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Monitoring drivers and externalities that effect the oxygenation

The continuous monitoring of drivers and externalities that may affect the

demonstration unit operation and expected results is an important part of the

monitoring task.

Wave parameter
Measurements of wave heights and directions are necessary to monitor the induced changes of the imposed enhanced ventilation/mixing of hypoxic bottom water layers. Further, measuring the response of the bottom dynamics during such a series of intermittent stagnation periods provides a methodology to analyze the short-term ecological response to the artificial supply of oxygen separated from influences of water exchange.
Wave parameters are measured by the use of wave buoys that measure wave height, period, direction spectra and surface water temperature. These buoys have been used for many years for instance by the Swedish Meteorological and Hydrological Institute (SMHI).

Sill currents
Due to the fact that the Kanholmsfjärden system is a semi-closed system that has a sill connection to the Södra Möjafjärd current measurements along that sill have to be carried out in order to monitor flows across that sill. For this an Acoustic Doppler Current Profiler (ADCP) is used in the project. The ADCP has been widely utilized and numerous examples can be found that show that the ADCP is the best choice for current monitoring.

Weather conditions
Weather conditions are monitored by the use of simple weather stations and visual means at the relevant locations. This will enable a better control of the demonstration units during the demonstration phase as well as it will help during the evaluation of the operation and effects of the pumps.

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