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Geophysics: What is it?

The widely used definition of geophysics is that provided by Sheriff in the Encyclopedia of Exploration Geophysics. For the purposes of this site, we refer more specifically to the following definitions – these focus on Environmental and Engineering Geophysics: Geophysics is: The subsurface site characterization of the geology, geological structure, groundwater, contamination, and human artifacts beneath […]

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Geosynthetic Materials: Use of Pozidrain in Landfill Capping

We occasionally post capping design information on this blog. We hope that you will find these posts interesting. To guarantee a landfill cap which will drain adequately and for effective gas collection, the landfill cap should incorporate a drainage layer above and preferably also, a gas collection layer below the cap’s low permeability lining system. The geosyntheic […]

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Landfill CQA Questions: Triaxial Compression Testing or Direct Shear Testing?

A question for landfill construction quality assurance engineers which arises regularly is whether they should use Triaxial Compression Testing or Direct Shear Testing. Well although triaxial compression testing is the most frequently used small scale direct shear testing does have certain advanatges and can be appropriate under certian circumstances.   There is an interesting dicussion of this issue at […]

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Training Skills for Work in Landfill CQA

We have been asked where the necessary skills can be obtained for Landfill Construction Quality Assurance work. The core skill needed for Landfill CQA is an good appreciation of soils mechanics, as most of the CQA work relates to civil engineering earthworks, so a good grounding comes from the Soils Mechanics tought within any practically based Civil […]

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Waste Strategy 2007 And Landfill Construction Safety Assurance

The Waste Strategy 2007 has been published, and yes, of course, poor old landfill gets the “worst” (least preferred option) ranking in the waste heirarchy again! Seriously though, there was never going to be any change to the requirements for landfills including the Construction Quality Assurance requirements for landfills, but we thought we would post […]

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