river flow · Hungary
Danube at Budapest
September mean discharge
Modelled demonstration series · not observed data
Low Danube water exposes the hunger stones — boulders carved in previous droughts with the years they surfaced and warnings for whoever saw them next. They are a genuine historical record of extreme low water, and they are also the reason this river's droughts are documented further back than its gauges go.
75 years, modelled
Same reading, two normals
| Normal | Mean | σ | Pct | Return |
|---|---|---|---|---|
| 1951–1980 | 1980 m³/s | −1.10σ | 14th | 1 in 7.4 years |
| 1991–2020 | 1770 m³/s | −0.85σ | 20th | 1 in 5.1 years |
Today would rank 13 of 76 for lowest value in the modelled series. Nothing about the reading changes between rows — only the yardstick.
The season here
September is normally the Danube's low-water month before the autumn rains; it is when the river's margin is thinnest.
Where this series comes from
MODELLED SERIES — not observed. Parameters set from published Budapest gauge September discharge climatology; lognormal transform applied. The 75 annual values are synthesised by the seeded generator.
Every number on this page comes from a modelled series: 75 annual values synthesised by a seeded generator from published climatological parameters for Danube at Budapest. It shows how anomaly reasoning works. It is not a measurement and must not be cited as one.
How to read σ
σ counts standard deviations from this place's own normal. The sigma guide · return periods.
More river flow stations
Open Danube at Budapest on the field →