Sediment size on talus slopes correlates with fracture spacing on bedrock cliffs: implications for predicting initial sediment size distributions on hillslopes

Grain size distribution effects on phosphate sorption by fluvial sediment: implications for modelling sediment- phosphate transport

A sensitivity analysis was performed on a sediment-phosphate transport model by determining the phosphate sorption characteristics of separated size fractions and prepared size distributions of fine-grained ( < 64 jum) river sediment typically transported in two southern Ontario streams. The Langmuir equation was used to quantify phosphate release from the sediment. Results of the study indicat...

Climate and topography control the size and flux of sediment produced on steep mountain slopes.

Weathering on mountain slopes converts rock to sediment that erodes into channels and thus provides streams with tools for incision into bedrock. Both the size and flux of sediment from slopes can influence channel incision, making sediment production and erosion central to the interplay of climate and tectonics in landscape evolution. Although erosion rates are commonly measured using cosmogen...

Evidence for nonlinear, diffusive sediment transport on hillslopes and implications for landscape morphology

Steep, soil-mantled hillslopes evolve through the downslope movement of soil, driven largely by slope-dependent transport processes. Most landscape evolution models represent hillslope transport by linear diffusion, in which rates of sediment transport are proportional to slope, such that equilibrium hillslopes should have constant curvature between divides and channels. On many soil-mantled hi...

Sediment transport by runoff on debris-mantled dryland hillslopes

A Transport Algorithm for Variable Sediment Sizes : Application to Wide Sediment Size Distributions

Total sediment transport was estimated as the summation of the transport rate of 12 sediment size fractions which were computed by an algorithm composed of three different transport relations An effective diameter for critical flow strength is used in the algorithm to account for the effect ofthe sediient mixture on the initiation of motion of each size fraction. Tests with laboratory and field...