Mangalam River

The Mangalam River is the main tributary of the river Gayathripuzha, which in turn is a tributary of Bharathapuzha, the second longest river in Kerala, India.

It is around 30 kilometres (19 mi) long, with its source in the Nelliyampathy forests, and passing through Vadakkencherry, Kannambra, Puthucode, and Padur before joining the Gayathripuzha at Plazhi in the border of Thrissur and Palakkad districts.

Constructed across the Cherukunnapuzha river, a tributary of the Mangalam river, the Mangalam Dam holds a substantial water capacity of 25.34 million cubic feet. A canal system for irrigation was completed and opened in 1966, in Alathur taluk, Palakkad district.

During the Sabarimala season the quality of water has been deteriorating, according to a study.