Aggregate resources in the Netherlands

We have built a 3D lithological model of the Netherlands, for the purpose of mapping on-land aggregate resources down to 50 m below the surface. The model consists of voxel cells (1000 · 1000 · 1 m), with lithological composition and aggregate content estimates as primary attributes. These attributes were derived from ∼350,000 borehole...

The sand extraction potential of embedded land surface lowering in the Netherlands

In the Netherlands, mineral extraction by means of dredging or quarrying meets with considerable societal resistance. Land surface lowering prior to large land reconstruction projects may raise fewer objections. We have calculated the potential yields of sand and gravel from land surface lowering embedded in planned building and construction...

Construction raw materials policy and supply practices in Northwestern Europe

The present contribution is an inventory of the construction raw materials policy and supply practices in The Netherlands, Belgium, North Rhine-Westphalia, Lower Saxony, Great Britain, Norway and Denmark. The work has been commissioned by the Dutch government in order to benchmark its domestic provision and the governing mineral planning policy....

Origin and mobility of alkalies in two Dutch ASR-concretes. II: Microscale element distribution around sandstone and chert. Implications for the mechanism of ASR

River gravel used as aggregate for concrete in the Netherlands contains several potentially deleterious components with respect to alkali-silica reaction (ASR), viz. porous chert, chalcedony, and impure sandstones (greywackes. mica- and sericite-rich sandstones, siltstones, arkoses etc.). Whereas cherts and chalcedonies are virtually free from...

Centrifuge modeling of LNAPL transport in partially saturated sand

Model tests were performed at the Geotechnical Centrifuge Facility of Delft University of Technology, The Netherlands, to examine the mechanics of light nonaqueous phase liquid (LNAPL) movement in a partially saturated porous granular medium. The experiment simulated a 2D spill of LNAPL in an unsaturated sand prepared at two values of porosity....

A two-level network for recycling sand: A case study

In the Netherlands, the recycling of construction waste and in particular of sand creates an important logistic problem. New legislation ensures that disposal is reduced to a minimal level and this incentives recycling. Such measures cause an increase on the offer of sand (a subproduct of recycling construction waste) and create the need for...

Mapping submarine sand waves with multiband imaging radar - 2. Experimental results and model comparison

On August 16, 1989, and on July 12, 1991, experiments were performed to study the mapping of submarine sand waves with the airborne imaging radar, a polarimetric (and, in 1991, interferometric) airborne P, L, and C band synthetic aperture radar system. The experiments took place in an area 30 km off the coast of the Netherlands, where the bottom...

Skin and liver diseases induced in flounder (Platichthys flesus) after longterm exposure to contaminated sediments in large-scale mesocosms

Chemicals/CAS: Metals; Polychlorinated Biphenyls; Water Pollutants

Three-dimensional geomodelling for offshore aggregate resources assessment

Use of a three-dimensional geoscientific modelling system in offshore sand resources analysis is described. The benefits of a three-dimensional approach to geological modelling are that geologists can concentrate on geological interpretation without the constraints embodied in a two-dimensional approach and geological models can be used directly...