Estimation of Discharge Coefficient of Triangular Side Orifices using Generalized Structure Group Method of Data Handling

Document Type : Original Article

Authors

1 Ph.D. Candidate, Department of Water Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

2 Department of Water Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

3 Associate Professor, Department of Water Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

Abstract

In the study, the discharge coefficient of triangular side orifices is modeled by a new evolutionary algorithm entitled "generalized structure group method of data handling (GSGMDH)". Initially, the variables affecting the discharge coefficient are discerned and six different GSGMDH models are defined. After that, the experimental data are divided into two sub-groups, meaning that 70% of the experimental measurements are used for training and 30% for testing. Then, the superior model is introduced through the analysis of all GSGMDH models. This model estimates the discharge coefficient values with remarkable accuracy. For example, in the testing mode of the superior model, the correlation coefficient (R), Scatter Index (SI) and the Nash-Sutcliff proficiency coefficient (NSC) are calculated 0.999, 0.0008 and 0.999, respectively. Furthermore, the sensitivity analysis of the input parameters reveals that the Froude number (F1) and the ratio of the main channel width to the side orifice length (B/L) are the most effective input parameters. After that, the results yielded by the GSGMDH superior model are compared with the GMDH results to prove that the accuracy of the GSGMDH model is higher

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References

Azimi, H., H. Bonakdari, and I. Ebtehaj. 2019. Design of radial basis function-based support vector regression in predicting the discharge coefficient of a side weir in a trapezoidal channel. Applied Water Science, 9(4): 1-12.
Azimi, H., H. Bonakdari, I. Ebtehaj, B. Gharabaghi, and F. Khoshbin. 2018. Evolutionary design of generalized group method of data handling-type neural network for estimating the hydraulic jump roller length. Acta Mechanica, 229(3): 1197-1214.
Ebtehaj, I., H. Bonakdari, and B. Gharabaghi. 2018. Development of more accurate discharge coefficient prediction equations for rectangular side weirs using adaptive neuro-fuzzy inference system and generalized group method of data handling. Measurement, 116: 473-482.
Ebtehaj, I., H. Bonakdari, F. Khoshbin, and H. Azimi. 2015. Pareto genetic design of group method of data handling type neural network for prediction discharge coefficient in rectangular side orifices. Flow Measurement and Instrumentation, 41: 67-74.
Eghbalzadeh, A., M. Javan, M. Hayati, and A. Amini. 2016. Discharge prediction of circular and rectangular side orifices using artificial neural networks. KSCE Journal of Civil Engineering, 20(2): 990-996.
Guo, J. C., and R. P. Stitt. 2017. Flow through partially submerged orifice. Journal of Irrigation and Drainage Engineering, 143(8): 06017006-1-3.
Hashid, M., A. Hussain, and Z. Ahmad. 2015. Discharge characteristics of lateral circular intakes in open channel flow. Flow Measurement and Instrumentation, 46: 87-92.
Hussain, A., Z. Ahmad, and C. S. P. Ojha. 2016. Flow through lateral circular orifice under free and submerged flow conditions. Flow Measurement and Instrumentation, 52: 57-66.
Ivakhnenko, A. G. 1976. The group method of data handling in prediction problems. Soviet Automatic Control, 9(6): 21-30.
Majedi Asl, M., Fuladipanah, M., Daneshfaraz, R., Jannat, K. 2021. Modeling and assessment of discharge coefficient of arc labyrinth weir using experimental and meta-model methods. Iranian Journal of Soil and Water Research, 10.22059/IJSWR.2021.322432.668943.
Roushangar, K., Alirezazadeh Sadaghiani, A., Shahnazi, 2021. Modeling discharge coefficient of radial gates under submerged conditions using kernel-based approaches. Iranian Journal of Irrigation and Drainage, 15(85): 109-120.
Vatankhah, A. R., and S. H. Mirnia. 2018. Predicting Discharge Coefficient of Triangular Side Orifice under Free Flow Conditions. Journal of Irrigation and Drainage Engineering, 144(10): 04018030-1-16.

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