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UID:pretalx-flowpath-2025-EADLBG@talks.staging.osgeo.org
DTSTART;TZID=CET:20250611T170000
DTEND;TZID=CET:20250611T173000
DESCRIPTION:Deep geological repositories (DGRs) for isolating nuclear waste
  must be designed to last hundreds of thousands of years. Relevant process
 es needing consideration over such time scales include density-dependent f
 low\, glacial loading\, permafrost formation and thaw\, and heat and brine
  transport. Host geological media can be complex and heterogeneous\, inclu
 ding discrete fractures or fracture zones and depth-dependent hydraulic co
 nductivity. Numerical modelling can provide much needed insight into the b
 ehavior of these non-linear systems.\nIn this context\, the finite element
  model HEATFLOW/SMOKER has been further developed and applied to predict t
 he effect of glacial cycles and permafrost freeze/thaw on deep groundwater
  flow systems relevant to a DGR. Simulations are based on a 2D conceptual 
 model of the recently-approved Revell storage site in northern Ontario\, C
 anada.\nDriven by future projections of historic air temperatures\, glacie
 r base temperatures and glacier thickness\, the 120\,000-year simulations 
 show how permafrost can extend hundreds of metres deep\, potentially isola
 ting deep flow systems. Unfrozen zones (or taliks) potentially forming in 
 discharge zones\, remain a concern as pathways to surface.
DTSTAMP:20260427T221744Z
LOCATION:Room R3
SUMMARY:Numerical Model Development and Application to Nuclear Waste Storag
 e: Freeze & Thaw over Glacial Time Scales - John Molson
URL:https://talks.staging.osgeo.org/flowpath-2025/talk/EADLBG/
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