Application

• 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

Solution

• 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.