<?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>Allen M. Shapiro</dc:contributor>
  <dc:creator>Daniel J. Goode</dc:creator>
  <dc:date>1991</dc:date>
  <dc:description>&lt;div class="t m0 x5 h7 y6 ff1 fs6 fc0 sc0 ls0 ws0"&gt;&lt;i&gt;Desbarats&lt;/i&gt; [1990] used a particle-tracking scheme to investigate the physics of three-dimensional solute transport in aquifers composed of two porous media of different hydraulic conductivities. The spatially heterogeneous fluid velocity was assumed to be the only mechanism of solute movement; local or pore scale dispersion and molecular diffusion were assumed to be negligible. The particle-tracking scheme used by Desbarats consisted of routing particles from node to node in a finite difference grid. In this scheme, the direction of an individual particle is randomly selected and the prob- ability associated with the particle movement in a given direction is proportional to the fluid flux in that direction. The same method was used by &lt;i&gt;Moreno et al.&lt;/i&gt; [1988] to investigate advective transport in a variable-aperture planar fracture.&amp;nbsp;&lt;/div&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1029/90WR02309</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>American Geophysical Union</dc:publisher>
  <dc:title>Comment on “Macrodispersion in sand-shale sequences” by A. J. Desbarats</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>