A mechanically cleaned bar screen is installed ahead of an aerated grit chamber in a wastewater treatment plant. The width of the screen channel is 0.86 m. At peak flow condition the flow upstream of the screen is 0.72 m3/s with a depth of 1.40 m. For a screen opening area of 0.84 m2, determine the head loss across the screen when the screen is 40% clogged, consider the discharge coefficient to be 0.6.
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