39.2.4. Types of Duty

Try these first

1. 1.

   What is Duty in the context of irrigation?

   Hint

   Think about how water is measured against land area.

2. 2.

   Name one type of Duty.

   Hint

   Consider where the water is measured.

3. 3.

   What does Duty (D) measure in irrigation?

   • Area per unit discharge
   • Discharge rate
   • Water depth

   Hint

   Consider what irrigation efficiency relates to.

4. 4.

   True or False: Net Duty is higher than Gross Duty.

   • True
   • False

   Hint

   Think about water losses.

5. 5.

   If a canal discharges 12 cumecs, and it irrigates 15,000 hectares, while there's a 20% loss in conveyance, calculate both Gross Duty and Net Duty.

   Hint

   Calculate Gross first, then apply the loss percentage.

6. 6.

   In a scenario where the canal's capacity has to meet a peak crop growth period, determine why understanding Duty is critical.

   Hint

   Consider the relationship between crop growth and water availability.