Aliyar is one of the tributaries of the river Kannadipuzha. Kannadipuzha is one of the main tributaries of the river Bharathapuzha, the second-longest river in Kerala, south India. Its source is the Aliyar dam in Aliyar near Pollachi in Tamil Nadu.
| Aliyar River | |
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Aliyar Dam Reservoir
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 Location of mouth
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| Physical characteristics | |
| Source | |
| • coordinates | 10.3617543°N 77.0920165°E |
| Mouth | |
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• coordinates
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10°37′N 76°57′ECoordinates: 10°37′N 76°57′E |
| Basin features | |
| Waterbodies | Aliyar Reservoir, Upper Aliyar Reservoir |
