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Detailed explanation-1: -The river drains parts of Idukki, Ernakulam and Thrissur districts in Kerala and Coimbatore district in Tamil Nadu.

Detailed explanation-2: -Periyar River, river in southern Kerala state, southwestern India. Periyar is also the name given to a lake in the river’s course. The river, 140 miles (225 km) long, rises in the Western Ghats range near the border with Tamil Nadu state and flows north a short distance to Periyar Lake.

Detailed explanation-3: -Periyar Wildlife Sanctuary, wildlife preserve in south-central Kerala state, southern India.

Detailed explanation-4: -The Periyar River is the longest river in the state of Kerala with a length of 244 km. It is also known as ‘Lifeline of Kerala’ as it is one of the few perennial rivers in the state.

Detailed explanation-5: -Considered to be the lifeline of Kerala, the Periyar River is the longest river in the state of Kerala, India that covers a length of about 244 km. It serves as a source of drinking water for the major towns in the state apart from a few other perennial rivers.