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QUESTION 3 [15 Marks] 3.1 A confined aquifer with a depth of 100m has a hydraulic conductivity of 18m/d. A well that fully penetrates the aquifer is located 200m away from an observation well that reveals the following data (Table 3 and Figure 2 below), where linear, steady, horizontal flow is assumed. Table 2: Drawdown Data Observed at the Observation Well Time since pumping started (min) Drawdown (m) 10 0.69 20 1.88 30 2.34 60 2.47 Observation Well Pumping Well Ground Surface Distance Bedrock Figure 2: Schematic Cross-Section of the Aquifer System 3.1.1 What is the actual water table level at each time step? (4) 3.1.2 Calculate the average flow rate per unit area through the aquifer. (5) 3.2 A 40cm well fully penetrates a confined aquifer that has a depth of 40m and a hydraulic conductivity of 1.95 x 10 m/s. Two observation wells are located at 50m and 150m away, with a difference of drawdown between the two observations wells of 200cm. Calculate the rate of flow delivered by the pumping well. (6) Drawdown