In the hemi-arctic regions, the patterns of snow accumulation result from the spatial arrangement of topographic and vegetation units. At Poste-de-la-Baleine, Nouveau-Québec, the study of snow cover related to topography reveals that lowland sites and slopes with strong local relief and high declivity are locations of maximum deposition. High vegetation exercises a more efficient control upon snow conditions than low ones. /In forest stands, the snow cover is relatively continuous. There is a linear relation between snow cover density and snow depth. The variations follow an altitudinal gradient, In open fields, low vegetation units have little influence upon the snow accumulation ; wind is the determining factor. Densities are uniform and generally high whereas depths are uneven. As the season passes, snow accumulation tends to reshape the surface ; the topography is smoothed. The snow accumulation patterns seem to be constant from year to year.