Sogna v/Gardhammarfossen (Sogna): discharge and water level

Sogna v/Gardhammarfossen (Sogna): discharge 28.7 m³/s (316% of mean flow), water level 1.84 m – below mean flood. Measured 23/10/2026, 21:00 CEST.

Now

28.7 m³/s below mean flood

Water level: 1.835 m (local datum) · Measured: 23/10/2026, 21:00 CEST · uncontrolled

Discharge, recent days (28–28.7 m³/s)

Mean flow (catchment statistic)9.1 m³/s
Mean annual flood95.8 m³/s
5-year flood123 m³/s
50-year flood202 m³/s

NVE flood statistics (culmination values) for 1937–2025.

Source: Data: NVE (Norges vassdrags- og energidirektorat), HydAPI · Licence: NLOD 2.0 · Updated 23/10/2026, 21:45 CEST. Raw data, mostly not yet quality-controlled by NVE. Not an official flood warning – see varsom.no.

🔔 Notify me E-mail on flood levels or your own threshold – not an official warning

Precipitation, last 7 days

10.9 mm fell at MET station Hønefoss - Høyby (13.2 km away).

2026-10-16: 0 mm16.02026-10-17: 0 mm17.02026-10-18: 0 mm18.02026-10-19: 0 mm19.02026-10-20: 0 mm20.02026-10-21: 1.2 mm21.1.22026-10-22: 9.7 mm22.9.7
Data: MET Norway (Frost API, SN20301) · NLOD 2.0 / CC BY 4.0 · daily values, provisional

Water body status (EU Water Framework Directive)

  • SOGNA MIDTRE NO012-2463-R
    Ecological status: good (2020) · Chemical: good
  • SOGNA MIDTRE BEKKEFELT SOER NO012-2729-R
    Ecological status: good (2021) · Chemical: not assessed
  • SOGNA MIDTRE BEKKEFELT NORD NO012-3326-R
    Ecological status: moderate (2021) · Chemical: good
    Good status expected: by 2027

Official assessment of the water body at this gauge from the 2022 river basin management plans (WFD target: at least “good”). It rates the whole water body, not today’s water quality.

EEA WISE – WFD 2022 (3rd RBMP), © EEA, CC BY 4.0