Is Kolleru lake artificial?

Kolleru Lake is not artificial but is a natural freshwater lake. It is the largest natural lake in India  and is located between Krishna and Godavari Deltas.

The lake was declared as a wildlife sanctuary in November 1999 under India’s Wildlife Protection Act of 1972, and designated a wetland of international importance in November 2002 under the Ramsar Convention.

For more relevant articles refer to the links given below:

• UPSC Environment and Ecology Questions
• Major River Systems in India
• UPSC Environment and Ecology