39.4. Significance of Duty and Delta

Try these first

1. 1.

   What is Duty in irrigation terms?

   Hint

   Think about how much land can be watered.

2. 2.

   Define Delta.

   Hint

   Consider the cumulative water needs from planting to harvest.

3. 3.

   What defines Delta in irrigation?

   • A measure of land area
   • The water depth required by crops
   • Water discharge per second

   Hint

   Think about crop needs.

4. 4.

   True or False: Duty relates to the amount of water needed for crop growth.

   • True
   • False

   Hint

   Relate Duty to area.

5. 5.

   A new irrigation project aims to irrigate 30,000 hectares with a discharge of 12 cumecs. Calculate the Duty and subsequently the Delta for a base period of 150 days.

   Hint

   Use the respective formulas for Duty and Delta.

6. 6.

   Evaluate how varying soil types may affect both Duty and Delta in an area with a diverse climate.

   Hint

   Consider the characteristics of different soil types and their influence on water retention and usage.