{"id":265,"date":"2022-01-13T23:17:35","date_gmt":"2022-01-13T23:17:35","guid":{"rendered":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/chapter\/exercise-2\/"},"modified":"2022-01-16T22:07:49","modified_gmt":"2022-01-16T22:07:49","slug":"exercise-2","status":"publish","type":"chapter","link":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/chapter\/exercise-2\/","title":{"raw":"Exercise 2","rendered":"Exercise 2"},"content":{"raw":"<div class=\"exercise-2\">\r\n<p class=\"import-Normal\">The aquifer system shown in Figure\u00a0Exercise\u00a02\u20111 undergoes groundwater pumping. The decline of the water table\u00a0and piezometric head are recorded after 1 month and shown in the figure. The following information is available:<\/p>\r\n\r\n<ul>\r\n \t<li class=\"import-Normal\">aquitard: soil compressibility <em>c<\/em><sub><em>b<\/em><\/sub>\u00a0=\u00a010<sup>\u2011<\/sup><sup>3<\/sup>\u00a0bar<sup>\u2011<\/sup><sup>1<\/sup>;<\/li>\r\n \t<li class=\"import-Normal\">phreatic aquifer: porosity 35 percent, moisture content 10 percent, <em>c<\/em><sub><em>b<\/em><\/sub>\u00a0=\u00a010<sup>\u2011<\/sup><sup>4<\/sup>\u00a0bar<sup>\u2011<\/sup><sup>1<\/sup>; and,<\/li>\r\n \t<li class=\"import-Normal\">confined aquifer: <em>c<\/em><sub><em>b<\/em><\/sub>\u00a0=\u00a02\u00d710<sup>\u2011<\/sup><sup>5<\/sup>\u00a0bar<sup>\u2011<\/sup><sup>1<\/sup>;<\/li>\r\n<\/ul>\r\n<p class=\"import-Normal\">Compute the cumulative land subsidence after 1 month and after 10 years assuming that the pressure decrease within the aquifers remains constant and that the aquitard hydraulic conductivity is three orders of magnitude smaller than that of the aquifers.<\/p>\r\n<p class=\"import-Normal\"><img class=\"alignnone\" src=\"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-content\/uploads\/sites\/20\/2022\/01\/image36.png\" alt=\"Sketch of exercise 2.\" width=\"594\" height=\"636\" \/><\/p>\r\n<p class=\"import-Normal\"><strong>Figure<\/strong><strong>\u00a0Exercise\u00a0<\/strong><strong>2<\/strong><strong>\u2011<\/strong><strong>1<\/strong><strong>\u00a0<\/strong><strong>\u2011\u00a0<\/strong>Sketch of exercise 2.<\/p>\r\n<p class=\"import-Normal\" style=\"text-align: right;\"><a href=\"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/chapter\/exercise-2-solution\/\"><span class=\"import-Hyperlink\">Click here for <\/span><span class=\"import-Hyperlink\">solution<\/span><span class=\"import-Hyperlink\"> to<\/span> <span class=\"import-Hyperlink\">exercise <\/span><span class=\"import-Hyperlink\">2<\/span> <\/a><\/p>\r\n<p class=\"import-Normal\"><\/p>\r\n\r\n<\/div>","rendered":"<div class=\"exercise-2\">\n<p class=\"import-Normal\">The aquifer system shown in Figure\u00a0Exercise\u00a02\u20111 undergoes groundwater pumping. The decline of the water table\u00a0and piezometric head are recorded after 1 month and shown in the figure. The following information is available:<\/p>\n<ul>\n<li class=\"import-Normal\">aquitard: soil compressibility <em>c<\/em><sub><em>b<\/em><\/sub>\u00a0=\u00a010<sup>\u2011<\/sup><sup>3<\/sup>\u00a0bar<sup>\u2011<\/sup><sup>1<\/sup>;<\/li>\n<li class=\"import-Normal\">phreatic aquifer: porosity 35 percent, moisture content 10 percent, <em>c<\/em><sub><em>b<\/em><\/sub>\u00a0=\u00a010<sup>\u2011<\/sup><sup>4<\/sup>\u00a0bar<sup>\u2011<\/sup><sup>1<\/sup>; and,<\/li>\n<li class=\"import-Normal\">confined aquifer: <em>c<\/em><sub><em>b<\/em><\/sub>\u00a0=\u00a02\u00d710<sup>\u2011<\/sup><sup>5<\/sup>\u00a0bar<sup>\u2011<\/sup><sup>1<\/sup>;<\/li>\n<\/ul>\n<p class=\"import-Normal\">Compute the cumulative land subsidence after 1 month and after 10 years assuming that the pressure decrease within the aquifers remains constant and that the aquitard hydraulic conductivity is three orders of magnitude smaller than that of the aquifers.<\/p>\n<p class=\"import-Normal\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-content\/uploads\/sites\/20\/2022\/01\/image36.png\" alt=\"Sketch of exercise 2.\" width=\"594\" height=\"636\" \/><\/p>\n<p class=\"import-Normal\"><strong>Figure<\/strong><strong>\u00a0Exercise\u00a0<\/strong><strong>2<\/strong><strong>\u2011<\/strong><strong>1<\/strong><strong>\u00a0<\/strong><strong>\u2011\u00a0<\/strong>Sketch of exercise 2.<\/p>\n<p class=\"import-Normal\" style=\"text-align: right;\"><a href=\"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/chapter\/exercise-2-solution\/\"><span class=\"import-Hyperlink\">Click here for <\/span><span class=\"import-Hyperlink\">solution<\/span><span class=\"import-Hyperlink\"> to<\/span> <span class=\"import-Hyperlink\">exercise <\/span><span class=\"import-Hyperlink\">2<\/span> <\/a><\/p>\n<p class=\"import-Normal\">\n<\/div>\n","protected":false},"author":1,"menu_order":26,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-265","chapter","type-chapter","status-publish","hentry"],"part":164,"_links":{"self":[{"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/pressbooks\/v2\/chapters\/265","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":3,"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/pressbooks\/v2\/chapters\/265\/revisions"}],"predecessor-version":[{"id":427,"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/pressbooks\/v2\/chapters\/265\/revisions\/427"}],"part":[{"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/pressbooks\/v2\/parts\/164"}],"metadata":[{"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/pressbooks\/v2\/chapters\/265\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/wp\/v2\/media?parent=265"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/pressbooks\/v2\/chapter-type?post=265"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/wp\/v2\/contributor?post=265"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/wp\/v2\/license?post=265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}