51.5.2.b. Vertical Drainage (Deep Wells)

Try these first

1. 1.

   What is vertical drainage?

   Hint

   Think about how we control the water table for crops.

2. 2.

   Name one benefit of deep wells.

   Hint

   How does maintaining a low water table help crops?

3. 3.

   What is the primary function of deep wells in vertical drainage?

   • To irrigate crops
   • To lower the water table
   • To provide nutrients

   Hint

   Consider why managing the water table is important for crops.

4. 4.

   True or False: High salinity can enhance crop growth.

   • True
   • False

   Hint

   What happens to plants when they are in saline soils?

5. 5.

   A farmer in a region with high groundwater faces crop failures due to waterlogging. Design a plan using vertical drainage systems.

   Hint

   Consider both the environmental factors and the crop requirements in your design.

6. 6.

   Calculate the flow rate needed for a deep well to lower the water table by 1 meter in a field of 1 hectare, assuming the soil has a constant permeability of 10 m/day.

   Hint

   Remember to relate the area of the field to the amount of water to be extracted.