تأثیر شکل المقطع الطولی للسد الغاطس العریض على انسیابیة الجریان

doi:10.37650/ijce.2008.14162

	تأثیر شکل المقطع الطولی للسد الغاطس العریض على انسیابیة الجریان
Iraqi Journal of Civil Engineering
Article 9, Volume 5, Issue 12, 2008, Pages 80-97 PDF (150.46 K)
DOI: 10.37650/ijce.2008.14162
Abstract
One of the most important hydraulic structures which are used in irrigation systems are the broad crested weirs, which can be defined as a vertical barrier in a canal or tank side in which the water may flow freely. This weir can be used to measure the discharge and to raise the water level in the upstream. In this study the effect of longitudinal section on streamlined flow over broad crested weir has been investigated. Loss in energy, working efficiency and the coefficient of discharge have been considered. Experimental study carried out using (25) samples with six different hydraulic heads. The analysis of results indicate that the coefficient of discharge (Cd) increases with increasing Froud Number (Fr) and the most effective slope of upstream and downstream faces of the weir wear (45°) and (60°) respectively, at which the coefficient of discharge demonstrated was (0.644

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