Soil freeze-thaw-induced changes to a simulated rill : potential impacts on soil erosion

Auteur :
GATTO, L.W.

Description :
The objective of this study was to measure the effects of one of the soil processes that affect rill geometry, soil freeze-thaw (FT) cycling. An unvegetated rectangular rill was subjected to 2 FT cycles, each lasting several days, in a controlled laboratory setting. The FT cycling increased the water content and reduced the cohesion in the surface soil along the rill sufficiently to induce soil slumps and mud flows along the sidewalls of the rill. These mass failures changed the rectangular rill to a triangular one. Using Manning's equation, it was estimated that this new geometry could reduce the velocity of the flow.


Type de document :
Article de périodique

Source :
Geomorphology (Amsterdam), issn : 0169-555X, 2000, vol. 32, n°. 1-2, p. 147-160, Collation : Illustration, Références bibliographiques : 37 ref.

Date :
2000

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier