4.1. Methods of Estimating Discharge

Try these first

1. 1.

   What does delta (Δ) represent in irrigation?

   Hint

   Think about what crops need to grow.

2. 2.

   How is discharge related to area and delta?

   Hint

   Remember the factors influencing irrigation.

3. 3.

   What is duty in the context of irrigation?

   • Area irrigated per unit discharge
   • Depth of water needed
   • Total water requirement

   Hint

   Remember, duty is about area and discharge, not depth.

4. 4.

   True or False: Delta represents the total acreage that can be irrigated at one time.

   • True
   • False

   Hint

   Think about what lies beneath the surface!

5. 5.

   Design a canal system for an area of 100 hectares requiring 7 cm of water over 25 days. What should the estimated discharge be?

   Hint

   Remember the connection between area, delta, and duration!

6. 6.

   Analyze how historical crop failures influence planned discharge in a new irrigation project. What adjustments would you recommend?

   Hint

   Think critically about learning from the past and its application.