Author(s): Maria Baginska; Wojciech Majewski
Linked Author(s): Wojciech Majewski
Keywords: No Keywords
Abstract: Ice formation on impounding reservoirs is a very complicated physical process which depends on meteorological conditions, bed morphology, and channel flow. Ice cover can vary significantly in space and time and thus considerably influence flow regime resulting very often in high water stages and even flooding. Extensive field measurements were carried out over several years on impounding reservoir Wloclawek on Vistula River. These measurements included water temperatures, ice cover thickness and character, water stages, and their changes with time. Several mathematical models were formulated for the calculation of ice cover appearance and backwater profiles under various discharge and ice cover characteristics. Elongated shape of the reservoir allows to assume 1 -dimensional approach based on real morphology (in the form of cross-sections). The paper presents the description of the impounding reservoir, data from field measurements (water temperatures, ice cover characteristics, water stages), formulation of mathematical models for the calculation of water temperatures in the reservoir, formation of various kinds of ice and increase of ice cover thickness. Results of calculations are based on the assumption of steady nonuniform flow.
Year: 1990