Question 1: In a wastewater treatment plant, a coarse screen was used. After 30 minutes of operation the 25% screen area is clogged. The velocity through the clogged screen was calculated as 1.2 m/s. The headloss for the clogged screen was determined to be 0.1 m. Assume the headloss coefficient for the clogged bar is 0.6. What would be head loss for the clean screen? Assume the headloss coefficient for the clean bar is 0.7. 1 V2-2 Head loss through a bar screen, h = C 2g