ABSTRACT: Erosion balance and slope evolution under continental humid temperate climate: An Appalachian example (Quebec, Canada)

CGRG Bibliography of Canadian Geomorphology
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Abstract

Solid and dissolved matter net output from a sample slope, subdivided into 5 homogeneous segments, is estimated from multi-annual erosion measurements in a small low-relief watershed covered with till-derived soils. Chemical processes prevail all over, except on the most inclined segments (>8-10 degree , mainly in the slope inflexion zone). This is consistent with the constantly humid climate, the fresh earth material, and the dense vegetation cover. Polynomial fitting of solute and total losses against slope length and angle are used to predict profile evolution. The latter thus mainly results from rock-controlled lowering of the inferior segments, on which water maintains its aggressiveness, and backwearing of the inflexion zone where mechanical action prevails. Altitude differences, which are controlled by unequal rock resistance, consequently should increase since weathering on upper segments, under podzolisation processes, should be less and less effective because of the depletion of easily alterable minerals.

Bibliography of Canadian Geomorphology