Mapping variability of soil water content and flux across 1¿1000 m scales using the actively heated fiber optic method

Sayde, C. and Benitez Buelga, Javier and Rodríguez Sinobas, Leonor and Khoury, Laureine El and English, M. and Giesen, Nick Van de and Selker, J. (2014). Mapping variability of soil water content and flux across 1¿1000 m scales using the actively heated fiber optic method. "Water Resources Research", v. 50 (n. 9); pp. 7302-7317. ISSN 1944-7973. https://doi.org/10.1002/2013WR014983.

Description

Title: Mapping variability of soil water content and flux across 1¿1000 m scales using the actively heated fiber optic method
Author/s:
  • Sayde, C.
  • Benitez Buelga, Javier
  • Rodríguez Sinobas, Leonor
  • Khoury, Laureine El
  • English, M.
  • Giesen, Nick Van de
  • Selker, J.
Item Type: Article
Título de Revista/Publicación: Water Resources Research
Date: September 2014
ISSN: 1944-7973
Volume: 50
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Ingeniería Rural [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The Actively Heated Fiber Optic (AHFO) method is shown to be capable of measuring soil water content several times per hour at 0.25 m spacing along cables of multiple kilometers in length. AHFO is based on distributed temperature sensing (DTS) observation of the heating and cooling of a buried fiber-optic cable resulting from an electrical impulse of energy delivered from the steel cable jacket. The results presented were collected from 750 m of cable buried in three 240 m colocated transects at 30, 60, and 90 cm depths in an agricultural field under center pivot irrigation. The calibration curve relating soil water content to the thermal response of the soil to a heat pulse of 10 W m−1 for 1 min duration was developed in the lab. This calibration was found applicable to the 30 and 60 cm depth cables, while the 90 cm depth cable illustrated the challenges presented by soil heterogeneity for this technique. This method was used to map with high resolution the variability of soil water content and fluxes induced by the nonuniformity of water application at the surface.

Funding Projects

TypeCodeAcronymLeaderTitle
Unspecified1129003UnspecifiedNational Science FoundationUnspecified

More information

Item ID: 36214
DC Identifier: http://oa.upm.es/36214/
OAI Identifier: oai:oa.upm.es:36214
DOI: 10.1002/2013WR014983
Official URL: http://onlinelibrary.wiley.com/doi/10.1002/2013WR014983/full
Deposited by: Memoria Investigacion
Deposited on: 25 Jun 2015 13:43
Last Modified: 11 Jun 2019 08:41
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