A 100m sewer reach is to have a minimum flow capacity of 200 L/s. The street elevation at the upper MH is 305.55 m and at the lower MH it is 303.05 m. Select an appropriate pipe diameter and slope for this reach and determine the pipe invert elevations at each MH. Use a cover depth of 2.00 m above the pipe crown

Subject water system design

Design a concrete sewer required to carry a maximum design discharge of 10 cfs on a slope of 0.003. The minimum expected discharge is 2.5 cfs. Check the velocity for self-cleansing. Assume that commercial pipes are available in steps increasing by 0.5 ft (i.e. davail = 1 ft, 1.5 ft, 2ft, 2.5 ft...etc.)

2. A sewer line is to be designed to accommodate minimum and maximum flows of 30 m³/d and 1730 m³/d, respectively, with a self-cleansing shear stress of 1 Pa. The minimum allowable sewer diameter is 200 mm, and the ASCE design aids give Manning's n values of 0.0093, 0.0107, and 0.0121 for Extra Care, Typical, and Substandard conditions, respectively; and a minimum-self-cleansing slope formula of 0.00711Q5 -0.5724 where Qmin is in liters per second. (a) Verify the adequacy of the minimum-self-cleansing slope formula and assess the adequacy of using the minimum allowable pipe diameter and the minimum-self-cleansing slope to meet the minimum and maximum-flow conditions. (b) What is the maximum flow that the sewer segment can safely accommodate. " min