Re: tensiometer problem ?

[Martin Parkes]

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Hello Philippe

>During those events, the depression measured by the tensiometer was
positive !
>Does anybody encount the same problem ??

We do indeed, since tensiometers are recording both matric and pneumatic
potential...
What I've read suggests that entrapped air can persist for periods of up to
10 days, following heavy rainfall events. Though reported  entrapped air
pressures, recorded during border strip irrigation, tended to dissipate
within about 7 hours. Field measurements suggest that entrapped air
pressures are typically up to a maximum of 20 cm water.

What did you measure?

best regards

Martin Parkes
WasteTrim at Technology Transfer Centre, Alrick Building,
Mayfield Road, Edinburgh EH9 3JL, SCOTLAND 
tel (44) 131 472 4708
fax (44) 131 662 4678