51.3.3. Main Drains

Try these first

1. 1.

   What is the primary function of main drains?

   Hint

   Think about their role in the drainage system.

2. 2.

   Name one factor that affects the design of main drains.

   Hint

   Consider what determines how water will flow.

3. 3.

   What is the primary purpose of main drains in a drainage system?

   • To collect water
   • To transport water to outlets
   • To store water

   Hint

   Consider their role in preventing flooding.

4. 4.

   True or False: Improper design of main drains can lead to increased crop yields.

   • True
   • False

   Hint

   Think about the consequences of water accumulation.

5. 5.

   A farmer has a field with heavy clay soil and experiences frequent waterlogging. Describe the design alterations needed for main drains in this scenario.

   Hint

   Consider the soil’s drainage characteristics.

6. 6.

   Analyze the potential long-term effects on crop yield from neglecting the maintenance of main drains in a region prone to heavy rainfall.

   Hint

   Link neglect to the consequences of excess water.