39.2.1. Definition

Try these first

1. 1.

   What is Duty in terms of irrigation?

   Hint

   Think about the relationship between water flow and land area.

2. 2.

   Define Delta in irrigation terms.

   Hint

   Consider what a crop needs from planting to harvesting.

3. 3.

   What does Duty in irrigation refer to?

   • The depth of water
   • Area per unit discharge
   • Crop type

   Hint

   Think about the flow of water and its effectiveness on land.

4. 4.

   True or False: Delta is measured in hectares.

   • True
   • False

   Hint

   Recall how we quantify water depth.

5. 5.

   An irrigation system has a Duty of 2500 hectares/cumec and a Delta of 0.6m. Determine the appropriate base period for this Duty.

   Hint

   Apply the formula for the relationship between Duty and Delta.

6. 6.

   Discuss how varying soil types would affect the calculation of Duty and Delta for a specific crop.

   Hint

   Consider the implications of soil characteristics on water management.