Heated fiber optic distributed temperature sensing for measuring soil volumetric heat capacity and water content: A dual probe heat-pulse approach

Benitez Buelga, Javier; Sayde, C.; Rodríguez Sinobas, Leonor y Selker, J. (2014). Heated fiber optic distributed temperature sensing for measuring soil volumetric heat capacity and water content: A dual probe heat-pulse approach. "Vadose Zone Journal", v. 13 (n. 11); pp. 13-20. ISSN 1539-1663. https://doi.org/10.2136/vzj2014.02.0014.

Descripción

Título: Heated fiber optic distributed temperature sensing for measuring soil volumetric heat capacity and water content: A dual probe heat-pulse approach
Autor/es:
  • Benitez Buelga, Javier
  • Sayde, C.
  • Rodríguez Sinobas, Leonor
  • Selker, J.
Tipo de Documento: Artículo
Título de Revista/Publicación: Vadose Zone Journal
Fecha: Noviembre 2014
Volumen: 13
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Ingeniería Rural [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

Texto completo

[img]
Vista Previa
PDF (Document Portable Format) - Se necesita un visor de ficheros PDF, como GSview, Xpdf o Adobe Acrobat Reader
Descargar (1MB) | Vista Previa

Resumen

The first feasibility study of using dual-probe heated fiber optics with distributed temperature sensing to measure soil volumetric heat capacity and soil water content is presented. Although results using different combinations of cables demonstrate feasibility, further work is needed to gain accuracy, including a model to account for the finite dimension and the thermal influence of the probes. Implementation of the dual-probe heat-pulse (DPHP) approach for measurement of volumetric heat capacity (C) and water content (θ) with distributed temperature sensing heated fiber optic (FO) systems presents an unprecedented opportunity for environmental monitoring (e.g., simultaneous measurement at thousands of points). We applied uniform heat pulses along a FO cable and monitored the thermal response at adjacent cables. We tested the DPHP method in the laboratory using multiple FO cables at a range of spacings. The amplitude and phase shift in the heat signal with distance was found to be a function of the soil volumetric heat capacity. Estimations of C at a range of moisture contents (θ = 0.09– 0.34 m3 m−3) suggest the feasibility of measurement via responsiveness to the changes in θ, although we observed error with decreasing soil water contents (up to 26% at θ = 0.09 m3 m−3). Optimization will require further models to account for the finite radius and thermal influence of the FO cables. Although the results indicate that the method shows great promise, further study is needed to quantify the effects of soil type, cable spacing, and jacket configurations on accuracy.

Más información

ID de Registro: 36212
Identificador DC: http://oa.upm.es/36212/
Identificador OAI: oai:oa.upm.es:36212
Identificador DOI: 10.2136/vzj2014.02.0014
URL Oficial: https://www.soils.org/publications/vzj/abstracts/13/11/vzj2014.02.0014?search-result=1
Depositado por: Memoria Investigacion
Depositado el: 26 Jun 2015 15:14
Ultima Modificación: 26 Jun 2015 15:14
  • Open Access
  • Open Access
  • Sherpa-Romeo
    Compruebe si la revista anglosajona en la que ha publicado un artículo permite también su publicación en abierto.
  • Dulcinea
    Compruebe si la revista española en la que ha publicado un artículo permite también su publicación en abierto.
  • Recolecta
  • e-ciencia
  • Observatorio I+D+i UPM
  • OpenCourseWare UPM