RE: Measuring evapotranspiration on islands!

[Dr Tim Hess]

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Nicole,

If you are going to use weather data to estimate ET using the
Penman-Monteith approach (subject to all of Rick Allen's advice) you may be
interested to know of the AWSET software for use with automatic weather
stations. This will calculate ET for each timestep of the weather data using
resistance factors provided by the user (or standard factors for typical
surfaces). It follows the methods in FAO 56 that Rick recommended to you.

Information on AWSET can be found on
http://www.silsoe.cranfield.ac.uk/iwe/awset.htm

Bye the way, you will probably find that FAO 56 is out of print at the
moment. We have had great difficulty getting copies from FAO.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Dr Tim Hess
Institute of Water and Environment
Cranfield University
Silsoe
Bedford, MK45 4DT
UK
http://www.silsoe.cranfield.ac.uk/IWE/
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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> -----Original Message-----
> From: owner-sowacs@aqua.ccwr.ac.za 
> [mailto:owner-sowacs@aqua.ccwr.ac.za]
> Sent: 13 December 1999 18:21
> Subject: Measuring evapotranspiration on islands!
> 
> 
> 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
> 
> 
> SOWACS members,
> 
> My name is Nicole Armbrüster from the Department of 
> Plantecology of the
> University of Oldenburg (Germany). This year we started a project to
> estimate the evapotranspiration on two Eastfrisian Islands in 
> the North
> Sea.
> Now my question is, if somebody has any experiences in measuring
> evapotranspiration of dune vegetation on islands already?
> At the moment our plan is to solve this problem by using
> micrometeorological data and lysimeters (not weighable), with
> temperature-sensors and Theta-probes (FDR).
> Is it possible to use the Penman-Monteith-equation to estimate
> evapotranspiration of hilly areas or which other possibilities exist?
> Which experiences with FDR in the field do you have?
> 
> Thanks in advance,
> 
> ********************************
> 
> Nicole Armbrüster
> 
> Universität Oldenburg
> Fachbereich 7/ Pflanzenökologie
> Carl-von-Ossietzky Str. 9-11
> 26111 Oldenburg
> 
> Tel: 0441 / 771 79
> Fax: 0441 / 798-3331
> e-mail: nicole.armbruester@mail.uni-oldenburg.de
> 
> ********************************
> 
>