Use of DFOT Heat Pulse Method ForWetting Pattern Determination in Drip Irrigation Emitters

Gil Rodríguez, María and Rodríguez Sinobas, Leonor and Benitez Buelga, Javier and Sánchez Calvo, Raúl and Juana Sirgado, Luis and Castañon Lion, Guillermo and Laguna Peñuelas, Francisco (2011). Use of DFOT Heat Pulse Method ForWetting Pattern Determination in Drip Irrigation Emitters. In: "8th EGU General Assembly, EGU 2011", 04/04/2011 - 06/07/2012, Viena, Austria. pp..

Description

Title: Use of DFOT Heat Pulse Method ForWetting Pattern Determination in Drip Irrigation Emitters
Author/s:
  • Gil Rodríguez, María
  • Rodríguez Sinobas, Leonor
  • Benitez Buelga, Javier
  • Sánchez Calvo, Raúl
  • Juana Sirgado, Luis
  • Castañon Lion, Guillermo
  • Laguna Peñuelas, Francisco
Item Type: Presentation at Congress or Conference (Other)
Event Title: 8th EGU General Assembly, EGU 2011
Event Dates: 04/04/2011 - 06/07/2012
Event Location: Viena, Austria
Title of Book: Geophysical Research Abstracts of 8th EGU General Assembly
Date: 2011
Volume: 13
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

Although there are numerous accurate measuring methods to determine soil moisture content in a spot, until very recently there were no precise in situ and in real time methods that were able to measure soil moisture content along a line. By means of the Distributed Fiber Optic Temperature Measurement method or DFOT, the temperature in 0.12 m intervals and long distances (up to 10,000 m) with a high time frequency and an accuracy of +0.2º C is determined. The principle of temperature measurement along a fiber optic cable is based on the thermal sensitivity of the relative intensities of backscattered photons that arise from collisions with electrons in the core of the glass fiber. A laser pulse, generated by the DTS unit, traversing a fiber optic cable will result in backscatter at two frequencies. The DTS quantifies the intensity of these backscattered photons and elapsed time between the pulse and the observed returned light. The intensity of one of the frequencies is strongly dependent on the temperature at the point where the scattering process occurred. The computed temperature is attributed to the position along the cable from which the light was reflected, computed from the time of travel for the light.

More information

Item ID: 13165
DC Identifier: http://oa.upm.es/13165/
OAI Identifier: oai:oa.upm.es:13165
Official URL: http://meetingorganizer.copernicus.org/EGU2011/EGU2011-13158.pdf
Deposited by: Memoria Investigacion
Deposited on: 30 Oct 2012 12:06
Last Modified: 21 Apr 2016 12:28
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