By Jones, Garr M.(eds.)
With the addition of four Interactive Tables and 178 Digitized Graphs the 3rd variation of Pumping Station layout maintains the award-winning culture of past releases of this product. Written via forty four authors with professional enter from 141 different members for brands, application managers, layout engineers environmental engineers and all fascinated by the layout of pumping stations, this e-book offers professional details. realizing is given to some of the disciplines vital to the layout and execution of trustworthy, effortless to function, low upkeep pumping stations. The intensity of expertise and services of the participants and editors is remarkable making this booklet the traditional advisor for the implementation of a well-integrated pumping station layout.
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Extra info for Pumping Station Design
Customary units. The Manning equation can be used for pipes flowing full, but has no advantage over the Hazen–Williams equation. For pipes flowing full and under pressure, the relationship between C and n is n = 1:12 D0:037 CS 0:04 (3-18a) in SI units where D is the ID in meters. S. customary units, the equation is n = 1:07 D0:037 CS 0:04 pipes. In extensive studies, Yarnell and Woodward  confirmed the exponents of 2⁄3 and 1⁄2 , respectively, for R and S in Equation 3-17 for full pipes and also proved that the apparent values of n vary considerably with depth of flow.
Hence, there is a critical depth, yc , at which specific energy is minimum. To find it, replace v2 with (Q=A)2 , differentiate Equation 3-4 with respect to y, and set the resulting expression equal to zero; thus, dEs Q2 dA =1 þ À2AÀ3 =0 dy 2g dy For a prismatic channel of any shape, as in Figure 3-5b, dA = bdy. Substituting bdy for dA, canceling dy/dy, and collecting terms yields Q2 A3 = g b (3-22) 3-7. 17 a Depth v2/2g y dA = bdy dy Es y y Tranquil flow Shooting flow yc o b E a b Figure 3-5.
Arredi diagram. In the lower half of the figure, plot (to the same scale) depth, d, versus area for the channel (curve OB) and plot depth versus throat area referred to the channel invert (curve CD). Note that OC is the height of the step, s, so throat depth is d À s = yc . Consider point e in Figure 3-7.