CIV E 530 - OPEN-CHANNEL HYDRAULICS FALL 2011 HOMEWORK No. 5 Use ONLINE CHANNEL 01 to calculate normal depth, velocity, and Froude number for the following cases: Q = 150 m3/s, b = 10 m, z = 2, So = 0.0005, n = 0.025 Q = 250 cfs, b = 20 ft, z = 1, So = 0.001, n = 0.030 Q = 350 m3/s, b = 25 m, z = 1, So = 0.0008, n = 0.035 Q = 450 cfs, b = 15 ft, z = 3, So = 0.005, n = 0.035 A recent flood on Clearwater Creek has left observable water marks on a certain river reach. To estimate the flood magnitude, hydraulic data has been measured at two cross sections A and B, a distance of 2,550 ft apart. The reach fall between the cross sections is 12.1 ft and the average Manning's n is 0.04. The upstream flow area, wetted perimeter, and α coefficient are 600 ft2, 55 ft, and 1.17; the downstream flow area, wetted perimeter, and α coefficient are 720 ft2, 52 ft, and 1.12. Use SLOPE AREA to calculate the flood discharge. Calculate the unit-width discharge in an overland flow plane, under laminar flow, with mean depth of 3.5 cm and slope of 0.0012. Assume water temperature T = 20 oC. Report discharge in L/s/m.