To understand the discharge pathes of the river Odra and to verify numerical models, hydrographic and meteorological measurements are carried out in the Odra lagoon. 3 fixed stations (2 piles and a pontoon in the Kleines Haff) measure the following parameters: current (2 components), sea level and wave height, pressure at sensor level, water temperature, turbidity, conductivity, fluorescence, wind speed, wind direction, air temperature, atmospheric pressure.