Publication detail

A Review of Measurement Calibration and Interpretation for Seepage Monitoring by Optical Fiber Distributed Temperature Sensors

GHAFOORI, Y. VIDMAR, A. ŘÍHA, J. KRYŽANOWSKI, A.

Original Title

A Review of Measurement Calibration and Interpretation for Seepage Monitoring by Optical Fiber Distributed Temperature Sensors

Type

journal article in Web of Science

Language

English

Original Abstract

Seepage flow through embankment dams and their sub-base is a crucial safety concern that can initiate internal erosion of the structure. The thermometric method of seepage monitoring employs the study of heat transfer characteristics in the soils, as the temperature distribution in earth-filled structures can be influenced by the presence of seepage. Thus, continuous temperature measurements can allow detection of seepage flows. With the recent advances in optical fiber temperature sensor technology, accurate and fast temperature measurements, with relatively high spatial resolution, have been made possible using optical fiber distributed temperature sensors (DTSs). As with any sensor system, to obtain a precise temperature, the DTS measurements need to be calibrated. DTS systems automatically calibrate the measurements using an internal thermometer and reference section. Additionally, manual calibration techniques have been developed which are discussed in this paper. The temperature data do not provide any direct information about the seepage, and this requires further processing and analysis. Several methods have been developed to interpret the temperature data for the localization of the seepage and in some cases to estimate the seepage quantity. An efficient DTS application in seepage monitoring strongly depends on the following factors: installation approach, calibration technique, along with temperature data interpretation and post-processing. This paper reviews the different techniques for calibration of DTS measurements as well as the methods of interpretation of the temperature data.

Keywords

optical fiber DTS; temperature; seepage; calibration; data interpretation

Authors

GHAFOORI, Y.; VIDMAR, A.; ŘÍHA, J.; KRYŽANOWSKI, A.

Released

6. 10. 2020

Publisher

MDPI

Location

4052 Basel, Switzerland

ISBN

1424-8220

Periodical

SENSORS

Year of study

20

Number

19

State

Swiss Confederation

Pages from

1

Pages to

23

Pages count

23

URL

https://www.mdpi.com/1424-8220/20/19/5696

Full text in the Digital Library

http://hdl.handle.net/11012/195720

BibTex

@article{BUT165993,
  author="Yaser {Ghafoori} and Andrej {Vidmar} and Jaromír {Říha} and Andrej {Kryžanowski}",
  title="A Review of Measurement Calibration and Interpretation for Seepage Monitoring by Optical Fiber Distributed Temperature Sensors",
  journal="SENSORS",
  year="2020",
  volume="20",
  number="19",
  pages="1--23",
  doi="10.3390/s20195696",
  issn="1424-8220",
  url="https://www.mdpi.com/1424-8220/20/19/5696"
}