Show simple item record Larimer, Jeffrey Yager, Elowyn Yanites, Brian Witsil, Alex
dc.coverage.temporal These data were collected from October to December 2018. en 2021-02-02T18:31:41Z 2021-02-02T18:31:41Z 2021
dc.description.abstract Understanding bed load impact dynamics on exposed bedrock in rivers is crucial to quantifying the erosive energy of a stream. Observations of the bed load saltation trajectories and impact energies are lacking, particularly in channels with non-planar bed topography. In this study, we performed four flume experiments of saltating gravel to offer new insights on the dependence of particle impact dynamics on transport stage and bed topography. Our experiments used two different boundary shear stresses (τb= 36.5 and 25.4 Pa) and two different bed configurations, planar and non-planar (bedrock discs uniformly oriented at 10˚ from the bed surface). For each experiment, we indirectly estimated the impact energies from the trajectories of particles with high-speed video imaging and measured the erosion rates of rock samples embedded in the flume floor. The planar and non-planar beds had negative and constant relationships, respectively, between energy delivered to the bed and transport stage. The non-planar bed had a heavier tailed distribution of impact energy than the planar bed, which implies a greater number of rare highly erosive impacts. Probabilistic formulations of particle trajectories better predict the increase or decrease in erosion rate across experiments than deterministic regression equations. Our findings suggest that bedrock erosion models should consider a distribution of possible bed load impact energies, particularly for natural river channels that have rough surfaces. en
dc.description.sponsorship This work has been conducted with financial support from the Army Research Laboratory under grant W911NF-17-1-0248 en
dc.language.iso en en
dc.publisher Journal of Geophysical Research: Earth Surface en
dc.subject Saltation components hop height length angle diameter velocity en
dc.title Particle Saltation Data for "Flume Experiments on the Erosive Energy of Bed Load Impacts on Rough and Planar Beds" en
dc.type Dataset en
dc.description.methodology These data were collected using high-speed video and image processing algorithms. en
dc.description.file Empty cells indicate rolling or sliding of particles rather than a saltation en

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search IUScholarWorks

Advanced Search


My Account