| Reiu | |
|---|---|
| Origin | Lake Soka |
| Mouth | Pärnu River |
| Basin countries | Estonia, Latvia |
| Length | 73 km |
| Source elevation | 50 m |
| Avg. discharge | 17.3 m³/s |
| Basin area | 917 km² |
The Reiu is a 73 km (45 mi) long river in southwest Estonia. Its source is Lake Soka in Latvia. It flows generally north. It is a left tributary of the Pärnu River into which it flows near the city of Pärnu. The basin area of Reiu is 917 km² and average discharge 17.3 m³/s.[1]