Subpermafrost Groundwater Modelling in Ny-Ålesund, Svalbard


Booij, M. and Leijnse, A. and Haldorsen, S. and Heim, M. and Rueslatten, H. (1998) Subpermafrost Groundwater Modelling in Ny-Ålesund, Svalbard. Nordic hydrology, 29 (4/5). pp. 385-396. ISSN 0029-1277

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Abstract:Svalbard is a high arctic archipelago where the permafrost thickness is 150-450
m and almost continuous in ice-free areas. The model work was carried out in
N~-Alesundw, here the subpermafrost aquifers are recharged by water from the
bottom of the Vestre Lovtnbreen glacier. One main discharge spring is found at
the entrance of an old coal mine. The computer code SUTRA has been used to
simulate two-dimensional fluid movement and energy transport in the ground
under steady state conditions. For the simulation, a cross section with unit thickness
parallel to groundwater flow has been chosen. With the resulting output of
SUTRA, contour maps of the pressure, hydraulic head, temperature and velocity
have been made. Residence times for different situations have been determined
to be15 years as a minimum. In general there is a good agreement between the
physical reality and the simulation results
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