Scaling of surface water-subsurface water interaction with implication to hydrogeological site evaluations
2008 (English)In: The 12th International High-Level Radioactive Waste Management Conference (IHLRWM), American Nuclear Society , 2008Conference paper (Refereed)
Land surface topography governs the groundwater flow patterns at the regional-to-continental scale and on smaller scales such as in the hyporheic zone of streams. This produces a complicated groundwater circulation pattern that controls releases of radionuclides from a underground nuclear waste repository. Here we utilise a new spectral technique to analytically solve the groundwater flow with account taken to the spectrum of topographical scales on the continent, depth decaying permeability with depth and quaternary deposits. The proposed solution makes it possible to independently analyse the effects on the flow generated by topographical features on various scales. Basically, all topographical scales have the same influence on groundwater exchange with surface water, but the decaying permeability with depth in bedrock causes a predominance of local scales. Discharge of radionuclides from a deep repository placed in bedrock occurs in major rivers and streams where we find the thickest layers of quaternary deposits in post-glacial landscapes. The high sorption affinity in soil implies that radionuclides spend a very long time in quaternary deposits on their travel from an underground repository through bedrock and stream network to the sea.
Place, publisher, year, edition, pages
American Nuclear Society , 2008.
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-84691ScopusID: 2-s2.0-70449130240ISBN: 978-0-89448-062-1OAI: oai:DiVA.org:kth-84691DiVA: diva2:499534
12th International High-Level Radioactive Waste Management Conference 2008. Las Vegas, NV. 7 September 2008 - 11 September 2008
QC 201202142012-02-132012-02-132012-02-14Bibliographically approved