| abstracts | The construction of underground gas stores, on-going since October 2010, results in the production of brine discharged into the Puck Bay (south Baltic Sea). A rosette diffuser located 2300 m off-shore at a depth of 8 m, discharges at maximum of 300 m3 h−1, with saturation not exceeding 250 kg m−3. It consists of 16 risers, with 3 nozzles, 0.009 m in diameter each. Due to ecological restrictions, maximum salinity cannot exceed 9.2 PSU, while the excess salinity is limited to 0.5 PSU in the near field of the installation. Assessment of excess salinity can be done using two alternative approaches: analysis of in situ measurements, or analysis of brine parameters and discharge conditions. Continuous salinity measurements in a vertical located at the centre of the installation enable simple operational assessment of excess salinity; however, the velocity measured in situ can support interpretation of registered data. |