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Title: Modelling flow to leachate wells in landfills

Vertical wells are frequently used as a means of controlling leachate levels in landfills. They are often the only available dewatering option for both old landfills without any basal leachate collection layer and for newer sites where the installed drainage infrastructure has failed. When the well is pumped, a seepage face develops at the entry into the well so that the drawdown in the surrounding waste will not be as great as might be expected. The numerical groundwater flow model MODFLOW-SURFACT, which contains the functionality to model seepage surfaces, has been used to investigate the transient dewatering of a landfill. The study concludes that the position of the seepage face and information about the characteristics of the induced seepage flow field are important and should not be neglected when designing wells in landfills.
Authors:
; ;
Publication Date:
OSTI Identifier:
20875632
Resource Type:
Journal Article
Resource Relation:
Journal Name: Waste Management; Journal Volume: 24; Journal Issue: 3; Other Information: DOI: 10.1016/j.wasman.2003.11.010; PII: S0956053X03002307; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; DRAINAGE; DRAWDOWN; FLOW MODELS; GROUND WATER; SANITARY LANDFILLS; WASTES; WATER POLLUTION; WATER POLLUTION CONTROL; WATER REMOVAL; WELLS