Infoscience

Journal article

Scaling unstable infiltration in the vadose zone

This technical note examines the feasibility of physically modelling unstable water flow in the form of fingers in the vadose zone. A scaling analysis is performed based on published expressions for the width and velocity of fingers, as well as the distance between fingers. Particular reference is given to the use of a geotechnical centrifuge as an experimental apparatus for modelling this phenomenon. Initial results are presented for 1g and 10g fingers from a preliminary experimental program undertaken to explore the analysis. These results agree with the scaling analysis presented and indicate that finger scaling using centrifugal modelling techniques is possible.

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