HaktanIr, TefarukKhalaf, Mohammed A.2025-02-242025-02-2420211300-345310.18400/tekderg.5406402-s2.0-85164666346https://doi.org/10.18400/tekderg.540640https://search.trdizin.gov.tr/tr/yayin/detay/535207https://hdl.handle.net/20.500.14440/1016Using the measured data on 15 laboratory models in USA, six models and one prototype in Turkey, the discharge coefficients (C's) of radial-gated ogee spillways for various gate openings and lake water surface elevations are computed. Comparison of these C's for 22 spillways with the ones given by Figure 9-31 of Design of Small Dams does not show close agreements. It is determined that C depends on both the angle O and the ratio d/H-1, rather than O only where d and H-1 are the gate opening and the upstream head, and statistically significant regression equations are computed individually for each one of 22 cases.eninfo:eu-repo/semantics/openAccessDischarge coefficient for partially-opened radial-gated spillwaysArticle109454N/A1091953520732WOS:000692716800002Q4