{"id":267,"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-3\/"},"modified":"2022-01-16T22:10:07","modified_gmt":"2022-01-16T22:10:07","slug":"exercise-3","status":"publish","type":"chapter","link":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/chapter\/exercise-3\/","title":{"raw":"Exercise 3","rendered":"Exercise 3"},"content":{"raw":"<div class=\"exercise-3\">\r\n<p class=\"import-Normal\">Groundwater is pumped from the two confined aquifers shown in Figure\u00a0Exercise\u00a03\u20111. After 1 year, a cumulative land subsidence equal to 0.1\u00a0m is measured at the land surface. The piezometric drawdown recorded at the same time in aquifer\u00a01 and aquifer\u00a02 amounts to 20\u00a0m and 15\u00a0m, respectively. Assuming a steady state pressure in the intervening aquitard, and the following ratios between the layer compressibility <em>c<\/em><sub><em>b,aquifer<\/em><\/sub><sub><em>1<\/em><\/sub>\u00a0=\u00a02\u00a0<em>c<\/em><sub><em>b,aquifer2<\/em><\/sub> and <em>c<\/em><sub><em>b,aquifer1<\/em><\/sub>\u00a0=\u00a00.1\u00a0<em>c<\/em><sub><em>b,aquitard<\/em><\/sub>, compute the compressibility of the three soil layers.<\/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\/image37.png\" alt=\"Sketch of exercise 3\" width=\"506\" height=\"387\" \/><\/p>\r\n<p class=\"import-Normal\"><strong>Figure\u00a0<\/strong><strong>3<\/strong><strong>\u2011<\/strong><strong>1<\/strong><strong>\u00a0<\/strong><strong>\u2011\u00a0<\/strong>Sketch of exercise 3.<\/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-3-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\">3<\/span> <\/a><\/p>\r\n<p class=\"import-Normal\"><\/p>\r\n\r\n<\/div>","rendered":"<div class=\"exercise-3\">\n<p class=\"import-Normal\">Groundwater is pumped from the two confined aquifers shown in Figure\u00a0Exercise\u00a03\u20111. After 1 year, a cumulative land subsidence equal to 0.1\u00a0m is measured at the land surface. The piezometric drawdown recorded at the same time in aquifer\u00a01 and aquifer\u00a02 amounts to 20\u00a0m and 15\u00a0m, respectively. Assuming a steady state pressure in the intervening aquitard, and the following ratios between the layer compressibility <em>c<\/em><sub><em>b,aquifer<\/em><\/sub><sub><em>1<\/em><\/sub>\u00a0=\u00a02\u00a0<em>c<\/em><sub><em>b,aquifer2<\/em><\/sub> and <em>c<\/em><sub><em>b,aquifer1<\/em><\/sub>\u00a0=\u00a00.1\u00a0<em>c<\/em><sub><em>b,aquitard<\/em><\/sub>, compute the compressibility of the three soil layers.<\/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\/image37.png\" alt=\"Sketch of exercise 3\" width=\"506\" height=\"387\" \/><\/p>\n<p class=\"import-Normal\"><strong>Figure\u00a0<\/strong><strong>3<\/strong><strong>\u2011<\/strong><strong>1<\/strong><strong>\u00a0<\/strong><strong>\u2011\u00a0<\/strong>Sketch of exercise 3.<\/p>\n<p class=\"import-Normal\" style=\"text-align: right;\"><a href=\"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/chapter\/exercise-3-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\">3<\/span> <\/a><\/p>\n<p class=\"import-Normal\">\n<\/div>\n","protected":false},"author":1,"menu_order":27,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-267","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\/267","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\/267\/revisions"}],"predecessor-version":[{"id":429,"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/pressbooks\/v2\/chapters\/267\/revisions\/429"}],"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\/267\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/wp\/v2\/media?parent=267"}],"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=267"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/wp\/v2\/contributor?post=267"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/books.gw-project.org\/land-subsidence-and-its-mitigation\/wp-json\/wp\/v2\/license?post=267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}