Discharge Prediction in Smooth Trapezoidal Free Overfall—(Positive, Zero and Negative Slopes)
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Volume 119, Issue 2
Abstract
This paper presents a calibration curve using dimensionless parameters and for the prediction of discharge with the help of known end‐depth and vice versa. The curve is based on published experimental data of different investigators for smooth trapezoidal free overfall in horizontal as well as sloping channels (both positive as well as negative slopes). The curve, best fitted to the data, shows an excellent agreement between the observed and predicted values of discharge with a correlation coefficient equal to 0.99753. The regression equation of the calibration curve has, also, been tested for unused data and an excellent agreement is obtained between the two. Furthermore, it is also observed that for horizontal channels, the theoretical value of the constant (i.e., slope) in the equation of the straight line is greater than that obtained from the present investigation based on experimental data, where and . The constant obtained in this work gives better results as compared to that obtained in previous research.
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Copyright © 1993 American Society of Civil Engineers.
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Received: Jan 8, 1992
Published online: Mar 1, 1993
Published in print: Mar 1993
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