International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 404
s a device universally used for meas-uring the discharge of water. It is a rectangular orificethrough which the water flows. 1019. In Fig. 182 is rep-resented a weir in which thetop of the weir (orifice) islevel with the upper surfaceof the water flowing throughit. By means of higher math-ematics… … HYDROMECHANICS. 393 theoretical discharge is Q — dxbx ^^„= db X ||/2^/j =f b d^ Zgd, the head for this case being taken as d. The actual discharge is(?„=.G15(2=.G15 x^bdx^Zgd = Alb\/^Zgd\ (42.) That is, the actual discharge through a zveir in cubic feetper second whose top is on a level with the…
Railroad engineering
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