Per Aru
| Per Aru | |
| River | |
| Country | Sri Lanka |
|---|---|
| State | Northern Province |
| District | Vavuniya District Mullaitivu District |
| Source | Vavuniya District |
| Mouth | Nanthi Kadal |
| - elevation | 0 m (0 ft) |
| Length | 32 km (20 mi) |
| Basin | 374 km2 (144 sq mi) |
Per Aru is a river in Northern Province, Sri Lanka. The river rises in northern Vavuniya District, before flowing north/north-east through Vavuniya District and Mullaitivu District. The river empties into Nanthi Kadal lagoon.
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