...N. Touze There seems to be no consensus about whether the world is currently going through an unpreceded crisis. The conditions of life have greatly improved since the 17th century in terms of food quality and quantity, water quality, life expectancy, poverty, violence, environment, freedom, social...

...J. Mitchell-Blackwood; P. L. Gurian; A. Kumar; M. Sarich Polypropylene fibers present favorable physical, hydraulic and specific surface area properties for use as a raw material or substrate in developing a novel iron-oxide-coated medium for the adsorption of heavy metals from drinking water...

... thus formed is typically used to contain a liquid, such as water or leachate. If there is a defect in the upper geomembrane, some of the liquid initially contained above the upper geomembrane migrates into the bentonite. Similarly, if there is a defect in the lower geomembrane, some of the liquid...

... and are overlain by a welded geomembrane. Water can migrate from the underlying soil into the bentonite of the overlaps, flow in the bentonite, and migrate laterally in the bentonite between the two geomembranes. Water is driven from the soil to the bentonite by a head difference that results in great part from...

..., the hydraulic conductivities of the two layers, the length of the drainage system, and the slope. Design examples are presented. 24 06 2001 29 01 2004 01 02 2004 © 2004 Thomas Telford Ltd 2004 Geosynthetics Geocomposite Geonet Flow Liquid Water Leachate Two layers Drainage...