Abstract
The rectangular free overfall serves as a common control structure in subcritical flows, due to the presence of a critical section where a definite depth vs. discharge relationship is known to exist. In fact, due to the significant flow curvature near the brink, the brink depth, yb, is less than the critical depth, yc,computed on the basis of parallel flow for a given discharge, Q. The critical depth section is observed to lie at a distance of about 3–4 yc upstream of the brink. Since the establishment of a dependable correlation between Q and yb is essential for the practical use of the overfall as a control structure, the need for an accurate estimation of the ratio yb/yc under known flow conditions is evident.
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References
Andreou, S.A. (1980) Free overfall for subcritical upstream flow. Diploma Thesis, Dept. of Civil Engineering, Natl. Tech. Univ. of Athens.
Bauer, S.W.,and Graf, W.H. (1971) Free overfall as a flow measuring device. J. Irrigation and Drainage Div., ASCE, 97, IR1: 73–83.
Delleur, J.W., Dooge, J.C.I., and Gent, K.W. (1956) In- fluence of slope and roughness on the free overfall. J. Hydraulics Div., ASCE, 82, HY4, Proc. Paper 1038; 30–35.
Kraijenhoff, D.A., and Dommerholt, method in rectangular channel. J. Div., ASCE, 103, IR2: 171–177.
Markland, E. (1965). Calculation of flow at a free overfall by relaxation method. I.C.E. A. paper 6869: 71–78.
Rajaratnam, N., and Muralidhar, D. (1968). Characteristics J. fo the rectangular free overfall. J. Hydraulic Research,o 6, 3: 233–258.
Replogle, J.A. (1962) Discussion, End depth at a drop in trapezoidal channels, by M.H. Diskin. J. Hydraulics Divi-sion, ASCE, 88, HY2: 161–165.
Rouse, H. (1936) Discharge characteristics of the free overfall. Civil Engineering, 6, 4: 257–260.
Smith, C.D. (1972) Discussion, Free overfall as flow mea- suring device, by S.W. Bauer and W.H. Graf, J. Irrigation and Drainage Division, ASCE, 98, IR1: 162–164.
Strelkoff, T.,and Moayeri, M. (1970) Pattern of potential flow in a free overfall. J. Hydraulics Division, ASCE, 96, HY4: 879–901.
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© 1984 Springer-Verlag Berlin Heidelberg
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Christodoulou, G.C., Noutsopoulos, G.C., Andreou, S.A. (1984). Factors Affecting Brink Depth in Rectangular Overfalls. In: Smith, K.V.H. (eds) Channels and Channel Control Structures. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-11300-4_1
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DOI: https://doi.org/10.1007/978-3-662-11300-4_1
Publisher Name: Springer, Berlin, Heidelberg
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