Active-distributed temperature sensing to continuously quantify vertical flow in boreholes

Read, T., Bour, O., Selker, J. S., Bense, V. F., Le Borgne, T., Hochreutener, R. and Lavenant, N. (2014) Active-distributed temperature sensing to continuously quantify vertical flow in boreholes. Water Resources Research, 50 (5). 3706–3713. ISSN 0043-1397

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Abstract

We show how a distributed borehole flowmeter can be created from armored Fiber Optic cables with the Active-Distributed Temperature Sensing (A-DTS) method. The principle is that in a flowing fluid, the difference in temperature between a heated and unheated cable is a function of the fluid velocity. We outline the physical basis of the methodology and report on the deployment of a prototype A-DTS flowmeter in a fractured rock aquifer. With this design, an increase in flow velocity from 0.01 to 0.3 m s−1 elicited a 2.5°C cooling effect. It is envisaged that with further development this method will have applications where point measurements of borehole vertical flow do not fully capture combined spatiotemporal dynamics.

Item Type:	Article
Uncontrolled Keywords:	a-dts,borehole,flowmeter,heated,fiber optics
Faculty \ School:	Faculty of Science Faculty of Science > School of Environmental Sciences
UEA Research Groups:	Faculty of Science > Research Groups > Geosciences Faculty of Social Sciences > Research Centres > Water Security Research Centre Faculty of Science > Research Groups > Geosciences and Natural Hazards (former - to 2017)
Depositing User:	Pure Connector
Date Deposited:	30 May 2014 20:34
Last Modified:	24 Oct 2022 06:17
URI:	https://ueaeprints.uea.ac.uk/id/eprint/48457
DOI:	10.1002/2014WR015273

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