<?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:creator>John A. Moody</dc:creator>
  <dc:date>2019</dc:date>
  <dc:description>&lt;p id="sp0080"&gt;Fluvial features such as floodplains and point bars are built by sediment deposition and sculpted by erosion. Long-term measurements (38 yr) of the cross-section topography of active floodplains and point bars along the freely-meandering Powder River in southeastern Montana, USA (mean daily discharge of 12.5 m&lt;sup&gt;3&lt;/sup&gt; s&lt;sup&gt;−1&lt;/sup&gt;), were used to develop dynamic relations between annual sediment deposition and peak-flood discharge. Five floodplain sections and five point-bar sections were selected from 24 cross sections along a 90-km study reach. At each cross section the sediment deposition volume per unit streamwise distance was computed as the difference between two topographic surveys made in consecutive years.&lt;/p&gt;&lt;p id="sp0085"&gt;&lt;span&gt;Snowmelt floods were found to be the dominant annual process. However, other processes such as flash floods,&amp;nbsp;&lt;a class="topic-link" title="Learn more about ice breakup from ScienceDirect's AI-generated Topic Pages" href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/ice-breakup" data-mce-href="https://www.sciencedirect.com/topics/earth-and-planetary-sciences/ice-breakup"&gt;ice breakup&lt;/a&gt;&amp;nbsp;floods, and autumnal floods were important episodically. The dynamic relations were linear for both fluvial features. The snowmelt deposition-discharge relations showed, in general, that point bars were about two times more efficient at trapping sediment than floodplains. Each relation had a discharge threshold that must be exceeded before sediment was deposited. Although these discharge thresholds for floodplains and point bars had essentially the same mean value (69 and 71 m&lt;/span&gt;&lt;sup&gt;3&lt;/sup&gt; s&lt;sup&gt;−1&lt;/sup&gt;, respectively), they represented different processes. Thresholds for other rivers will probably differ from those for Powder River because of different channel geometry and sediment characteristics.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1016/j.geomorph.2018.11.032</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Elsevier</dc:publisher>
  <dc:title>Dynamic relations for the deposition of sediment on floodplains and point bars of a freely-meandering river</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>