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.
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.