What kind of irrigation works were developed in the Tamil region?

Around fifth or sixth century Cholas developed new methods of irrigation.

1. They opened their land for large scale cultivation.

2. They cleared the forest and leveled the land for agriculture.

3. They built embankments to prevent flood and canals to carry water.

4. The irrigation works developed in the Tamil region with the help of artificial ways to water their crops via – wells, tanks to collect rainwater and river channels.