How accurate is predictive modeling of groundwater transport?: A case study of advection, macrodispersion, and diffusive mass transfer at the Forsmark site (Sweden)
2013 (English)In: Water resources research, ISSN 0043-1397, E-ISSN 1944-7973, Vol. 49, no 9, 5317-5327 p.Article in journal (Refereed) Published
We study predictive modeling of groundwater transport that accounts for three mechanisms: mean advection, macrodispersion, and mass transfer. A general methodology is presented and applied to a series of nonsorbing tracer tests along multiple pathways on scales ranging from ca. 70 to 300 m, in a highly heterogeneous aquifer at Forsmark (Sweden). The mean water residence time cannot be predicted well using a simple water balance model. Longitudinal macrodispersivity (L) (L) and a mass transfer parameter group (1/root T) are extrapolated from the control tracer experiments, to yield accurate predictions of tracer discharge, once the mean water residence time is constrained. A relatively simple modeling framework based on Fickian macrodispersion and diffusion seems to be adequate for reproducing the tracer discharge in this complex and highly heterogeneous porous media.
Place, publisher, year, edition, pages
2013. Vol. 49, no 9, 5317-5327 p.
groundwater transport, predictive modeling, accuracy, field-scale tracer experiments, macrodispersion, diffusive mass transfer, travel time
IdentifiersURN: urn:nbn:se:kth:diva-134587DOI: 10.1002/wrcr.20429ISI: 000325991100015ScopusID: 2-s2.0-84883303732OAI: oai:DiVA.org:kth-134587DiVA: diva2:667751
QC 201311272013-11-272013-11-252013-11-27Bibliographically approved