�From:�	Arne Kure (kure)
�To:�		sowacs@aqua.ccwr.ac.za
�Date:�	Tuesday, June 4, 1996  2:24 pm
�Subject:�	Sensor positioning with trickle (fwd)

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From Allenric@cc.usu.edu Fri May 31 17:58:59 1996
Date: Fri, 31 May 1996 09:57:18 -0600 (MDT)
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From: Allenric@cc.usu.edu (Dr. Richard G. Allen)
Subject: Sensor positioning with trickle
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Dear Group:

I agree with Jochen Eberhard's comments concerning sensorplacement for
trickle.  The group may be interested in a recent Ph.D. thesiscompleted
this spring at Utah State University in the Plant, Soils andBiometeorology
Department under the tutorage of Dr. Dani Or.  The study utilizeda grid of
TDR and tensiometer sensors placed within the soil profile underboth
surface and drip emitters.  The grid was used to monitor soilwater change
and soil potential change with time under various drip irrigation
frequencies.  One of the outcomes of the study was theidentification of the
"optimal" locations of various types and forms of soil watersensors in
order to best monitor the full range in soil water change duringirrigation
and during subsequent soil water extraction by roots.

The dissertation, by student Eugenio Coelho,  was written in theform of
four paper manuscripts that have been or will be submitted torefereed
journals.  For a preview look at some of the approach (TDR gridphotos etc.)
and results, you can access Dani Or's home page on the Web at:

http://tal.agsci.usu.edu/home/dani/web/

Also, Dani or Eugenio  may be willing to mail some portions of the
manuscripts to individuals who can not wait until the publication(I'm
speaking for Dani since he is in Israel for the new few weeks.  Iassume
that he can accomodate some requests).  His Email address is onhis home page.

Best Regards,

Rick Allen

Dr. Richard G. Allen
Associate Professor
Dept. Biological and Irrigation Engineering
Utah State University
Logan, UT 84322-4105
tele:1 801 797-2798
fax: 1 801 797-1248
Email:  ALLENRIC@CC.USU.EDU