DISCHARGE RATING CURVE AND SCALE EFFECTS CORRECTION IN MORNING GLORY SPILLWAYS
Dam spillways are the structures that lead rightly and safely the outflow downstream, so that the dam integrity can be guaranteed. Many accidents with dams have been caused by an inadequate spillway design or insufficient capacity. This situation is particularly important in embankment or rockfill dams, because the possibility of overtopping failure of the dam. The morning glory spillway may be used when there is not available space for a conventional spillway. Engineers use physical modeling to design this kind of structures, and therefore scale effects can cause a difference between model and prototype discharge rating curve. This paper has the objective of analyze the discharge flow rating curve in a vertical shaft with morning glory inlet and to correct scale effects for low heads. An experimental study has been carried out, using the spillway model of Paraitinga Dam in 1:51,02 scale. As a result equations are proposed in order to correct the discharge coefficient in the discharge rating curve for low heads.
morning glory spillway shaft bend discharge flow rating
Laura Maria Canno Ferreira Fais Ana Inés Borri Genovez
Architecture and Urbanism College, University of Campinas (UNICAMP), PO Box 6021,13083-852, Campinas Civil Engineering, Architecture and Urbanism College -University of Campinas, PO Box 6021,13083-852,
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
2041-2046
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）