Manjalar (Tamil:மஞ்சளாற���) originates from Palani hills and runs towards east and joins the Vaigai River near Koottathu. There are nine anicuts and nine tanks in this sub-basin. It receives an annual rainfall of 775 millimetres (30.5 in). The total sub-basin area is 470 square kilometres (180 sq mi). The total ayacut of the sub-basin is 2,155.53 hectares (5,326.4 acres).
- Vaigai river basin. "River Basins of Tamil Nadu" (PDF). Planning Commission of India. Retrieved 14 May 2012.