Evaluation of single-well injection-withdrawal tests in Swedish crystalline rock using the Lagrangian travel time approach
2011 (English)In: Water resources research, ISSN 0043-1397, E-ISSN 1944-7973, Vol. 47, W02527- p.Article in journal (Refereed) Published
A series of 10 single-well injection-withdrawal (SWIW) tests are evaluated with two tracers each: uranine and cesium (Cs). An evaluation tool for SWIW tests in crystalline rock is presented on the basis of the Lagrangian travel time approach, whereby probabilities of tracer particle residence times are computed for key stages of the test cycle. Calibration results for three transport parameters and each breakthrough curve are presented. We show that estimates of the controlling retention parameter group psi [1/root T] are robust for Cs but highly uncertain for uranine. The estimated retention for Cs is larger for the Laxemar-Simpevarp site compared to the Forsmark site. Deviations from the -3/2 asymptotic breakthrough curve slope observed in a few of the tests at Forsmark are possibly due to a thin fracture coating that has been identified in mineralogical studies at some locations of the site.
Place, publisher, year, edition, pages
2011. Vol. 47, W02527- p.
TRACER TESTS, MATRIX DIFFUSION, FRACTURED ROCKS, TRANSPORT, AQUIFERS, SOLUTE, FLOW
IdentifiersURN: urn:nbn:se:kth:diva-31297DOI: 10.1029/2010WR009627ISI: 000287535000003ScopusID: 2-s2.0-79951994707OAI: oai:DiVA.org:kth-31297DiVA: diva2:405182
QC 201103212011-03-212011-03-142011-03-21Bibliographically approved