| Piusa | |
|---|---|
Härma wall on Piusa |
|
| Origin | Plaani Külajärv |
| Mouth | Lake Pihkva |
| Basin countries | Estonia, Russia |
| Length | 109 km |
| Source elevation | 244 m |
| Mouth elevation | 30 m |
| Avg. discharge | 5.5-6.0 m³/s |
| Basin area | 796 km² |
Piusa (Russian: Пиуза, Пимжа) is a river in Southeastern Estonia and, for the last 14 km before draining into Lake Pihkva, in Pskov Oblast, Russia. For a 17-km-long section near Pechory Piusa is the border river between Estonia and the Russian Federation[1].
Piusa has the greatest drop of all Estonian rivers (214 meters).[2]