A contracted measurement weir is to be installed in a 22-ft-wide channel. The depth of the weir opening is 16 in, and the bottom of the weir opening is at elevation 479 ft. The bottom of the channel is at elevation 470 ft. For proper measurement and metering, a minimum of 6 in of hydraulic head over the weir lip is required. The average flow is 6 MGD but varies from a minimum of 3 MGD to a maximum of 12 MGD.

A contracted measurement weir is to be installed in a 22-ft-wide channel. The depth of the weir opening is 16 in, and the bottom of the weir opening is at elevation 479 ft. The bottom of the channel is at elevation 470 ft. For proper measurement and metering, a minimum of 6 in of hydraulic head over the weir lip is required. The average flow is 6 MGD but varies from a minimum of 3 MGD to a maximum of 12 MGD.

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

A contracted measurement weir is to be installed in a
22-ft-wide channel. The depth of the weir opening is
16 in, and the bottom of the weir opening is at elevation
479 ft. The bottom of the channel is at elevation 470 ft.
For proper measurement and metering, a minimum of
6 in of hydraulic head over the weir lip is required. The
average flow is 6 MGD but varies from a minimum of
3 MGD to a maximum of 12 MGD.
b=?
not to scale
22 ft
16 in
elev 479 ft
elev 470 ft
6.1. What should be the length of the weir opening?

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