STM Journals Peer-reviewed research from Consortium e-Learning Network

Journal of Water Resource Engineering and Management

Estimation of Discharge Over the Compound Sharp-Crested Weir using Artificial Neural Networks and Genetic Programming

  1. Akram Abbaspour

Abstract

Truncated sharp crested weirs are used to measure flow rate and to control water surface upstream, in irrigation canals and laboratory flumes. The main advantages of such weirs are, ease of construction and capability of measuring a wide range of flows with sufficient accuracy. Artificial neural networks (ANNs) and genetic programming (GP) have recently been used for the estimation of hydraulic data. In this study, they were used as alternative tools to estimate the discharge of flow over truncated weirs. The hydraulic parameter, including water flow rate Q was determined as functions of the width of crest b, upstream head h, weir height P1, the height of triangular weir P2 and width of flume B. The estimations of the ANN and GP models were found to be in good agreement with the measured data. The results of the ANN model were compared with those of the GP1, GP2, GP3 and GP4 models, showing that the proposed ANN models are much more accurate than the GP models and GP4 model has better performance than GP1, GP2 and GP3 models.
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