Patterns of Recent Changes in Channel Morphology and Flows in the Upper and Middle Odra River

Our research introduces the river regulation effects on three sections of upper and middle Odra River (south-western Poland), with differently channelized parts. In lower reaches, was straightened, narrowed, trained groins, whereas in section, it also impounded by numerous barrages. The discharge duration (DD) water stage (WSD) curves for water-gauge stations from these were analyzed to recognize changes flows channel morphology since mid-20th century. This analysis is supplemented an examination repeated surveys gauge cross river, annual precipitation totals its catchment, their relationship variation North Atlantic Oscillation (NAO) index. findings provide new hydrological insights region. exhibited different patterns adjustment channelization: section typified incision, stability, incision part vertical stability bed part. Barrages stabilized stages a wide range conditions. Annual run-off did not change systematically over study period. inversely related values NAO confirms usefulness DD/WSD analyze position bed.