RECONSTRUCTION OF PERIODS WITH HIGH SPRING FLOODS OF THE TURA RIVER BASED ON ANNUAL RINGS OF POPULUS NIGRA L.

Tree rings of poplar are an important source of data for studying the dynamics of water discharge and floods on the Tura River. A tree-ring chronology based on the width of tree rings of Black Poplar (Populus nigra L.) was constructed for about 150 years. Correlation analysis between the tree-ring width chronology, water discharges of the Tura River (at the Turinsk hydrographic post) and weather and climate variables (air temperature, precipitation) revealed significant positive relationships with water discharges corresponding to the period of spring floods and May air temperature. No relationships were found between the chronologings and precipitation in individual months. Based on the tree-ring chronology of poplar, a reconstruction of water discharges in May for 1875–2022 was performed. The years of high and low spring floods and their impact on the radial growth of poplar are discussed.