Errors in Piezometric Measurement

by William W. Emmett,
James R. Wallace,

Serial Information: Journal of the Hydraulics Division, 1964, Vol. 90, Issue 6, Pg. 45-61

Document Type: Journal Paper

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Laboratory tests indicate that piezometric measurements of depth in open channels are characterized by positive errors that increase with size of piezometer opening. For a given piezometer size, the error is expressed as a constant percentage of the mean velocity head. Roughnesses added to the test channel tended to reduce the magnitude of the error whereas surface waves did not affect the piezometric measurement.

Subject Headings: Errors (statistics) | Surface waves | Wave measurement | Measuring instruments | Hydraulic roughness | Open channels | Head (fluid mechanics) | Laboratory tests

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