Re: tensiometer problem ? REPLY IN CAPS

[owner-sowacs@aqua.ccwr.ac.za]

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Yeh Ive seen something similar in flooded sugarcane where tensiometers
connected to a presure transducer show positve readings during flooding
events. The results tend to be only slightly positive and are a direct
result of the posite head or the amount of water pushing down on the
tensiometer tip.

----- Original Message -----
> >  Dear subscribers to SoWaCs,
> >
> >
> >I'm working on Wetland hydrology in the Seine valley (France). To
> >investigate unsaturated zone
> >I used SDEC tensiometers and the SDEC portable electronic readout unit.
> >I've done two years of measurements and it worked very good except during
> >flood events (site was
> >covered by a 30cm thick watershed sometimes during the study period).
> >During those events, the depression measured by the tensiometer was
positive !
> >Does anybody encount the same problem ??
> >
> NO PROBLEM.  LOOKS LIKE YOU MEASURED A POSITIVE HEAD DURING SATURATED
> CONDITIONS.
>
> =======================================
> Gary Hart
> Department of Soil Science
> UW-Madison
> 1525 Observatory Drive
> Madison,  WI  53706-1299
> 608-262-0415
> Fax: 608-265-2595
> =======================================
>
>
>