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paratre, Confrence canadienne de gotechnique, Winnipeg, septembre 2003 To be published, Canadian Geotechnical Conference, Winnipeg, September 2003
 

Summary: À paraître, Conférence canadienne de géotechnique, Winnipeg, septembre 2003
To be published, Canadian Geotechnical Conference, Winnipeg, September 2003
WATER DIVERSION CAPACITY OF INCLINED CAPILLARY BARRIERS
Bruno Bussière, Industrial NSERC Polytechnique-UQAT Chair on Environment and Mine Waste
Management, UQAT, Rouyn-Noranda, Québec
Senami Aurore Apithy, Industrial NSERC Polytechnique-UQAT Chair on Environment and Mine Waste
Management, École Polytechnique, Montréal, Québec
Michel Aubertin, Industrial NSERC Polytechnique-UQAT Chair on Environment and Mine Waste
Management, École Polytechnique, Montréal, Québec
Robert P. Chapuis, CGM Department, École Polytechnique, Montréal, Québec
ABSTRACT
Covers with capillary barrier effects (CCBE) are an interesting alternative to low hydraulic conductivity covers to limit
water infiltration into waste disposal sites, especially for arid and semi-arid climates. This type of cover system typically
includes a fine-grained material layer overlying a coarser one. In sloping systems, water can be diverted at the interface
between the two materials, hence reducing water infiltration into the underlying wastes. However, at a certain down dip
location, the moisture-retaining layer can become wet enough to reduce the efficiency of the capillary barrier effect at the
interface. Infiltration of moisture into the coarse material then becomes possible as suction reaches its water entry value
(WEV). This paper presents the main results of a laboratory investigation and a numerical study designed to better
understand the diversion capacity of inclined CCBE. The results show that cover inclination, precipitation rate, and soil
properties and thickness are the main parameters influencing the diversion capacity of an inclined CCBE.

  

Source: Aubertin, Michel - Département des génies civil, géologique et des mines, École Polytechnique de Montréal

 

Collections: Engineering; Environmental Management and Restoration Technologies