Source of Error in Water Velocity Measurement for Aquatic Studies

Autor:	R. K. Sweeney, S. E. Barbour, D. L. Morantz
Rok vydání:	1986
Předmět:	Observer (quantum physics) Acoustics Component (UML) Metre Aquatic Science Water velocity Underwater Ecology Evolution Behavior and Systematics Geology
Zdroj:	Canadian Journal of Fisheries and Aquatic Sciences. 43:893-896
ISSN:	1205-7533 0706-652X
DOI:	10.1139/f86-111
Popis:	Water velocity is an important component in aquatic studies but is subject to alteration by the presence of an underwater observer. Tests using two types of water velocity meter and a snorkeler showed the effects to be a function of the diver's distance from the probe. Lateral positions generally caused an acceleration of flow at the measurement point of up to 150%, while downstream positions resulted in a decrease in flow of up to 65%. It is recommended that where underwater observers are employed, they position instruments that can be read remotely and then move well away from the point of measurement.
Databáze:	OpenAIRE
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