Assessment of land use and water management induced changes in flow regime of the Upper Narew

► We study an influence of land use change and reservoir operation on the Upper Narew flows. ► We propose an integration of different approaches to analyzing the changes in flow regime and catchment response. ► Separation of climatic variability from human induced changes is performed using a control catchment. ► The multi-method approach allows for the quantitative evaluation of flow changes in a lowland catchment.