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Current and Flow Measurements

We carry out current and flow measurements on a wide range, from the smallest channels and water networks, to studies covering the current profile of the entire aquifer of large marine areas.

We have a comprehensive range of proven, year-round operation capable instruments that reliably measure flow conditions even under ice cover.

Flow Measurements

Both acoustic and pressure-based instruments are available for measuring flow in open pits, pipelines and networks. Acoustic instruments are best used in constructed channels, pipes and open ponds where flow conditions are as laminar as possible. In contrast, surface level based flow determination can be used in areas where no damming occurs and where the discharge curve linked to the surface level can be reliably determined.

Acoustic methods are also used for river flow measurements and for calibration measurements of power plant and dam flowrates, where measurement repeatability is of great importance.

Measurements of Currents

Measurement of currents in marine, lake and river basins is carried out with acoustic devices profiling the entire water body vertically or horizontally. This will provide a comprehensive time series of the variation of currents in different water layers and across the cross-section of the channel or strait.

The current measurements are used, for example, in the permitting of hydro-engineering projects, studies of cooling and waste water intake and discharge areas, suitability studies of marine disposal sites and validation of current modelling. In operational use, current measurements serve navigation in places where conditions are known to be challenging and where current velocities or directions can change rapidly, making navigation in the waterway difficult.

In addition to currents, acoustic measurements allow monitoring of wave height and direction as well as ice cover thickness and ice field movement.

Read more about services for ports.