{"id":105,"date":"2019-11-27T15:35:30","date_gmt":"2019-11-27T15:35:30","guid":{"rendered":"http:\/\/aquifer.geology.buffalo.edu\/?p=105"},"modified":"2019-11-28T02:57:24","modified_gmt":"2019-11-28T02:57:24","slug":"pumping-near-a-no-flow-boundary","status":"publish","type":"post","link":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/2019\/11\/27\/pumping-near-a-no-flow-boundary\/","title":{"rendered":"Pumping near a no flow boundary"},"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\/Image_well_No_Flow-1024x1024.jpg\" alt=\"\" class=\"wp-image-173\" srcset=\"https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image_well_No_Flow-1024x1024.jpg 1024w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image_well_No_Flow-150x150.jpg 150w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image_well_No_Flow-300x300.jpg 300w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image_well_No_Flow-768x768.jpg 768w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p>\nObjectives: Determine the impact of a now flow boundary on\ngroundwater pumping in a confined aquifer. \n\n<br>\n\n1. Groundwater drawdowns in wells can be impacted in\naquifers that are adjacent to no flow boundaries, such as impermeable faults or\neven building foundations.&nbsp; These no flow\nboundaries cause an asymmetry in the cone of depression.&nbsp; In order to solve this style of problem, we\ncan use image wells, which are imaginary wells that are added to the system to\nrepresent drawdown at the no flow boundary.&nbsp;\nThe foldable aquifer model that is provided in the problem below asks\nyou to solve one of these drawdown problems, where the pumping well is adjacent a no\nflow boundary.&nbsp; Before pumping there is no\ngradient across the confined aquifer as shown by the dashed line.&nbsp; Use the foldable aquifer model provided to\nanswer the following question \n\n<br><br>\n\nA. Determine the pumping rate at the well needed to cause\nthe confined limestone aquifer to become unconfined adjacent to the fault.\n\n<br><br>\n\nB. Once the confined limestone aquifer becomes unconfined adjacent\nto the fault what is the direction of groundwater flow.&nbsp; If you were to then turn the pumping well off\nhow would this direction of groundwater flow change. \n\n<br><br>\n\nC. If the fault was replaced by a lake of infinite volume\nwhat would the pumping rate would be needed to cause the limestone aquifer to\nbecome unconfined.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"745\" height=\"445\" src=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image-Well-with-no-flow-boundary.png\" alt=\"\" class=\"wp-image-115\" srcset=\"https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image-Well-with-no-flow-boundary.png 745w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image-Well-with-no-flow-boundary-300x179.png 300w\" sizes=\"auto, (max-width: 706px) 89vw, (max-width: 767px) 82vw, 740px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-file\"><a href=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image-Well-with-no-flow-boundary.pdf\">Foldable Aquifer Model<\/a><a href=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image-Well-with-no-flow-boundary.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: Determine the impact of a now flow boundary on groundwater pumping in a confined aquifer. 1. Groundwater drawdowns in wells can be impacted in aquifers that are adjacent to no flow boundaries, such as impermeable faults or even building foundations.&nbsp; These no flow boundaries cause an asymmetry in the cone of depression.&nbsp; In order &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/aquifer.geology.buffalo.edu\/index.php\/2019\/11\/27\/pumping-near-a-no-flow-boundary\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Pumping near a no flow boundary&#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":[4,13],"tags":[],"class_list":["post-105","post","type-post","status-publish","format-standard","hentry","category-image-wells","category-well-hydraulics"],"_links":{"self":[{"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/105","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=105"}],"version-history":[{"count":5,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/105\/revisions"}],"predecessor-version":[{"id":273,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/105\/revisions\/273"}],"wp:attachment":[{"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/media?parent=105"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/categories?post=105"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/tags?post=105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}