Understand the numbers
Understanding levels, discharge and change
Measurements show the current situation. These guides explain units, useful comparisons and the limits of the data.
New · Lake atlas
Why every lake responds differently
Detailed portraits explain inflows, outlets, regulation, annual rhythm and temperature, separate from the compact live pages.
River atlas
Water pathways, regulation and monitoring locations: understand why readings on the same river vary between reaches.
Basics · Water level
How to read a water level
Reading the level, gauge datum, trend and seasonal median correctly – with practical examples for lakes and rivers.
Read guide →Basics · Rivers
What does discharge in m³/s mean?
Cubic metres per second explained clearly: water volume, measurement, comparisons and typical mistakes with river data.
Read guide →Interpretation · Extremes
Reading high and low water correctly
What drives high and low values, why trends matter and why a median does not replace an official warning level.
Read guide →Reference · Terms
Glossary: level, discharge and water data
The key terms around water level, discharge, stations, median, forecasts and data quality, briefly explained.
Read guide →Transparency · Methods
Methods and data quality at Seepegel
How Seepegel takes over official measurements, displays units, computes reference values and handles missing data.
Read guide →Use real measurements
Then open a lake or river and compare its current value, timestamp and trend. Every station links to its original source.