A rapid method for determining apparent diffusion coefficients in Chalk and other consolidated porous media

TL;DR: The study aims to provide a better understanding of the transfer processes in the unsaturated zone of the Chalk aquifer using different environmental tracers (nitrate, atrazine and tritium) using an underground quarry in northern France.

TL;DR: In this article, a numerical 1D diffusion model of the interface between freshwater in an upper, fractured aquifer and modified connate formation water below was used to simulate the observed chloride and δ18O profiles.

TL;DR: In this paper, the authors investigated fluctuations in nitrate concentration at the water table to improve understanding of unsaturated zone processes in the Chalk aquifer, using a novel multi-level sampler during periods of water table rise over 5 years.

TL;DR: The pumping and tracer test results and modeling presented illustrate the importance of recognizing the potential fractional nature of flow generated by partially penetrating boreholes in fractured aquifers in estimating aquifer properties and interpreting tracer breakthrough curves.

TL;DR: In this paper, the Chalk aquifer of England can be thought of as a multi-porosity medium, which generally has high porosity but small pore throats, so that its permeability is typically only 0.1 to 10 millidarcys (10−4 to 10−2 m day−1).

TL;DR: In this article, a laboratory diffusion-test estimation of the diffusion coefficient (D ) and the adsorption coefficient (K d ) for several volatile organic species in a saturated, relatively undisturbed, clayey soil is presented.

TL;DR: In this article, double-packer injection tests have been carried out in a borehole in the Chalk of Hampshire and in the Permian Penrith Sandstone of Cumbria, England.

TL;DR: In this article, the equations describing transport in fissured media, where transport in the matrix blocks is diffusive, are reduced to the standard form of a differential equation for the fissure phase.