Man-induced morphological processes in Warta river (Poland), and their impact on the evolution of hydrological conditions

摘要

In the paper the overview of morphological processes occurring in the selected Warta river reach is given. The processes were induced by the performance of the Jeziorsko dam, which was built in 1986. The main purpose of the presented research is the assessment of these processes impact on the hydrologic conditions in the river system. The historical data and hydrodynamic simulation model are used for the assessment of the hydrologic changes. The data consists of field measurements of the river morphology and hydrologic data from the selected river gages. The hydrodynamic model was used to reconstruct the flow conditions in particular states of the river system evolution. The statistical analysis of the obtained results enabled the assessment of the hydrologic characteristics transformation in the selected Warta river reach. The results are presented as relative and cumulative curves related to the estimated stages of the river system. The presented analyses shows significant changes of the hydrologic regime in the considered area.