J
John B. Southard
Researcher at Massachusetts Institute of Technology
Publications - 9
Citations - 844
John B. Southard is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Sediment & Sorting (sediment). The author has an hindex of 9, co-authored 9 publications receiving 819 citations. Previous affiliations of John B. Southard include University of California, San Diego.
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Downstream Fining by Selective Deposition in a Laboratory Flume
TL;DR: In an experiment using a long flume and a poorly sorted, bimodal gravel feed, downstream fining was produced by a factor of 1.3 in median size and 1.8 in 90th percentile size, over a distance of 21 meters.
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Experiments on Downstream Fining of Gravel: I. Narrow-Channel Runs
TL;DR: In this paper, the authors present the results of three laboratory experiments in which longitudinally sorted deposits were formed by feeding poorly sorted sediment at the upstream end of a narrow, 45m-long channel.
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Bed load transport of mixed size sediment: Fractional transport rates, bed forms, and the development of a coarse bed surface layer
TL;DR: In this article, the authors measured fractional transport rates, bed surface texture, and bed configuration after a mixed size sediment had reached an equilibrium transport state for seven different flow strengths in a recirculating laboratory flume.
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Abyssal Furrows and Hyperbolic Echo Traces on the Bahama Outer Ridge
Charles D. Hollister,Roger D. Flood,Roger D. Flood,David A. Johnson,Peter Lonsdale,John B. Southard +5 more
TL;DR: In this paper, the authors show that steep-sided, flat-floored furrows (1 to 100 m wide by 0.5 to 20 m deep) eroded into Holocene and Pleistocene hemipelagic mud are responsible for the characteristic hyperbolic echo traces on surface-ship echograms recorded over the Bahama Outer Ridge (water depth, 4 to 5 km).
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Sedimentation, resuspension and chemistry of particles in the northwest Atlantic
TL;DR: Sediment traps were deployed to sample vertical fluxes of particulate matter both immediately above and within the nepheloid layer on the continental slope and rise of the western North Atlantic.