What are the different means of irrigation used in India?

How are dams useful to us?

What will happen to the groundwater reserves in an area where it rains heavily?

What will happen to the groundwater reserves in an area where it does not rain much?

Look at this picture.
Name the means of irrigation shown here. In which states is it popular?

How do our water resources get polluted? What can people do to stop this pollution?

Write the name of the state where this dam is situated.
Mettur _______________________

Write the name of the state where this dam is situated.
Maithon _______________________