{"id":1813,"date":"2026-02-14T04:27:47","date_gmt":"2026-02-14T04:27:47","guid":{"rendered":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/chapter\/ch084-xhtml\/"},"modified":"2026-08-01T10:07:41","modified_gmt":"2026-08-01T10:07:41","slug":"exercise-4","status":"publish","type":"chapter","link":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/chapter\/exercise-4\/","title":{"raw":"Exercise 4","rendered":"Exercise 4"},"content":{"raw":"
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\r\n\r\nA well (A) pumping at 900 m3<\/sup>\/d is located near a river as shown in the image below. The river penetrates a fractured, permeable, confined limestone. A second production well (B) is located 200 m from the first well. A previous pumping test of the formation at well A yielded a T<\/em> of 75 m2<\/sup>\/d and an S<\/em> of 0.00003.\r\n\r\n<\/div>\r\n
\r\n\r\n\"\"\r\n\r\n<\/div>\r\n
\r\n
Production wells located near a fully penetrating river. On average, the distance to the river in the confined aquifer is 30 m from the pumping well as shown by the red dashed line. a) Cross section showing production well A and the lithology. b) Map view of the well locations relative to the river.<\/blockquote>\r\n<\/div>\r\n
    \r\n \t
  1. Compute the well interference (drawdown) that would occur at B when well A is pumped at 900 m3<\/sup>\/d for 50 days.<\/li>\r\n \t
  2. If during the same 50 days of pumping well A, the well at location B is pumped at 450 m3<\/sup>\/d, what would be the drawdown at unpumped observation well C at the end of the 50 days of pumping?<\/li>\r\n<\/ol>\r\n
    \r\n
    Solution to Exercise\u00a04<\/a><\/blockquote>\r\n<\/div>\r\n
    \r\n
    Return to where text linked to Exercise\u00a04<\/a><\/blockquote>\r\n<\/div>\r\n<\/div>\r\n<\/div>","rendered":"
    \n
    \n
    \n

    A well (A) pumping at 900 m3<\/sup>\/d is located near a river as shown in the image below. The river penetrates a fractured, permeable, confined limestone. A second production well (B) is located 200 m from the first well. A previous pumping test of the formation at well A yielded a T<\/em> of 75 m2<\/sup>\/d and an S<\/em> of 0.00003.<\/p>\n<\/div>\n

    \n

    \"\"<\/p>\n<\/div>\n

    \n

    Production wells located near a fully penetrating river. On average, the distance to the river in the confined aquifer is 30 m from the pumping well as shown by the red dashed line. a) Cross section showing production well A and the lithology. b) Map view of the well locations relative to the river.<\/p><\/blockquote>\n<\/div>\n

      \n
    1. Compute the well interference (drawdown) that would occur at B when well A is pumped at 900 m3<\/sup>\/d for 50 days.<\/li>\n
    2. If during the same 50 days of pumping well A, the well at location B is pumped at 450 m3<\/sup>\/d, what would be the drawdown at unpumped observation well C at the end of the 50 days of pumping?<\/li>\n<\/ol>\n
      \n

      Solution to Exercise\u00a04<\/a><\/p><\/blockquote>\n<\/div>\n

      \n

      Return to where text linked to Exercise\u00a04<\/a><\/p><\/blockquote>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"author":8,"menu_order":77,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-1813","chapter","type-chapter","status-publish","hentry"],"part":599,"_links":{"self":[{"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/pressbooks\/v2\/chapters\/1813","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/wp\/v2\/users\/8"}],"version-history":[{"count":6,"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/pressbooks\/v2\/chapters\/1813\/revisions"}],"predecessor-version":[{"id":3708,"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/pressbooks\/v2\/chapters\/1813\/revisions\/3708"}],"part":[{"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/pressbooks\/v2\/parts\/599"}],"metadata":[{"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/pressbooks\/v2\/chapters\/1813\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/wp\/v2\/media?parent=1813"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/pressbooks\/v2\/chapter-type?post=1813"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/wp\/v2\/contributor?post=1813"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/wp-json\/wp\/v2\/license?post=1813"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}