Theoretical End-Depth-Discharge Relationship for Free Overfall
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Volume 125, Issue 1
Abstract
Despite the many theoretical and experimental studies carried out in channels having different cross-section shape, slope, and roughness, the problem of the free overfall as a flow measuring device has not been completely solved, and other experiments are needed. A theoretically based end-depth-discharge relationship is obtained for both subcritical and supercritical flow in rectangular, triangular, and trapezoidal channels. For each cross-section shape, discharges predicted using the theoretical relationship are compared with the available experimental data.
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References
1.
Ali, K. H. M., and Sykes, A. (1972). “Free-vortex theory applied to free overfall.”J. Hydr. Engrg., ASCE, 98(5), 973–979.
2.
Anastasiadou-Partheniou, L., and Hatzigiannakis, E. (1995). “General end-depth-discharge relationship at free overfall in trapezoidal channel.”J. Irrig. Drain. Engrg., ASCE, 121(2), 143–151.
3.
Bauer, S. W., and Graf, W. H. (1971). “Free overfall as flow measuring device.”J. Irrig. Drain. Engrg., ASCE, 97(1), 75–83.
4.
Delleur J. W., Dooge, J. C., and Gent, K. W. (1956). “Influence of slope and roughness on the overfall.”J. Hydr. Engrg., ASCE, 82(4), 1038-30–1038-35.
5.
Diskin, M. H. (1961). “End depth at a drop in trapezoidal channels.”J. Hydr. Div., ASCE, 87(4), 911–932.
6.
Fathy, A., and Shaarawi, M. A. ( 1954). “Hydraulics of the free overfall.” Proc. ASCE, 80, No. 564, New York.
7.
Ferreri, G. B., and Ferro, V. ( 1990). “Efflusso non guidato di una corrente lenta da un salto di fondo in canali a sezione rettangolare.” Proc., XII Convegno di Idraulica e Costruzioni Idrauliche, Cosenza, 195–213 (in Italian).
8.
Ferro, V. (1992). “Flow measurement with rectangular free overfall.”J. Irrig. Drain. Engrg., ASCE, 118(6), 956–964.
9.
Gill, M. A. (1979). “Hydraulics of rectangular vertical drop structures.”J. Hydr. Res., 17(4), 289–302.
10.
Gupta, R. D., Jamil, M., and Mohsin, M. (1993). “Discharge prediction in smooth trapezoidal free overfall—(positive, zero, and negative slopes).”J. Irrig. Drain. Engrg., ASCE, 119(2), 215–224.
11.
Hager, W. H. (1983). “Hydraulics of plane free overfall.”J. Hydr. Engrg., ASCE, 109(12), 1683–1697.
12.
Keller, R. J., and Fong, S. S. (1989). “Flow measurements with trapezoidal free overfall.”J. Irrig. Drain. Engrg., ASCE, 115(1), 125–136.
13.
Kraijenhoff, D. A., and Dommerholt, A. (1977). “Brink depth method in rectangular channel.”J. Irrig. Drain. Engrg., ASCE, 103(2), 171–177.
14.
Marchi, E. (1993). “On the free overfall.”J. Hydr. Res., 31(6), 777–790.
15.
Markland, E. ( 1965). “Calculation of flow at free overfall by relaxation method.” Proc., Inst. of Civ. Engrg., 31, May, 71–78.
16.
Neogy, B. N. (1972). “Brink depth for trapezoidal broad crest weir.”J. Hydr. Engrg., ASCE, 98(12), 2171–2189.
17.
Paderi, F. ( 1954). “Sulla chiamata di sbocco (Notizie preliminari su rilevamenti per canali a fondo orizzontale.” L'Energia Elettrica, 10, 742–748 (in Italian).
18.
Paderi, F. ( 1956). “Sulla chiamata di sbocco in canale a fondo declive.” L'Energia Elettrica, 8, 792–800 (in Italian).
19.
Paderi, F. ( 1959). “Sulla chiamata di sbocco in canale a fondo acclive.” L'Energia Elettrica, 10, 883–888 (in Italian).
20.
Paderi, F. ( 1961). “Correnti in arrivo veloci in zona terminale di canale a forte pendenza prossima alla critica.” L'Energia Elettrica, 10, 874–881 (in Italian).
21.
Pagliara, S., and Viti, C. (1995). “Discussion of `Discharge prediction in smooth trapezoidal free overfall—(positive, zero, and negative slopes),' by R. D. Gupta, M. Jamil, and M. Mohsin.”J. Irrig. Drain. Engrg., ASCE 121(1), 128–130.
22.
Peruginelli, A. ( 1980). “Chiamata di sbocco in sezione triangolare.” Idrotecnica, 6(2), 63–72 (in Italian).
23.
Rajaratnam, N., and Muralidhar, D. (1964a). “End depth for circular channels.”J. Irrig. Drain. Div., ASCE, 90(2), 90(2), 90–119.
24.
Rajaratnam, N., and Muralidhar, D. (1964b). “End depth for exponential channels.”J. Irrig. Drain. Div., ASCE, 90(1), 17–39.
25.
Rajaratnam, N., and Muralidhar, D. (1970). “The trapezoidal free overfall.”J. Hydr. Res., 8(4), 419–447.
26.
Rouse, H. ( 1936). “Discharge characteristic of the free overfall.” Civ. Engrg., ASCE, 6(4), 257–260.
27.
Rouse, H. ( 1943). “Discussion of `Energy loss at the base of the free overfall,' by W. L. Moore.” Trans. ASCE, 108, Paper No. 2204, 1383–1387.
28.
Rouse, H. ( 1949). Engineering hydraulics. Wiley, New York.
29.
Smith, C. D. (1962). “Brink depth for a circular channel.”J. Hydr. Engrg., ASCE, 89(6), 125–134.
30.
Terzidis, G., and Anastasiadou-Partheniou, L. (1990). “Discussion of `Flow measurement with trapezoidal free overfall,' by R. J. Keller and S. S. Fong.”J. Irrig. and Drain. Engrg., ASCE, 116(6), 860–862.
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Published online: Jan 1, 1999
Published in print: Jan 1999
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