Tamil Nadu’s water resources are primarily dependent on:

The correct answer is: a) Rainfall during the monsoon seasons.

Tamil Nadu receives an average annual rainfall of 1,000 mm, with most of the rain falling during the monsoon season from June to September. The state’s water resources are therefore primarily dependent on rainfall.

Groundwater is also an important source of water in Tamil Nadu, but it is not as reliable as rainfall. Groundwater levels have been declining in recent years due to over-extraction, and the state government has taken steps to regulate groundwater use.

Desalination plants are not currently a major source of water in Tamil Nadu, but the state government is considering building more desalination plants to meet the growing demand for water.

Inter-state water agreements are another source of water for Tamil Nadu, but they are not as important as rainfall or groundwater. The state government has agreements with the neighboring states of Kerala, Karnataka, and Puducherry to share water from rivers that flow through these states.

Here is a brief explanation of each option:

• Rainfall during the monsoon seasons: Tamil Nadu receives an average annual rainfall of 1,000 mm, with most of the rain falling during the monsoon season from June to September. The state’s water resources are therefore primarily dependent on rainfall.
• Groundwater: Groundwater is also an important source of water in Tamil Nadu, but it is not as reliable as rainfall. Groundwater levels have been declining in recent years due to over-extraction, and the state government has taken steps to regulate groundwater use.
• Desalination plants: Desalination plants are not currently a major source of water in Tamil Nadu, but the state government is considering building more desalination plants to meet the growing demand for water.
• Inter-state water agreements: Inter-state water agreements are another source of water for Tamil Nadu, but they are not as important as rainfall or groundwater. The state government has agreements with the neighboring states of Kerala, Karnataka, and Puducherry to share water from rivers that flow through these states.