{"id":75,"date":"2019-11-27T15:17:29","date_gmt":"2019-11-27T15:17:29","guid":{"rendered":"http:\/\/aquifer.geology.buffalo.edu\/?p=75"},"modified":"2019-11-28T03:00:47","modified_gmt":"2019-11-28T03:00:47","slug":"groundwater-storage","status":"publish","type":"post","link":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/2019\/11\/27\/groundwater-storage\/","title":{"rendered":"Groundwater Storage"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Storage-1024x1024.jpg\" alt=\"\" class=\"wp-image-178\" srcset=\"https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Storage-1024x1024.jpg 1024w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Storage-150x150.jpg 150w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Storage-300x300.jpg 300w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Storage-768x768.jpg 768w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p>Objectives: Explore the relationship between confined and\nunconfined aquifer storage properties. <\/p>\n\n\n\n<p>1. Groundwater storage is defined by the term storativity (\nor storage coefficient), which represents the volume of water released from an\nunit area aquifer due to a unit drop in head.&nbsp;\nThis can be thought of as the volume of water (m<sup>3<\/sup>) drained\nfrom an aquifer that has an areal extent of one square meter and a decline of\nhead of one meter.&nbsp; However, the\nmechanisms for this draining of the aquifer a different for a unconfined\naquifer as compared to a confined aquifer.&nbsp;\nAs a result, we have to sub-terms for which specific yield describes\nstorage in a unconfined aquifer and specific storage describes storage in a\nconfined aquifer.&nbsp; Below is the equation\nthat relates these two sub-terms to storativity:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"304\" height=\"76\" src=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Screen-Shot-2019-11-27-at-10.16.59-AM.png\" alt=\"\" class=\"wp-image-76\" srcset=\"https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Screen-Shot-2019-11-27-at-10.16.59-AM.png 304w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Screen-Shot-2019-11-27-at-10.16.59-AM-300x75.png 300w\" sizes=\"auto, (max-width: 304px) 100vw, 304px\" \/><\/figure>\n\n\n\n<p>Where:<\/p>\n\n\n\n<p>V<sub>w<\/sub> is the volume of water released form the\naquifer [L<sup>3<\/sup>]<\/p>\n\n\n\n<p>h is the hydraulic head [L]<\/p>\n\n\n\n<p>A is the areal area of the aquifer you are evaluating [L<sup>2<\/sup>]<\/p>\n\n\n\n<p>S<sub>s<\/sub> is the specific storage [1\/L]<\/p>\n\n\n\n<p>b is the aquifer thickness [L]<\/p>\n\n\n\n<p>S<sub>y<\/sub> is the specific yield [-]<\/p>\n\n\n\n<p>Using the foldable aquifer models given below answer the\nfollowing questions assuming that the volume of water released in each of the\naquifers is 945 m<sup>3<\/sup>. <\/p>\n\n\n\n<p>A. Quantify the specific yield in the unconfined aquifer.<\/p>\n\n\n\n<p>B. Quantify the specific storage in the confined aquifer. <\/p>\n\n\n\n<p>C. Describe the difference between the storage mechanism in\nthe unconfined aquifer as compared to the confined aquifer. <\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"572\" height=\"471\" src=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/SpecificStorage.png\" alt=\"\" class=\"wp-image-144\" srcset=\"https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/SpecificStorage.png 572w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/SpecificStorage-300x247.png 300w\" sizes=\"auto, (max-width: 572px) 100vw, 572px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-file\"><a href=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/SpecificStorage.pdf\">Foldable Aquifer Model &#8211; Ss<\/a><a href=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/SpecificStorage.pdf\" class=\"wp-block-file__button\" download>Download<\/a><\/div>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"572\" height=\"471\" src=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/SpecificYield.png\" alt=\"\" class=\"wp-image-145\" srcset=\"https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/SpecificYield.png 572w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/SpecificYield-300x247.png 300w\" sizes=\"auto, (max-width: 572px) 100vw, 572px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-file\"><a href=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/SpecificYield.pdf\">Foldable Aquifer Model &#8211; Sy<\/a><a href=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/SpecificYield.pdf\" class=\"wp-block-file__button\" download>Download<\/a><\/div>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/\"><img decoding=\"async\" src=\"https:\/\/i.creativecommons.org\/l\/by-nc\/4.0\/88x31.png\" alt=\"Creative Commons License\"\/><\/a><\/figure>\n\n\n\n<p><br>This work is licensed under a <a href=\"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/\">Creative Commons Attribution-NonCommercial 4.0 International License<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Objectives: Explore the relationship between confined and unconfined aquifer storage properties. 1. Groundwater storage is defined by the term storativity ( or storage coefficient), which represents the volume of water released from an unit area aquifer due to a unit drop in head.&nbsp; This can be thought of as the volume of water (m3) drained &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/aquifer.geology.buffalo.edu\/index.php\/2019\/11\/27\/groundwater-storage\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Groundwater Storage&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-75","post","type-post","status-publish","format-standard","hentry","category-basics"],"_links":{"self":[{"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/75","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/comments?post=75"}],"version-history":[{"count":6,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/75\/revisions"}],"predecessor-version":[{"id":286,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/75\/revisions\/286"}],"wp:attachment":[{"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/media?parent=75"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/categories?post=75"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/tags?post=75"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}