In: Civil Engineering
An existing 36-inch diameter concrete gravity sewer installed on a slope of 0.25% currently conveys a peak flow rate of 12 cfs. A builder proposes to connect a new residential development to this existing sewer. Projected peak flow from this new development is 4 cfs.
a) Depth of flow in sewer before new development is connected
b) Depth of flow in sewer after new development is connected
c) Flow velocity in sewer after new development is connected
d) Flow type (critical, subcritical or supercritical) after new development is connected
e) Diameter of a sewer to convey combined peak flow of 16 cfs if maximum allowable D/d is 0.85 (i.e. assume you are designing new sewer on the same 0.25% slope)