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Background |
Model Setup |
Model Run Movies |
Model Analysis |
Discussions and Conclusions |
Stage 2: Valley-Piedmont Transition Flow
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| Location of Data Points Used in Stage 2 Analyses |
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| Velocity is centered just above
the valley-to-plain transition, with deceleration at the toe on the flat continental
plain and towards the walls. Velocity gradiaents at the toe are not
well constrained by data points (see figure to left). |
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Compression/Tension |
Compression/Tension |
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| Large center of extension (blue)
associated with the lateral spreading of the glacier across the unconfined
continental plain once beyond the mouth of the valley. Contour "knots"
are an artifact of few data points. |
Area of compression (red) at
the mouth of the valley due to deceleration in the y-direction as the glacier
moves to the lower surface slope of the continental plain. |
Shear strain plot shows same
pattern as in valley flow, with a region of 0 shear strain along the center
y-axis of the glacier and opposing shear on either side due to drag along
the valley walls. |
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| Dilatiation is minimal and without
obvious patterns as observed in valley flow. |
Vorticity is focused at the corners
of the valley mouth with opposing rotation on either side of the valley.
Rotation in these regions is moderately constrained by data points. |