WIT Press


Removal By Pumping Of A LNAPL Lens Floating On The Phreatic Surface

Price

Free (open access)

Paper DOI

10.2495/OIL980181

Volume

27

Pages

10

Published

1998

Size

827 kb

Author(s)

M.I.J. van Dijke & S.E.A.T.M. van der Zee

Abstract

Removal of LNAPL lens from an aquifer is described using a multi-phase flow model. At the well boundary seepage face conditions are implemented. The effect of inclining the phreatic surface and the impact of oil entrapment on the removal rate is investigated by numerical simulations. The results lead to analytical approximations of the flow problem. 1 Introduction Spills of hydrocarbons have contaminated numerous aquifers. Non- aqeous phase liquids that are less dense than water, (LNAPL hence- forth called oil for brevity) such as gasoline, may accumulate as a lens at the phreatic water surface. In case of shallow lenses removal may be done by pumping into horizo

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