Here are some false statements. Identify the mistakes and rewrite them correctly.

1. Multiplying urban centres with large and dense populations and urban lifestyles have helped in proper utilisation of water resources.
2. Regulating and damming of rivers does not affect the river's natural flow and its sediment flow.
3. In Gujarat, the Sabarmati basin farmers were not agitated when higher priority was given to water supply in urban areas, particularly during droughts.
4. Today in Rajasthan, the practice of rooftop rainwater water harvesting has gained popularity despite high water availability due to the Indira Gandhi Canal.

Explain how water becomes a renewable resource.

Compare the advantages and disadvantages of multi-purpose river projects.

Discuss how rainwater harvesting in semi-arid regions of Rajasthan is carried out.