<?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>J.S. Rosenshein</dc:creator>
  <dc:date>1963</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;The upper 350 to 400 feet of rocks underlying&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Lake&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;County&lt;/span&gt;&lt;span&gt;,&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;Indiana&lt;/span&gt;&lt;span&gt;, form a single but complex hydrologic system. The rock units composing this system consist (&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;in&lt;/span&gt;&lt;span&gt;&amp;nbsp;ascending order) of dolomite, clay till (unit 4), glaciofluvial sand (unit 3), clay till (unit 2), and lacustrine sand, silt, and clay (unit 1). The dolomite and unit 3 form the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;principal&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;aquifers&lt;/span&gt;&lt;span&gt;&amp;nbsp;and the clay tills, units 4 and 2, the confining layers. The geohydrology of the confining layers controls to a large extent the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;rate&lt;/span&gt;&lt;span&gt;&amp;nbsp;at which the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;aquifers&lt;/span&gt;&lt;span&gt;&amp;nbsp;are recharged from local precipitation and, thereby, their potential yield. Unit 4, the dolomite's confining layer, has an estimated average vertical permeability of about 0.003 gpd (gallon per day) per square foot. Under present conditions of head difference, the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;rate&lt;/span&gt;&lt;span&gt;&amp;nbsp;of&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;recharge&lt;/span&gt;&lt;span&gt;&amp;nbsp;to the dolomite through unit 4 is estimated to average 20,000 gpd per square mile. Unit 2, the confining layer for unit 3, has an average estimated vertical permeability of about 0.007 gpd per square foot. Under present conditions of head difference the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;recharge&lt;/span&gt;&lt;span&gt;&amp;nbsp;through unit 3's confining layer is estimated to average about 100,000 gpd per square mile. However, these&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;rates&lt;/span&gt;&lt;span&gt;&amp;nbsp;of&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;recharge&lt;/span&gt;&lt;span&gt;&amp;nbsp;can be expected to increase as the head difference across each confining layer increases with extensive development of the&amp;nbsp;&lt;/span&gt;&lt;span class="ScopusTermHighlight"&gt;aquifer&lt;/span&gt;&lt;span&gt;.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1111/j.1745-6584.1963.tb01928.x</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>NGWA The Groundwater Association</dc:publisher>
  <dc:title>Recharge rates of principal aquifers in Lake County, Indiana</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>