rate
    • 2.1.4 Average Application Depth
    • 2.1.5 Uniformity of Application Depth  
  • 2.2 Irrigation Efficiency
    • 2.2.1 Farm Distribution System Efficiency
      2.2.2 Application Efficiency

• 2.3 Measures of the Adequacy of Irrigation
  • 2.3.1 Adequately Watered Area
    2.3.2 Application Adequacy

• 2.4 The Effectiveness of Irrigation

• 3  What Factors are the Critical Determinants of Irrigation Performance?

• 3.1 Irrigation Timing and Application Depth 

• 3.2 Uniformity

• 3.2.1 Surface Irrigation 3.2.2 Sprinkler Irrigation
• 3.3 Water Supply Characteristics

4 Critical Design Decisions

• 4.1 Effectiveness
• 4.2 Adequacy
• 4.3 Mode of Operation
• 4.4 Uniformity
• 4.5 Application Rate
• 4.6 Application Depth Range
• 4.7 Wetted Footprint (or Area)

5 An Assessment of the Feasibility of Designing Efficient and Effective Irrigation Systems for NZ Conditions

6 Summary

7 References

Appendix I: MWD Border-Strip Watering Trials

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