{"id":73,"date":"2019-11-27T15:15:18","date_gmt":"2019-11-27T15:15:18","guid":{"rendered":"http:\/\/aquifer.geology.buffalo.edu\/?p=73"},"modified":"2020-02-14T21:41:07","modified_gmt":"2020-02-14T21:41:07","slug":"porosity-and-grain-packing","status":"publish","type":"post","link":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/2019\/11\/27\/porosity-and-grain-packing\/","title":{"rendered":"Porosity and Grain Packing"},"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\/Grains4-1024x1024.jpg\" alt=\"\" class=\"wp-image-151\" srcset=\"https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Grains4-1024x1024.jpg 1024w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Grains4-150x150.jpg 150w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Grains4-300x300.jpg 300w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Grains4-768x768.jpg 768w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n\n\n\n<p> Objectives: Determine the relationship between grain packing and porosity of an aquifer.  <br> 1. Porosity describes the percentage of void space in a cubic unit (volume) of an aquifer.\u00a0 This porosity is controlled by the packing (geometry) of grains.\u00a0 In this problem we are going to explore the simplest of packing: Cubic Packing.\u00a0 As a warm up we will first look at the porosity of a single grain of sand inside a cubic value of aquifer. \u00a0The second part of this problem will explore cubic packing with eight grains inside a square volume of aquifer. Use the foldable aquifer model provided to answer the following questions. <br><br> A. Determine the porosity of the cubic aquifer with a single spherical grain. <br><br> B. Determine the porosity of an aquifer with cubic packing. <br><br> C. Explain the relationship between the porosity of the single spherical grain model and the cubic pacing model with eight grains.\u00a0<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"542\" height=\"542\" src=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Porosity_one_Grain.png\" alt=\"\" class=\"wp-image-147\" srcset=\"https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Porosity_one_Grain.png 542w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Porosity_one_Grain-150x150.png 150w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Porosity_one_Grain-300x300.png 300w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Porosity_one_Grain-100x100.png 100w\" sizes=\"auto, (max-width: 542px) 100vw, 542px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-file\"><a href=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Porosity_one_Grain.pdf\">Foldable Aquifer Model<\/a><a href=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/Porosity_one_Grain.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=\"542\" height=\"542\" src=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/CubicPacking_Porosity.png\" alt=\"\" class=\"wp-image-148\" srcset=\"https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/CubicPacking_Porosity.png 542w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/CubicPacking_Porosity-150x150.png 150w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/CubicPacking_Porosity-300x300.png 300w, https:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/CubicPacking_Porosity-100x100.png 100w\" sizes=\"auto, (max-width: 542px) 100vw, 542px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-file\"><a href=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/CubicPacking_Porosity.pdf\">Foldable Aquifer Model<\/a><a href=\"http:\/\/aquifer.geology.buffalo.edu\/wp-content\/uploads\/2019\/11\/CubicPacking_Porosity.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 relationship between grain packing and porosity of an aquifer. 1. Porosity describes the percentage of void space in a cubic unit (volume) of an aquifer.\u00a0 This porosity is controlled by the packing (geometry) of grains.\u00a0 In this problem we are going to explore the simplest of packing: Cubic Packing.\u00a0 As a warm &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/aquifer.geology.buffalo.edu\/index.php\/2019\/11\/27\/porosity-and-grain-packing\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Porosity and Grain Packing&#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":[10,5],"tags":[],"class_list":["post-73","post","type-post","status-publish","format-standard","hentry","category-basics","category-porosity"],"_links":{"self":[{"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/73","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=73"}],"version-history":[{"count":6,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/73\/revisions"}],"predecessor-version":[{"id":293,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/posts\/73\/revisions\/293"}],"wp:attachment":[{"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/media?parent=73"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/categories?post=73"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aquifer.geology.buffalo.edu\/index.php\/wp-json\/wp\/v2\/tags?post=73"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}