40.10. Case Studies and Regional Examples

Try these first

1. 1.

   What is one major consequence of groundwater over-extraction?

   Hint

   Think about what happens when there is too little freshwater.

2. 2.

   What type of contamination arises from using untreated sewage for irrigation?

   Hint

   Consider what harmful substances can be present in sewage.

3. 3.

   What is a primary effect of over-extraction of groundwater in Punjab?

   • Increased crop yield
   • High salinity
   • Improved soil structure

   Hint

   Consider what too much extraction means for soil health.

4. 4.

   True or False: Untreated sewage can be safely used for irrigation without any treatment.

   • True
   • False

   Hint

   Think about what’s in sewage before it can be used safely.

5. 5.

   Evaluate a farming community facing salinity issues and propose a detailed plan to improve water quality for irrigation.

   Hint

   Consider all the factors affecting both soil and crop health.

6. 6.

   Discuss the long-term impacts of using untreated sewage for irrigation and how it affects local ecosystems.

   Hint

   Think about how contaminants can move through an ecosystem.