{"id":1811,"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\/ch083-xhtml\/"},"modified":"2026-08-01T10:07:30","modified_gmt":"2026-08-01T10:07:30","slug":"exercise-3","status":"publish","type":"chapter","link":"https:\/\/books.gw-project.org\/an-introduction-to-hydraulic-testing-in-hydrogeology\/chapter\/exercise-3\/","title":{"raw":"Exercise 3","rendered":"Exercise 3"},"content":{"raw":"
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\r\n
\r\n\r\nAn irrigation well is designed and installed in a 50 m thick highly fractured sandstone that is overlain by 30 m of silt which is in turn overlain by 20 m of sand and gravel. The static water levels in the three units are similar, about 6 m below and surface. The production well is fully penetrating the water producing zone. A 6\u2011cm diameter, fully penetrating, observation well was constructed in the highly fractured sandstone 23 m from the production well. A 1.9\u2011day constant rate pumping test was conducted at a rate of 196 m3<\/sup>\/d and the observation well water levels were monitored with an electric water level sensor. The test conditions are illustrated in the image shown here.\r\n\r\n<\/div>\r\n
\"\"\r\n
\r\n
\r\n\r\nCross section of hydrogeologic conditions associated with a pumping test. A fractured sandstone is the principal water bearing unit. Static water levels in each unit are about 6 m below land surface. The water level time data collected during the test are shown in the table.\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n
\r\n\r\nAn Excel\u00ae data base of the time\u2011drawdown data is available on the web page for this book<\/a>\u2197.\r\n\r\n<\/div>\r\n
    \r\n \t
  1. Convert the water level data to drawdown and plot the data.<\/li>\r\n \t
  2. After reviewing the site data, select an analytical approach. Explain why you choose the analytical model used. Treat the highly fractured sandstone as an equivalent porous medium (Woessner & Poeter, 2020). Compute T<\/em> and S<\/em> for the highly fractured sandstone aquifer.<\/li>\r\n \t
  3. Based on your analysis, estimate the vertical hydraulic conductivity of the confining silt layer.<\/li>\r\n<\/ol>\r\n
    \r\n
    Solution to Exercise\u00a03<\/a><\/blockquote>\r\n<\/div>\r\n
    \r\n
    Return to where text linked to Exercise\u00a03<\/a><\/blockquote>\r\n<\/div>\r\n<\/div>\r\n
    <\/div>\r\n<\/div>","rendered":"
    \n
    \n
    \n

    An irrigation well is designed and installed in a 50 m thick highly fractured sandstone that is overlain by 30 m of silt which is in turn overlain by 20 m of sand and gravel. The static water levels in the three units are similar, about 6 m below and surface. The production well is fully penetrating the water producing zone. A 6\u2011cm diameter, fully penetrating, observation well was constructed in the highly fractured sandstone 23 m from the production well. A 1.9\u2011day constant rate pumping test was conducted at a rate of 196 m3<\/sup>\/d and the observation well water levels were monitored with an electric water level sensor. The test conditions are illustrated in the image shown here.<\/p>\n<\/div>\n

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

    Cross section of hydrogeologic conditions associated with a pumping test. A fractured sandstone is the principal water bearing unit. Static water levels in each unit are about 6 m below land surface. The water level time data collected during the test are shown in the table.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

    \n

    An Excel\u00ae data base of the time\u2011drawdown data is available on the web page for this book<\/a>\u2197.<\/p>\n<\/div>\n

      \n
    1. Convert the water level data to drawdown and plot the data.<\/li>\n
    2. After reviewing the site data, select an analytical approach. Explain why you choose the analytical model used. Treat the highly fractured sandstone as an equivalent porous medium (Woessner & Poeter, 2020). Compute T<\/em> and S<\/em> for the highly fractured sandstone aquifer.<\/li>\n
    3. Based on your analysis, estimate the vertical hydraulic conductivity of the confining silt layer.<\/li>\n<\/ol>\n
      \n

      Solution to Exercise\u00a03<\/a><\/p><\/blockquote>\n<\/div>\n

      \n

      Return to where text linked to Exercise\u00a03<\/a><\/p><\/blockquote>\n<\/div>\n<\/div>\n

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