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
Depositing User: Pure Connector
Date Deposited: 30 May 2014 20:34
Last Modified: 21 Jul 2020 23:55
URI: https://ueaeprints.uea.ac.uk/id/eprint/48457
DOI: 10.1002/2014WR015273

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