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 5.1 Monthly Maintenance. Make sure the throat section is unobstructed and
clean. Remove algae growth.
5.2 Quarterly Maintenance. Clean the stilling well and make sure connecting
pipe is clear.
6. ACCURACY AND RELIABILITY. Accuracy of the Palmer-Bowlus flume is +3%;
this error coupled with the level measuring device error gives a combined
accuracy of approximately 10%. The reliability of flumes is not a
quantitative characteristic since it must be kept free of debris to function
correctly. Flumes are less accurate than a weir.
7-7
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