assessment of the effect of the hydraulic and geometric parameters on the discharge coefficient of the labyrinth weirs Using the experimental method and intelligent algorithms

Subject Areas : Article frome a thesis

Mahdi Majedi-Asl ¹ , mehdi fuladipanah ² , Rasul daneshfaraz ³ , khalil jannat ⁴

1 - Associate Professor, Department of Civil Engineering, University of Maragheh, Maragheh, Iran
2 - Assistant Professor, Department of Civil Engineering, Ramhormoz Branch, Islamic Azad University, Ramhormoz, Iran
3 - Professor, Department of Civil Engineering, University of Maragheh, Maragheh, Iran
4 - MSc Student, Department of Civil Engineering, University of Maragheh, Maragheh, Iran

Received: 2021-07-15 Accepted : 2022-06-11 Published : 2022-04-21

Keywords: dimensional analysis, Weir performance improvement, data-based algorithm, flow coefficient,

Abstract :

Non-linear weirs have more passing length than linear ones for a certain value of flow width, so they have more utilization for water surface adjustment, flow control in channels, rivers, and dam reservoir purposes. Labyrinth weir is a common type of non-linear weir that has been considered by researchers in recent decades. The effect of some geometric and hydraulic characteristics appears as discharge coefficient in the head-discharge relationship. For the same conditions, the higher the discharge coefficient, the more flow will pass over the weir. The experimental study is one of the methods to determine the effect of parameters on the discharge coefficient value. Due to the occurrence of complex phenomena that can not be measured or the existence of physical limitations in the laboratory, the use of intelligent artificial methods has become a growing trend in recent decades. The GEP and the SVM are two algorithms with train and test base phases that are used to extract the hidden and complex relationships among dependent and independent variables. In this research work, in addition to the experimental assessment of different geometric and hydraulic parameters on discharge coefficient, the outputs of the two mentioned algorithms have been considered and compared with laboratory results.

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