Szukana fraza: [Abstract = To hold back the unfavourable changes caused by defective regulation of the Smortawa river, which is the right\-bank tributary of Odra river, there was built the movable weir \"Hanna\" on her 5\+050 km. Earlier the Smortawa river wasn't controlled and it was described by a hydrological analogy to Widawa river \(water\-gauge Michalice\). The goal of investigations is to show hydrological regime of the Smortawa river in changing piling up conditions. To reach the intentional aim authors did hydrometric measurements.]