<?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. Back</dc:contributor>
  <dc:contributor>B.B. Hanshaw</dc:contributor>
  <dc:creator>J.D. Bredehoeft</dc:creator>
  <dc:date>1982</dc:date>
  <dc:description>&lt;p&gt;A number of important ideas, developed during the past 100 years, form the framework of the present understanding of regional ground-water flow. The most important of these ideas are:&lt;/p&gt;&lt;ol id="list-1" class="list-ord" compact="compact"&gt;&lt;li id="list-item-1"&gt;&lt;p id="p-2"&gt;Differences in topographic elevation provide the principal driving force for regional flow.&lt;/p&gt;&lt;/li&gt;&lt;li id="list-item-2"&gt;&lt;p id="p-3"&gt;Flow through confining layers forms an essential element of regional flow systems.&lt;/p&gt;&lt;/li&gt;&lt;li id="list-item-3"&gt;&lt;p id="p-4"&gt;Chemical evolution within the flow systems can be used to understand the flow.&lt;/p&gt;&lt;/li&gt;&lt;li id="list-item-4"&gt;&lt;p id="p-5"&gt;Moving ground water is an efficient transport mechanism for heat within the Earth.&lt;/p&gt;&lt;/li&gt;&lt;li id="list-item-5"&gt;&lt;p id="p-6"&gt;We trace the evolution of these ideas in the United States and demonstrate their influence on the present-day understanding of flow systems with examples taken primarily from the American literature.&lt;/p&gt;&lt;/li&gt;&lt;/ol&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1130/SPE189-p295</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Geological Society of America</dc:publisher>
  <dc:title>Regional ground-water flow concepts in the United States: Historical perspective</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>