Olza river
Also known as: Olsa, Olše
The Olza (also known as Olsa, Olše) is a European river flowing through Poland. As of 2026-10-09, the Olza was flowing at about 2.048 m³/s at the Dětmarovice gauge.
- Canonical name
- Olza
- Local names / aliases
- Olsa, Olše
- Countries
- Poland
- Maximum upstream drainage area
- 1,119 km²
- Mapped river length
- 35.3 km
- Gauging stations
- 4
- Latest measured discharge
- 2.048 m³/s (Dětmarovice, 2026-10-09)
Gauging stations on the Olza
The following 4 gauging stations report discharge for the Olza, ordered downstream (largest catchment first). Discharge is in cubic metres per second (m³/s).
| Station | Country | Discharge (m³/s) | Historical Comparison | Observed | Measurement | Data quality | Provider | Lat, Lon | Source |
|---|---|---|---|---|---|---|---|---|---|
| Dětmarovice | Czech Republic | 2.048 | Much below normal58% below the historic median | instantaneous | CHMI operational data | Czech Hydrometeorological Institute | 49.883, 18.487 | source | |
| Gołkowice | Poland | 0.58 | Below normal46% below the historic median | instantaneous | operational value | IMGW-PIB | 49.926, 18.496 | source | |
| Łaziska | Poland | 5.19 | Much below normal70% below the historic median | instantaneous | operational value | IMGW-PIB | 49.924, 18.443 | source | |
| Věřňovice | Czech Republic | 3.98 | Much below normal48% below the historic median | instantaneous | CHMI operational data | Czech Hydrometeorological Institute | 49.931, 18.419 | source |
Related rivers
Data, sources & timestamps
Geometry is the HydroRIVERS network (HydroSHEDS): European reaches with at least 500 km² of upstream catchment, merged into chains between confluences. Flow direction comes from the network itself; river names are the canonical English label joined from provider metadata and Natural Earth, with local-language aliases retained.
Discharge is normalised observed streamflow from official national hydrology providers, measured where a gauge sits on the river and interpolated between gauges. Pale/estimated values are derived from drainage area × the local specific discharge of nearby gauges and are never presented as measurements.