<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>W.L. Haushild</dc:contributor>
  <dc:creator>Robert K. Fahnestock</dc:creator>
  <dc:date>1962</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;During experiments on sediment&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;transport&lt;/span&gt;&lt;span&gt;&amp;nbsp;and resistance to flow with&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;a&lt;/span&gt;&lt;span&gt;&amp;nbsp;uniform 0.33-mm&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;sand&lt;/span&gt;&lt;span&gt;, data were recorded on the movement of individual rocks having intermediate diameters from about 0.1 to 0.5 foot. The experiments were conducted in&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;a&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;flume&lt;/span&gt;&lt;span&gt;&amp;nbsp;2 feet wide by 60 feet long and for most runs, depth was held constant at 0.5 foot. The experiments showed that rocks on the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;sand&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;bed&lt;/span&gt;&lt;span&gt;&amp;nbsp;moved downstream consistently only if the flow was in the upper regime - that is, only if the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;bed&lt;/span&gt;&lt;span&gt;&amp;nbsp;forms were plane&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;bed&lt;/span&gt;&lt;span&gt;, standing waves, or antidunes. The rocks moved at velocities that were approximately half the average velocity of the water. On all&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;bed&lt;/span&gt;&lt;span&gt;&amp;nbsp;forms in the lower flow regime (ripples, ripples superimposed upon dunes, and dunes), the rocks moved upstream and down into the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;bed&lt;/span&gt;&lt;span&gt;. That is, the rocks moved into&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;a&lt;/span&gt;&lt;span&gt;&amp;nbsp;scour pocket that formed at the upstream side of the rock. The movement upstream and down into the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;bed&lt;/span&gt;&lt;span&gt;&amp;nbsp;is limited by and approximately equal to the distance below the original rock position of the minimum&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;bed&lt;/span&gt;&lt;span&gt;&amp;nbsp;elevation plus approximately half the rock diameter. The data indicate that cross-bedded&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;sand&lt;/span&gt;&lt;span&gt;&amp;nbsp;deposits formed by the ripple or dune phases of&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;transport&lt;/span&gt;&lt;span&gt;&amp;nbsp;would contain few, if any,&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;pebbles&lt;/span&gt;&lt;span&gt;&amp;nbsp;or&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;cobbles&lt;/span&gt;&lt;span&gt;. Because the flow, in at least the downstream reaches, of most rivers is in the lower regime, the upstream movement and scour into the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;bed&lt;/span&gt;&lt;span&gt;&amp;nbsp;demonstrated in these experiments is an important factor in the sorting process.&amp;nbsp;&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1130/0016-7606(1962)73[1431:FSOTTO]2.0.CO;2</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Geological Society of America</dc:publisher>
  <dc:title>Flume studies of the transport of pebbles and cobbles on a sand bed</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>