Abstract
The aim of this paper is to introduce results of an experimental research of a spillway with a wide threshold. To identify this spillway main characteristics the authors use traditional methods of hydraulic calculations. The paper presents experimental data of a spillway with a wide threshold at δ/H>8...10 which were obtained on a hydraulic tray in the laboratory of hydro technical structures and structural engineering of Don State Agrarian University named after A.K. Kortunov. The research demonstrates basic dependences for the event of water leakage through a spillway with a wide threshold for a fl at stress problem. The obtained values of discharge coefficient for a spillway with a wide threshold at δ/H>8...10 are within the limits of 0,303≤mспр≤0,305 with a relative error 0.0242-0.0076%. Taking in account experimental studies and using a well-known formula by H.А. Tibara the authors specified the dependence for calculating discharge coefficient for a spillway with a wide threshold. The experimental results were mathematically processed by Microsoft Excel, and a new empirical dependence m=f(P/H) was introduced.
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