River levels are measured continuously at gauge stations along rivers and canals. They are essential for flood warning, navigation, water management, and ecology. Levels are usually expressed in centimetres relative to a national datum—in the Netherlands, NAP (Normaal Amsterdams Peil). A rising level can indicate recent rainfall or snowmelt upstream; falling levels often follow dry weather or reduced runoff.

Trend (rising, falling, or steady) is derived from recent measurements and helps assess whether the situation is stabilising or changing. In the Netherlands, Rijkswaterstaat operates a dense network of gauges and publishes alarm levels (e.g. alarm 1, 2, 3) for many stations. When levels approach or exceed these thresholds, authorities may issue warnings or take measures. The data on this page is updated periodically from Rijkswaterstaat WaterWebservices.

River flow is influenced by precipitation, snowmelt, soil moisture, and human interventions (dams, locks, drainage). Large rivers such as the Rhine and Meuse have long response times; small catchments can rise and fall within hours. The readings here are real-time measurements, not forecasts. For official flood and drought information, always refer to Rijkswaterstaat and the national crisis and water management authorities.

Did you know? At Lobith, where the Rhine enters the Netherlands, the average discharge is about 2,200 cubic metres per second—roughly one Olympic-sized swimming pool every second. During major floods, discharge can exceed 12,000 m³/s.