Przebieg procesu erozji poniżej zbiornika Jeziorsko na rzece Warcie

This paper is devoted to the erosion process downstream the Jeziorsko reservoir on Warta river. It presents a short characteristic of Jeziorsko reservoir and water management and also hydrologic characteristic of Warta River. Results of measurements in situ in the period 1975–2007 are presented. River bottom levels and water levels in cross sections were measured. The characteristic of river bottom material is presented. Results of measurements before the construction of the reservoir are compared with of investigations results during reservoir operating time. The erosion process downstream the Jeziorsko reservoir causes the decrease of bottom and water levels in Warta River. The grain size of the river bed material increase because of the erosion process. To counteract the erosion process two sills were designed and realized. The impact of sills on of erosion process conditions in Warta River bed is presented in this article.