Flowing Waters - Flood Protection

Seepage Measurement in Dam

Seepage measurement in dam
Outside and inside views of dam wall
Seepage measurement in dam


  • Dam wall 130 years old, approx. 500 m length, made of quarry stone with clay core
  • Gallery inside of dam wall to check seepage volumes
  • Seepage volumes ranging from ml/s to l/s
  • Currently seepage water volumes are manually determined once per week

Definition of tasks

  • Detection of low volumes of seepage water within the dam gallery for continuous monitoring and early warning prior to dam break in case of increasing seepage volumes
  • Sensor installation in dam interior with 100% humidity
  • Continuous evaluation of flow rates and monitoring outside of the dam area in a distance of approx. 1000 m in control cabinet
Seepage measurement in dam
Installation principle
Seepage measurement in dam


  • A flow measurement system Type NivuFlow 750 was used.
  • The low flow volumes were combined using a pipe DN 100. A cross correlation pipe sensor detects the very low flow volume inside of the full pipe within a few mm.
  • A water-proof installed MPX preamplifier transmits the flow velocity signals  measured on site to the transmitter in a distance of 1000 m.


  • Reliable transmission of signals to the transmitter over a distance of 1000 m
  • Permanent monitoring of the old construction ensures the safety of the people living behind the dam

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