{"id":206,"date":"2020-10-15T23:51:47","date_gmt":"2020-10-15T23:51:47","guid":{"rendered":"https:\/\/books.gw-project.org\/groundwater-resource-development\/chapter\/box-1-regional-unconfined-aquifer-system-the-high-plains-aquifer\/"},"modified":"2020-12-15T14:11:20","modified_gmt":"2020-12-15T14:11:20","slug":"box-1-regional-unconfined-aquifer-system-the-high-plains-aquifer","status":"publish","type":"chapter","link":"https:\/\/books.gw-project.org\/groundwater-resource-development\/chapter\/box-1-regional-unconfined-aquifer-system-the-high-plains-aquifer\/","title":{"raw":"Box\u00a01\u00a0-\u00a0Regional Unconfined Aquifer System: The High Plains Aquifer","rendered":"Box\u00a01\u00a0&#8211;\u00a0Regional Unconfined Aquifer System: The High Plains Aquifer"},"content":{"raw":"The High Plains aquifer in the central United States provides a good example of applying the approach of estimating depletion volume by integrating head changes and storage coefficient estimates. Water-level changes in this regionally extensive unconfined aquifer have been estimated from many water-level measurements in a large number of observation wells over many years, producing maps of water-level changes since predevelopment times (Figure Box 1-1).\r\n\r\n\r\n[caption id=\"attachment_269\" align=\"alignnone\" width=\"690\"]<img class=\"wp-image-269 size-large\" src=\"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-content\/uploads\/sites\/5\/2020\/10\/Fig.B1.HP-WLChng.SIR2017_5040_LKonikow_3-690x1024.jpg\" alt=\"Map showing changes in groundwater levels in the High Plains aquifer\" width=\"690\" height=\"1024\" \/> <strong>Figure Box 1-1 -<\/strong> Changes in groundwater levels in the High Plains aquifer, from predevelopment conditions (about 1950) to 2015 (from McGuire, 2017).[\/caption]\r\n\r\nThe area-weighted average specific yield varies by State from 0.081 in Wyoming to 0.185 in Oklahoma and is 0.151 overall for the aquifer (McGuire, 2017; Gutentag et al., 1984; McGuire et al., 2012). McGuire (2017) accounts for this spatial variation and estimates that the total cumulative groundwater storage depletion in the High Plains aquifer since about 1950 is approximately 273.2 million acre-feet (337 km<sup>3<\/sup>).\r\n<p style=\"text-align: right;\"><a href=\"https:\/\/books.gw-project.org\/groundwater-resource-development\/chapter\/methods-to-estimate-depletion#TextLinkToBox1\">Return to where text links to Box 1<\/a><\/p>\r\n","rendered":"<p>The High Plains aquifer in the central United States provides a good example of applying the approach of estimating depletion volume by integrating head changes and storage coefficient estimates. Water-level changes in this regionally extensive unconfined aquifer have been estimated from many water-level measurements in a large number of observation wells over many years, producing maps of water-level changes since predevelopment times (Figure Box 1-1).<\/p>\n<figure id=\"attachment_269\" aria-describedby=\"caption-attachment-269\" style=\"width: 690px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-269 size-large\" src=\"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-content\/uploads\/sites\/5\/2020\/10\/Fig.B1.HP-WLChng.SIR2017_5040_LKonikow_3-690x1024.jpg\" alt=\"Map showing changes in groundwater levels in the High Plains aquifer\" width=\"690\" height=\"1024\" srcset=\"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-content\/uploads\/sites\/5\/2020\/10\/Fig.B1.HP-WLChng.SIR2017_5040_LKonikow_3-690x1024.jpg 690w, https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-content\/uploads\/sites\/5\/2020\/10\/Fig.B1.HP-WLChng.SIR2017_5040_LKonikow_3-202x300.jpg 202w, https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-content\/uploads\/sites\/5\/2020\/10\/Fig.B1.HP-WLChng.SIR2017_5040_LKonikow_3-768x1140.jpg 768w, https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-content\/uploads\/sites\/5\/2020\/10\/Fig.B1.HP-WLChng.SIR2017_5040_LKonikow_3-1035x1536.jpg 1035w, https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-content\/uploads\/sites\/5\/2020\/10\/Fig.B1.HP-WLChng.SIR2017_5040_LKonikow_3-1380x2048.jpg 1380w, https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-content\/uploads\/sites\/5\/2020\/10\/Fig.B1.HP-WLChng.SIR2017_5040_LKonikow_3-65x96.jpg 65w, https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-content\/uploads\/sites\/5\/2020\/10\/Fig.B1.HP-WLChng.SIR2017_5040_LKonikow_3-225x334.jpg 225w, https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-content\/uploads\/sites\/5\/2020\/10\/Fig.B1.HP-WLChng.SIR2017_5040_LKonikow_3-350x519.jpg 350w, https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-content\/uploads\/sites\/5\/2020\/10\/Fig.B1.HP-WLChng.SIR2017_5040_LKonikow_3.jpg 1454w\" sizes=\"auto, (max-width: 690px) 100vw, 690px\" \/><figcaption id=\"caption-attachment-269\" class=\"wp-caption-text\"><strong>Figure Box 1-1 &#8211;<\/strong> Changes in groundwater levels in the High Plains aquifer, from predevelopment conditions (about 1950) to 2015 (from McGuire, 2017).<\/figcaption><\/figure>\n<p>The area-weighted average specific yield varies by State from 0.081 in Wyoming to 0.185 in Oklahoma and is 0.151 overall for the aquifer (McGuire, 2017; Gutentag et al., 1984; McGuire et al., 2012). McGuire (2017) accounts for this spatial variation and estimates that the total cumulative groundwater storage depletion in the High Plains aquifer since about 1950 is approximately 273.2 million acre-feet (337 km<sup>3<\/sup>).<\/p>\n<p style=\"text-align: right;\"><a href=\"https:\/\/books.gw-project.org\/groundwater-resource-development\/chapter\/methods-to-estimate-depletion#TextLinkToBox1\">Return to where text links to Box 1<\/a><\/p>\n","protected":false},"author":1,"menu_order":1,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-206","chapter","type-chapter","status-publish","hentry"],"part":189,"_links":{"self":[{"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/pressbooks\/v2\/chapters\/206","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":8,"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/pressbooks\/v2\/chapters\/206\/revisions"}],"predecessor-version":[{"id":383,"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/pressbooks\/v2\/chapters\/206\/revisions\/383"}],"part":[{"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/pressbooks\/v2\/parts\/189"}],"metadata":[{"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/pressbooks\/v2\/chapters\/206\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/wp\/v2\/media?parent=206"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/pressbooks\/v2\/chapter-type?post=206"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/wp\/v2\/contributor?post=206"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/books.gw-project.org\/groundwater-resource-development\/wp-json\/wp\/v2\/license?post=206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}