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Question No. 1 Design the Sanitary Sewer for the plan above using the following: Population Density: 150 persons/ha Average Sewage Flow: 650 L/persons/day Peaking Factor (Harmon Formula) Infiltration Rate:
15(m^(3))/(h)(a)/()day Min. Diameter: 250 mm Sewer Wall thickness:
0.1\times sewer diameter Manning's
n=0.013Permissible full flow velocity: Minimum:
0.6(m)/(s)Maximum:
3.0(m)/(s)Minimum permissible depth of cover: 2.750 m Vertical alignment at the maintenance hole: Obvert of the outgoing pipe to the obvert of the lowest incoming pipe (except drop maintenance holes) Drop maintenance holes - the centre of the outgoing pipe is level with centre of the drop pipe. Road Elevations (m): \table[[MH No.,Elevation
(m)