Question: Water flow in a rectangular channel is to be metered by a thin-plate weir with side contractions, as in Table 10.2b, with L = 6

Water flow in a rectangular channel is to be metered by a thin-plate weir with side contractions, as in Table 10.2b, with L = 6 ft and Y = 1 ft. It is desired to measure flow rates between 1500 and 3000 gal/min with only a 6-in change in upstream water depth. What is the most appropriate length for the weir width b?

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