内灣における砂粒運搬の一型式(豫報) : Floating Transportation

概要

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l., Some observations and experiments were made on the transportation of sand by floatation in Matsukawa Bay, Fukushima Prefecture., 2., The amount of sand transported by floatation by a gentle rising tide was calculated to be 117-154 kilograms per hour, and the distance of transportation was estimated to be 250 meters along the shore line of a sand bar., 3., The median diameter of the floating sand was somewhat greater than that of the beach sand in both natural and artificial floatation., 4., Of the sand grains exceeding 1/4 millimeter in size, the sphericity and roundness of the floating sand was somewhat less (more angular) than that of the beach sand., In the case of sand grains less than 1/4 millimeter in size no difference was noted in their degree of roundness., 5., The sorting coefficient and skewness which indicate slight anomalies showed no general tendency., 6., It may be of some geological interest that transportation of sand by floating takes place only when the water is so calm that other agencies such as traction, saltation and suspension fail to occur., It is also of interest that selective sorting by floatation may result in the deposition of particular sediments after transportation.,
日本地質学会の論文
1954-03-25