...J.P. Giroud; J.G. Zornberg; J.F. Beech Liquid collection layers used in landfills often comprise two sections with different slopes. Typically, one of the slopes is much steeper than the other one. The steeper slope is generally the downstream slope in a landfill cover and the upstream slope...

... liner, Leachate collection layer, Liquid collection layer, Acceptance criterion, Laboratory test, Geotextile, Filter. AUTHORS: J.P. Giroud, Chairman Emeritus, and K.L. Soderman, Project Engineer, GeoSyntec Consultants, 621 N.W. 53rd Street, Suite 650, Boca Raton, Florida 33487, USA, Telephone: 1/561-995...

...J.P. Giroud; A. Zhao; R. Bonaparte Design engineers often assume that a geosynthetic liquid collection layer and a granular liquid collection layer having the same hydraulic transmissivity are equivalent. In the United States, such equivalency is often mandated by regulations for leachate...

...J.P. Giroud; A. Zhao The present paper provides equations for the design of liquid collection layers sloping radially toward a sump located in a corner of the liquid collection layer. It is pointed out that an equation currently used by some design engineers is not correct because it corresponds...

...J.P. Giroud; J.G. Zornberg; A. Zhao The present paper provides equations for the hydraulic design of liquid collection layers. A first series of equations gives the maximum thickness of the liquid collected in a liquid collection layer. These equations are used in design to check that the maximum...