A review of measurement calibration and interpretation for seepage monitoring by optical fiber distributed temperature sensors

Ghafoori, Yaser (avtor), Vidmar, Andrej (avtor), Říha, Jaromir (avtor), Kryžanowski, Andrej (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: hydrotechnics, optical fiber DTS, temperature, seepage, calibration, data interpretation
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.02 - Pregledni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2020
• Št. strani: 23 str.
• Številčenje: Vol. 20, iss. 19, art. 5696
• PID: 20.500.12556/RUL-125103
• UDK: 626/627
• ISSN pri članku: 1424-8220
• DOI: 10.3390/s20195696
• COBISS.SI-ID: 51392771
• Datum objave v RUL: 04.03.2021

Gradivo je del revije

• Naslov: Sensors
• Skrajšan naslov: Sensors
• Založnik: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 06.10.2020

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: hidrotehnika, DTS, temperatura, precejanje, kalibracija

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0180
• Naslov: Vodarstvo in geotehnika: orodja in metode za analize in simulacije procesov ter razvoj tehnologij

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: Czech Republic
• Številka projekta: FAST-S-19-5714
• Naslov: Probability assessment of internal instability in earth structures and in hydraulic structures