Poradniki / River & water levels

River & water levels

Shows hydrological gauge readings for rivers — water level, discharge, the short-term trend (rising / falling / steady), and each station’s official flood-warning threshold bands — as an offline-first map overlay. It’s the raw quantitative layer under the weather warnings, for people who read a gauge (paddlers, riverside hikers). Coverage today: Poland, Germany, the Netherlands, Czechia.

Before you start

• No separate download — gauge data refreshes over the internet like weather does. The last fetched readings are cached and shown offline with a staleness banner.

Do this

1. On the map, open the layer / filter control and turn on Rivers & water.
2. Measuring-point markers appear, coloured by threshold band (how high the river is against its official warning ladder), with halos.
3. Tap a marker for the popup: level (cm/m above the station’s datum), discharge (m³/s where available), the trend, the threshold bands, a sparkline, and an “as of…” banner.

Good to know

• Refreshes roughly every 30 minutes on the backend; the app fetches the latest and caches it.
• Levels aren’t comparable between stations — a raw “213 cm” is above each station’s local datum, meaningless without that station’s threshold bands (which is why the popup always shows the bands).
• Threshold models differ by country — PL stan ostrzegawczy / alarmowy, DE Meldestufen, CZ SPA 1/2/3; NL flood safety is dyke/norm-based rather than a simple per-gauge alarm ladder.
• This is observed gauge data, not a flood forecast. It shows a river climbing; it is not an official flood warning or an evacuation tool (see Terms). Data comes from each national hydrology service (IMGW-PIB, PEGELONLINE/WSV, Rijkswaterstaat, ČHMÚ — credited on data sources).

If something’s off

• No markers → you’re offline with no cached copy yet, or outside PL/DE/NL/CZ.
• “As of” is old → you’re offline; the banner shows the last successful refresh time.