39. Duty and Delta

Try these first

1. 1.

   What is Delta?

   Hint

   Think about the growing phase of a crop.

2. 2.

   What does Duty measure?

   Hint

   What do you think this tells us about the efficiency of water use?

3. 3.

   What is the primary function of Delta in irrigation?

   • A. Measure soil fertility
   • B. Determine water requirement for crops
   • C. Calculate the area covered by crops

   Hint

   Think about why we need water for plants!

4. 4.

   Is the following statement true or false? 'Duty refers to the total volume of water supplied.'

   • True
   • False

   Hint

   Remember, Duty is related to area, not water volume.

5. 5.

   An irrigation system designed for a crop with a peak water requirement of 150 cm over 150 days leads to an estimated Duty of 600 hectares/cumec. What is the calculated Delta?

   Hint

   Consider B as the base period and substitute values into the formula!

6. 6.

   Given a canal that is losing 10% of water during conveyance and originally has a Duty of 800 hectares/cumec, determine the Net Duty.

   Hint

   Think about how losses affect available water for irrigation.