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Limitations of fibre optic distributed temperature sensing for quantifying surface water groundwater interactions


Authors: Roshan, H.
Owners: CTEMPs OSU-UNR
Resource type:Composite Resource
Created:Mar 31, 2018 at 11:55 p.m.
Last updated: Apr 09, 2018 at 7:13 p.m. by CTEMPs OSU-UNR

Abstract

Studies of surface water–groundwater interactions using fiber optic distributed temperature sensing (FO-DTS) has increased in recent years. However, only a few studies to date have explored the limitations of FO-DTS in detecting groundwater discharge to 5 streams. A FO_DTS system was therefore tested in a flume under controlled laboratory conditions for its ability to accurately measure the discharge of hot or cold groundwater into a simulated surface water flow. In the experiment the surface water (SW) and groundwater (GW) velocities, expressed as ratios (vgw/vsw), were varied from 0.21 % to 61.7 %; temperature difference between SW-GW were varied from 2 to 10 ◦C; the 10 direction of temperature gradient were varied with both cold and-hot water injection; and two different bed materials were used to investigate their effects on FO_DTS’s detection limit of groundwater discharge. The ability of the FO_DTS system to detect the discharge of groundwater of a different temperature in the laboratory environment was found to be mainly dependent upon the surface and groundwater flow velocities and 15 their temperature difference. A correlation was proposed to estimate the groundwater discharge from temperature. The correlation is valid when the ratio of the apparent temperature response to the source temperature difference is above 0.02

Raw project data is available by contacting ctemps@unr.edu

Subject Keywords

DTS,fiber optic,surface water - groundwater,CTEMPs

How to cite

Roshan, H. (2018). Limitations of fibre optic distributed temperature sensing for quantifying surface water groundwater interactions, HydroShare, http://www.hydroshare.org/resource/a11a6bc7fc694aea849dff40f833dbf2

This resource is shared under the Creative Commons Attribution CC BY.

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Name Organization Address Phone Author Identifiers
Roshan, H.

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