Physics – Geophysics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3112503e&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 12, CiteID L12503
Physics
Geophysics
22
Global Change: Geomorphology And Weathering (1824, 1886), Hydrology: Geomorphology (1625), Mathematical Geophysics: Nonlinear Dynamics, Marine Geology And Geophysics: Seafloor Morphology And Bottom Photography
Scientific paper
Through laboratory experiments generating unidirectional water flows, we examine the process of interaction between two moving barchans (sandy bed configurations in a crescentic plan-shape), which may take dozens of years for barchan dunes in the nature. Three types of the interaction were observed. The first type was absorption of two barchans into one. The second was that the upstream fast barchan rode on the downstream slow barchan and simultaneously a newly born barchan was ejected from the lee side of the slow barchan. The third was that the downstream slow barchan was split into two before the upstream fast barchan touched the downstream. The type of the interaction was determined by both relative and absolute size of two barchans.
Endo Noritaka
Katsuki Atsunari
Taniguchi Keisuke
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