Hydrology & Water Resources Engineering - Vol 3 | 39. Duty and Delta by Abraham | Learn Smarter
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Knowledge
39. Duty and Delta

Duty and Delta are essential principles in irrigation engineering that govern the relationship between water supply and land area irrigated. Understanding these concepts is crucial for effective irrigation planning and water management, aimed at optimizing agricultural productivity while minimizing water waste.

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Sections

  • 39

    Duty And Delta

    Duty and Delta are key concepts in irrigation engineering that link water supply to the area of land irrigated, essential for effective agricultural planning.

    Learning Practice

  • 39.1

    Delta (Δ)

    Delta (Δ) is the total depth of water required by a crop during its growth period, and it is crucial for understanding irrigation needs.

    Learning Practice

  • 39.1.1

    Definition

    This section defines Delta (Δ) and Duty (D) in irrigation engineering, outlining their significance in water management and agricultural practices.

    Learning Practice

  • 39.1.2

    Mathematical Expression

    Delta (9; 9) is the total depth of water required by a crop during its growth, while Duty (D) represents the area irrigated by a unit discharge of water.

    Learning Practice

  • 39.1.3

    Factors Affecting Delta

    This section outlines the various factors influencing Delta, which is the total depth of water required by crops over their growth period.

    Learning Practice

  • 39.1.4

    Typical Delta Values

    This section provides typical delta values for various crops, which is essential for understanding crop water requirements in irrigation.

    Learning Practice

  • 39.2

    Duty (D)

    Duty (D) refers to the area of land irrigated per unit discharge of water over the crop's base period.

    Learning Practice

  • 39.2.1

    Definition

    In irrigation engineering, Duty (D) describes land irrigated per unit discharge of water, while Delta (Δ) represents the total water depth needed by crops.

    Learning Practice

  • 39.2.2

    Mathematical Expression

    The mathematical expression for Duty (D) explains the relationship between the area of irrigated land and the discharge of water required.

    Learning Practice

  • 39.2.3

    Units

    The section focuses on the concepts of Duty (D) and Delta (Δ) in irrigation engineering, which are crucial for water management and agricultural productivity.

    Learning Practice

  • 39.2.4

    Types Of Duty

    This section elaborates on the concept of Duty in irrigation, emphasizing its types and their significance.

    Learning Practice

  • 39.3

    Relationship Between Duty And Delta

    This section addresses the crucial relationship between Duty (D) and Delta (Δ) in irrigation planning, encapsulating how water discharge relates to crop water requirements.

    Learning Practice

  • 39.3.1

    Derivation

    This section explains the derivation of the relationship between Duty and Delta in irrigation management.

    Learning Practice

  • 39.4

    Significance Of Duty And Delta

    Duty and Delta are critical concepts in irrigation engineering that dictate water supply and land irrigation relationships.

    Learning Practice

  • 39.5

    Factors Affecting Duty

    This section discusses the various factors that influence the duty in irrigation engineering, highlighting how different elements such as soil type, crop type, and climate can affect water management.

    Learning Practice

  • 39.6

    Methods To Improve Duty

    This section outlines various methods to enhance the duty in irrigation systems.

    Learning Practice

  • 39.7

    Practical Application And Example

    This section illustrates the practical application of Duty and Delta in irrigation engineering through a worked example involving calculations.

    Learning Practice

  • 39.8

    Delta For Different Crops (Empirical Values)

    This section provides empirical delta values for various crops based on their irrigation needs over specified base periods.

    Learning Practice

  • 39.9

    Canal Design Based On Duty

    This section outlines key considerations in designing irrigation canals, emphasizing the importance of delta and duty.

    Learning Practice

References

Chapter_39_Duty.pdf

Class Notes

Memorization

What we have learnt

  • Delta (Δ) represents the to...
  • Duty (D) indicates the area...
  • The relationship between Du...

Final Test

Revision Tests