Estimation of the influence of stabilization sills in the Warta river bed downstream of the Jeziorsko reservoir
Summary. The longitudinal erosion process has been observed downstream of the Jeziorsko reservoir for 23 years, since the dam was built (1983). In the paper the measurements and observations of the Warta river bed morphology are presented and compared with the historical data. The longitudinal erosion process has been observed in the reach of 19 km length (from km 484 to 465). The Warta river bottom and water surface elevation were significantly decreased. The historical and current hydraulic conditions are also discussed in the paper. The presented comparison analysis are done no the basis of measured water surface elevation and river bottom profiles during the control discharge Q = 33 m3/s. Just downstream of the dam the differences between past and current river bottom levels are about 1.95 m. The estimated average annual decrease of bottom and water surface elevation is about 9.3 cm/year. In addition the observed maximum depth of the local scour below the dam stilling pool is 7.7 m. The reported changes may dramatically influences the conditions of dam and hydro-power plant and weir just downstream of the dam performance. In order to stop the erosion process downstream of the existing weirs, located just downstream of the dam, two additional stabilization sills were built, nr 3 in km 480+900 and nr 4 in km 479+225. After one year of exploitation the sills stabilizing water surface level as it is observed in 2004.
Key words: reservoir, dam safety, erosion process, river processes
Full text available in Polish in Adobe Acrobat format:https://www.npt.up-poznan.net/pub/art_1_30.pdf
For citation:
| MLA | Przedwojski, Bogusław, and Michał Wierzbicki. "Skutki działania progów stabilizujących w korycie Warty poniżej zbiornika Jeziorsko." Nauka Przyr. Technol. 1.2 (2007): #30. |
| APA | Bogusław Przedwojski, Michał Wierzbicki (2007). Skutki działania progów stabilizujących w korycie Warty poniżej zbiornika Jeziorsko. Nauka Przyr. Technol. 1 (2), #30 |
| ISO 690 | PRZEDWOJSKI, Bogusław, WIERZBICKI, Michał. Skutki działania progów stabilizujących w korycie Warty poniżej zbiornika Jeziorsko. Nauka Przyr. Technol., 2007, 1.2: #30. |
Corresponding address:
Bogusław Przedwojski
Bogusław Przedwojski
Katedra Budownictwa Wodnego
Akademia Rolnicza im. Augusta Cieszkowskiego w Poznaniu
ul. Wojska Polskiego 73A
60-625 Poznań, Poland
e-mail: bkpi@au.poznan.pl
Bogusław Przedwojski
Bogusław Przedwojski
Katedra Budownictwa Wodnego
Akademia Rolnicza im. Augusta Cieszkowskiego w Poznaniu
ul. Wojska Polskiego 73A
60-625 Poznań, Poland
e-mail: bkpi@au.poznan.pl
Accepted for print: 10.05.2007