{"id":103,"date":"2019-11-27T15:34:52","date_gmt":"2019-11-27T15:34:52","guid":{"rendered":"http:\/\/aquifer.geology.buffalo.edu\/?p=103"},"modified":"2019-11-28T02:57:43","modified_gmt":"2019-11-28T02:57:43","slug":"pumping-near-a-constant-head-boundary","status":"publish","type":"post","link":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/2019\/11\/27\/pumping-near-a-constant-head-boundary\/","title":{"rendered":"Pumping near a constant head boundary"},"content":{"rendered":"\n<p>\nObjectives: Quantify the drawdown in the potentiometric surface\ndue to groundwater pumping near a constant head boundary. \n\n<br>\n\n1. There are many cases in coastal aquifer where you must\ncalculate groundwater drawdown near an infinite source of water (i.e. the ocean\nor large lake).&nbsp; As a result of this configuration\nit is necessary to account for this boundary condition.&nbsp; To do this we use a method of images where a \u2018fake\u2019\nor image well is placed in the lake or ocean an equal distance between the pumping\nwell and the boundary.&nbsp; In the problem below,\nit is your job to determine the water level in well B due to pumping in the pumping\nwell at a pumping rate of 200 m<sup>3<\/sup>\/day (36.7 gal\/min).&nbsp; Note that before pumping there is a gradient\nacross the confined aquifer that shows water is flowing toward the lake.&nbsp; Use the foldable aquifer model provided to\nanswer the following question \n\n<br><br>\n\nA. Draw in map view a diagram showing the position of the\npumping well, observation well (well A) and image well. \n\n<br><br>\n\nB. Determine the water level in well A after pumping has\nreached steady state.\n\n<br><br>\n\nC. Explain how the results would change if there was no\ninitial gradient in the potentiometric surface prior to pumping.&nbsp; In your description please state where you\nwould expect to see the water level in well A.&nbsp;&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"745\" height=\"444\" src=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image-Well-Two-Wells.png\" alt=\"\" class=\"wp-image-117\" srcset=\"https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image-Well-Two-Wells.png 745w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image-Well-Two-Wells-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-Two-Wells.pdf\">Foldable Aquifer Model<\/a><a href=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Image-Well-Two-Wells.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: Quantify the drawdown in the potentiometric surface due to groundwater pumping near a constant head boundary. 1. There are many cases in coastal aquifer where you must calculate groundwater drawdown near an infinite source of water (i.e. the ocean or large lake).&nbsp; As a result of this configuration it is necessary to account for &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/aquifer.geology.buffalo.edu\/index.php\/2019\/11\/27\/pumping-near-a-constant-head-boundary\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Pumping near a constant head 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":[13],"tags":[],"class_list":["post-103","post","type-post","status-publish","format-standard","hentry","category-well-hydraulics"],"_links":{"self":[{"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/103","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=103"}],"version-history":[{"count":4,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/103\/revisions"}],"predecessor-version":[{"id":274,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/103\/revisions\/274"}],"wp:attachment":[{"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/media?parent=103"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/categories?post=103"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/tags?post=103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}