Experimental Study of the Effect of Trapezoidal Labyrinth Weir Geometry on Increasing Dissolved Oxygen

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MANSOURI REIHANEH; ESMAEILI VARAKI MAHDI; NAVABIAN MARYAM

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Journal: Iranian Journal of Soil and Water Research Year:2018 | Volume:49 | Issue:5 Page(s): 977-990

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Information Journal Paper

Title

Experimental Study of the Effect of Trapezoidal Labyrinth Weir Geometry on Increasing Dissolved Oxygen

Author(s)

MANSOURI REIHANEH | ESMAEILI VARAKI MAHDI | NAVABIAN MARYAM | Issue Writer Certificate

Keywords

Dissolved OxygenQ2

Labyrinth weirQ1

Water qualityQ1

Tail water depthQ1

Height dropQ1

Abstract

The amount of Dissolved Oxygen (DO) in water is an important parameter of rivers Water quality. Installation of weirs in channels is one of the methods entering air babbles into the falling water and increase DO. In this research, the performance of trapezoidal Labyrinth weirs was investigated as compared with the linear weirs under various geometries and hydraulic conditions in terms of DO Experimental observations and result analysis showed that the length of cycle in the flow direction, thickness of weirs and nappe patterns are three effective parameters on DO amount in trapezoidal Labyrinth weirs. The results of this study indicated that the three cycles-Labyrinth weirs had better performance compared to two cycles-Labyrinth weirs. Also, the results showed that the three cycles-trapezoidal Labyrinth weirs with the lower length in the flow direction at low relative head and with the longer length in the flow direction at high relative head had the best performance in terms of DO that increased 58 and 44 percent, respectively. The results of this study indicated that, by increasing the ratio of falling height to weir height (ℎ 𝑑 /𝑃 ) from 0. 4 to 0. 8, the DO efficiency increases (13%) by Labyrinth weirs.

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APA: Copy

MANSOURI, REIHANEH, ESMAEILI VARAKI, MAHDI, & NAVABIAN, MARYAM. (2018). Experimental Study of the Effect of Trapezoidal Labyrinth Weir Geometry on Increasing Dissolved Oxygen. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 49(5 ), 977-990. SID. https://sid.ir/paper/225436/en

Vancouver: Copy

MANSOURI REIHANEH, ESMAEILI VARAKI MAHDI, NAVABIAN MARYAM. Experimental Study of the Effect of Trapezoidal Labyrinth Weir Geometry on Increasing Dissolved Oxygen. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2018;49(5 ):977-990. Available from: https://sid.ir/paper/225436/en

IEEE: Copy

REIHANEH MANSOURI, MAHDI ESMAEILI VARAKI, and MARYAM NAVABIAN, “Experimental Study of the Effect of Trapezoidal Labyrinth Weir Geometry on Increasing Dissolved Oxygen,” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 49, no. 5 , pp. 977–990, 2018, [Online]. Available: https://sid.ir/paper/225436/en

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