Re: Tensiometers: data variability vs TDR

[Jean-Paul Laurent]

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I think that PROFILING water-content, rather than always determining mean
values, is a challenge for the future of TDR. The Imko-Trime with the "Tube"
probe and the "Moisture Point" system from ESI are, as far as I know, the
only two commercial systems already available but there are still some
problems.

Impeadnce spectroscopy from TDR waveforms is also an interesting research
direction since it can provide information on the water-potential inside the
soil. On this topic, you can look at Max Hilhorst Phd thesis or at the
papers of T. Heimovaara.

References and manufacturers Web site adresses availale on the Sowacs
Web-site or on :

    http://www.lthe.hmg.inpg.fr/medite

Amicalement.
______________________________________________________

Jean-Paul Laurent, ChargÈ de recherches au CNRS
Laboratoire d'Ètude des Transferts en Hydrologie et Environnement.
(LTHE, UMR 5564 CNRS-INPG-UJF-IRD)
BP53, F-38041 Grenoble-Cedex 09, FRANCE
Tel. 33.4.76.82.50.59, Fax. 33.4.76.82.52.86
Page Web : http://www.lthe.hmg.inpg.fr/~laurent
______________________________________________________




> -----Message d'origine-----
> De: owner-sowacs@aqua.ccwr.ac.za [mailto:owner-sowacs@aqua.ccwr.ac.za]
> Date: mardi 11 avril 2000 21:24
> Objet: Time domain reflectometry areas of research.
>
>
> NOTE:  To get off this list, send email to majordomo@aqua.ccwr.ac.za
> with the body of the message containing the line:
> unsubscribe sowacs
>
> Dear Sowacsers,
>
> I have been reviewing the literature on TDR
> in an attempt to determine the most relevant problems in this area
> currently in need of solving, in the opinion of soil scientists
> and also in the opinion of TDR equipment manufacturers.
>
> I would greatly appreciate any opinion/insight anyone in this list wish
> to offer, regarding research needed in this area.
>
> I thank you all for taking time to read this request, and I will be
> grateful for your response.
>
> Elimoel Elias
> MSc Student (Soil Physics), BSc (Physics)
> CENA/USP
> Laboratorio de Fisica do Solo
> Caixa Postal 96, Piracicaba, SP
> 13400-970
> Brazil
> Tel/Fax: (55) (19) 434-0021
> e-mail: elielias@cena.usp.br
> Website:  http://www.freeyellow.com/members8/elimoel/elimoel.html
>
>