Diffusion-controlled tracer retention in crystalline rock on the field scale

Details Diffusion-controlled tracer retention in crystalline rock on the field scale Diffusion-controlled tracer retention in crystalline rock on the field scale

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3713401c&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 13, CiteID L13401

Physics

2

Hydrology: Groundwater Transport, Hydrology: Rocks: Chemical Properties, Hydrology: Rocks: Physical Properties, Hydrology: Modeling (1952), Hydrology: Groundwater Quality

Scientific paper

Tracer retention is a key process for the barrier function of crystalline rock to any contaminant. Here we investigate the nature of retention mechanisms and their field-scale parametrization using results of a comprehensive tracer transport experiment in crystalline rock on the field scale (Äspö Hard Rock Laboratory, Sweden). A method for identifying dominant retention mechanisms and inferring key parameters on the site scale is presented. Taking advantage of multiple tracer tests with a wide range of sorption affinities, retention is shown to be diffusion-controlled. For the considered site, robust features of tracer migration can be reasonably well predicted within a rock volume on at least 200 m scale, by combining independent information with a simple model.

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