Chakra Nangal Dam is an illustration of

 Storage dams are mainly constructed to collect water during the rainy season. 

The Bhakra Nangal Dam is indeed an example of a storage dam. A storage dam is built for the purpose of storing water for later use. The stored water can be used for various purposes such as irrigation, hydroelectric power generation, flood control, and water supply. The Bhakra Nangal Dam is a large-scale storage dam that provides a significant source of water for irrigation and hydroelectric power generation and helps control the flow of the Sutlej River to prevent floods. The chakra-Nangal dam is a storage dam with a storage capacity of 9621 million cubic meters.