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Secret soil cracks linger, despite surface sealing
Date:5/15/2012

ent used water from different sources, meaning the two samples had different stable isotope signatures, allowing researchers to distinguish between them.

At the time of the first irrigation event there were visible cracks upwards of three centimetres wide in the soil. By the time of the second irrigation, these cracks had visibly closed.

Despite this surface closure, the water from the second irrigation actually drained faster. It bypassed the sections of the soil where water from the first event was presumably stored and drained with signs of limited mixing, researchers said, meaning preferential flow paths must have remained open.

Greve's study was awarded best paper at a geoscience conference in Europe in 2011 and she recently presented her findings at a conference in Arizona.


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Contact: Myles Gough
myles.gough@unsw.edu.au
61-029-385-1933
University of New South Wales
Source:Eurekalert

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