Case Study:

In a semi-arid village in Rajasthan, the annual rainfall has reduced from 600 mm to 400 mm over the past decade. The village depends on groundwater for irrigation and domestic use. However, excessive use of tube wells has led to a sharp decline in the water table-from 20 meters to 45 meters below ground level.

To address the crisis, the village panchayat introduced water management strategies such as rainwater harvesting, construction of check dams, and promoting drip irrigation. A study revealed that farmers using traditional irrigation methods consumed nearly 60% more water than those using modern techniques like drip irrigation.

Despite these efforts, some farmers resisted change due to high initial costs and lack of awareness. Meanwhile, population growth increased domestic water demand by 25% in five years. The government proposed a policy to regulate groundwater extraction and provide subsidies for water-saving technologies.

Students are required to analyze the situation and suggest sustainable solutions, considering environmental, economic, and social factors. The case highlights the importance of efficient water management, conservation practices, and community participation in ensuring long-term water security.

Questions:

Section A - MCQs

1. What is the primary reason for the declining water table in the village?
   A. Increased rainfall
   B. Excessive groundwater extraction
   C. Reduced population
   D. Improved irrigation methods
2. Why is drip irrigation considered more efficient?
   A. It increases rainfall
   B. It reduces water wastage
   C. It is cheaper than traditional methods
   D. It requires no maintenance
3. Which factor increased domestic water demand?
   A. Migration
   B. Industrial growth
   C. Population growth
   D. Government policies
4. What is the main objective of constructing check dams?
   A. Increase electricity production
   B. Store rainwater and recharge groundwater
   C. Reduce soil fertility
   D. Promote urbanization

Section B - Short Answer Questions

1. Explain how rainwater harvesting helps in groundwater recharge.
2. Why are some farmers reluctant to adopt modern irrigation techniques despite their benefits?
3. Suggest two sustainable solutions to manage water scarcity in the village.

Section C - Long Answer Question

1. If the village continues to overuse groundwater without adopting conservation methods, what could be the long-term environmental and economic impacts? Suggest a comprehensive strategy to prevent this situation.

Answer Key:

MCQs Answers:

1. B
2. B
3. C
4. B

Section B Answers:

1. Rainwater harvesting collects and stores rainwater, allowing it to seep into the ground and replenish groundwater levels.
2. Farmers may resist due to high initial costs, lack of awareness, and uncertainty about long-term benefits.
3.  

• Promote drip irrigation and sprinkler systems
• Implement strict groundwater usage regulations
• Increase awareness programs (any two)

Section C Answer:

If overuse continues:

• Environmental impacts: Severe groundwater depletion, desertification, reduced agricultural productivity
• Economic impacts: Increased farming costs, loss of income, migration

Strategy:

• Enforce groundwater regulations
• Provide subsidies for efficient irrigation
• Promote rainwater harvesting and check dams
• Community awareness and participation