13.24 The sewage discharges from two neighborhoods A and B have to be disposed of through an existing trunk sewer at MH 100 (see Fig. 13.18). The average sewage flow from the two neighborhoods is 250 Lpcd, and the peaking factor for both areas is 3.0. Neighborhood A has 4,300 dwelling units with six persons per unit (n for all sewers is 0.013). If the sewage level is 626.50 m during peak flow in the existing trunk at MH 100, determine the following: (a) The maximum number of dwelling units that can be served from neighborhood B (b) The size and slope of lines A and B if the velocity at peak flow is not to be less than 1 m/s (c) The velocities and depths of flow in lines A and B at average flow condition.

13.24 The sewage discharges from two neighborhoods A and B have to be disposed of through an existing trunk sewer at MH 100 (see Fig. 13.18). The average sewage flow from the two neighborhoods is 250 Lpcd, and the peaking factor for both areas is 3.0. Neighborhood A has 4,300 dwelling units with six persons per unit (n for all sewers is 0.013). If the sewage level is 626.50 m during peak flow in the existing trunk at MH 100, determine the following: (a) The maximum number of dwelling units that can be served from neighborhood B (b) The size and slope of lines A and B if the velocity at peak flow is not to be less than 1 m/s (c) The velocities and depths of flow in lines A and B at average flow condition.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Storm Sewers and Detention

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Question

13.24 The sewage discharges from two neighborhoods A and
B have to be disposed of through an existing trunk sewer at MH
100 (see Fig. 13.18). The average sewage flow from the two
neighborhoods is 250 Lpcd, and the peaking factor for both
areas is 3.0. Neighborhood A has 4,300 dwelling units with six
persons per unit (n for all sewers is 0.013).
If the sewage level is 626.50 m during peak flow in the existing
trunk at MH 100, determine the following:
(a) The maximum number of dwelling units that can be
served from neighborhood B
(b) The size and slope of lines A and B if the velocity at
peak flow is not to be less than 1 m/s
(c) The velocities and depths of flow in lines A and B at
average flow condition.
From neighborhood A
Line A
100 m
d = 800 mm
MH 100 d 800 mm
MH 101
Trunk sewer
Trunk invert
elevation
626.00 m
625.70 m
Trunk invert
Line B
elevation
From neighborhood B

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