Peninsular River · West-flowing

Chalakudy

Periyar North Branch
🏔️ Anaimalai Hills, Kerala-Tamil Nadu border (2400 m) → Vembanad Lake, Kerala
144 kmTotal Length
1,704Basin km²
PerennialFlow Type
1States
Great HornbillFlagship Species

About the Chalakudy

The Chalakudy River is one of Kerala's most biodiverse rivers and home to the famous Athirappilly Falls — the largest waterfall in Kerala and one of the most filmed natural locations in Indian cinema. The river rises in the Anaimalai Hills at the southern edge of the Nilgiri Biosphere Reserve and flows west through the Western Ghats before entering the Kerala lowlands. Athirappilly and the adjacent Vazhachal falls are the last nesting habitat of the Great Hornbill in Kerala — the enormous yellow-casqued bird is regularly seen flying over the falls.

The Chalakudy is one of the rivers on which a proposed hydroelectric project has been fought most vigorously by conservationists — the Athirappilly Hydroelectric Project, which would dam the river just above the falls, has been contested in Kerala's high courts and national tribunals for over three decades. The river supports 85 fish species — the highest diversity of any Kerala river — including the endemic Chalakudy perch and the giant mahseer. The confluence of biodiversity, scenic beauty, and conservation controversy makes the Chalakudy one of India's most important rivers for public environmental awareness.

States along this river
Kerala
Length (vs Ganga, 2525 km)
144 km — 5% of India's longest river
Key tributaries

Parambikulam · Sholayar · Karapara

Wildlife along this river
Great Hornbill 🦜Smooth otter 🦦Asian Elephant 🐘Lion-tailed Macaque 🐒Mahseer 🐟
Best time to explore
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