Answered: s an inlet time of 7 min. The…

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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Question

Determine the size of outfall sewer below Manhole 3 (MH3) needed to serve the drainage area in the following figure. Each area has an inlet time of 7 min. The coefficient of runoff for the 2 housing area 1 and 2 is 0.55 and area 3 is as asphalt pave area. The distance between manholes 1 and 2 is 300 meter and the pipe between manhole 2 and 3 is 500 meters. The velocity of water in pipes is 2.8 ft/sec. The rainfall intensity duration relationships is i=140/(t+16), where i=inch per hour and t=rain duration in minutes.

Area 1: 50000 m
MH & Inlet 1
Area 2= 2 htar
Area 3= 5 acres
MH & Inlet 3
MH & Inlet 2
Outfall

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