4. For a confined well with 1000gpd withdrawal the draw dawn from several observation well was given in table below. Calculate the following: (a) Using the Thiem formula, complete the table; (b) On semi-log graph paper, plot the final draw-down for each observation well with the log distance from the pumping well. Draw the best fitting line through the four points and obtain the rate of draw-down per log cycle Then obtain the transmissivity value using Thiem equation and finally compare with the values obtained in parts (a) and (b). r₁ (feet) r2(feet) s2(feet) kB(gpd/ft) $₁(feet) 3.57 295.0 98.0 7.34 7.34 3.57 2.35 7.34 98.0 2.6 2.6 98.0 295.0 2.6 295.0 705.0 705.0 705 2.35 3.57 2.35 0.82 0.82 0.82 Mean kB

4. For a confined well with 1000gpd withdrawal the draw dawn from several observation well was given in table below. Calculate the following: (a) Using the Thiem formula, complete the table; (b) On semi-log graph paper, plot the final draw-down for each observation well with the log distance from the pumping well. Draw the best fitting line through the four points and obtain the rate of draw-down per log cycle Then obtain the transmissivity value using Thiem equation and finally compare with the values obtained in parts (a) and (b). r₁ (feet) r2(feet) s2(feet) kB(gpd/ft) $₁(feet) 3.57 295.0 98.0 7.34 7.34 3.57 2.35 7.34 98.0 2.6 2.6 98.0 295.0 2.6 295.0 705.0 705.0 705 2.35 3.57 2.35 0.82 0.82 0.82 Mean kB

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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You've been tasked with siting a new well in a confined aquifer that already has several operating wells. Drilling logs indicate that the aquifer is primarily sand and gravel with an average thickness of approximately 200 ft. You have specific capacity data from several drilling logs in the area (table 1), as well as data from a 48-hour single well pump test that was previously performed at well AG-1 several years ago (table 2). At the end of the single well test, simultaneous drawdown measurements were taken in several monitoring wells surrounding the pumping well (table 3). Estimate the transmissivity and storativity of the aquifer, along with a realistic range of uncertainty around those numbers. Table 1: Specific capacity data for nearby wells WELL BOREHOLE PUMPING STABILIZED DIAMETER DRAWDOWN 24 inches 16 inches 8 inches MW-1 AG-1 HH-1 Table 2: Single-well pump test on AG-1 at 500 gpm Time (min) Drawdown (ft) 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 120 180 240 300 360 540 720 1440…
4. For a confined well with 1000gpd withdrawal the draw dawn from several observation well are given in table below. Calculate the following: (a) Using the Thiem formula, complete the following table; (b) On semi-log graph paper, plot the final draw-down for each observation well with the log distance from the pumping well. Draw the best fitting line through the four points and obtain the rate of draw-down per log cycle. Then obtain the transmissivity value using Thiem equation; and (c) Compare with the values obtained in parts (a) and (b). 1 (feet) 98.0 2.6 2(feet) 295.0 98.0 S1(feet) 3.57 7.34 7.34 3.57 $2(feet) 2.35 3.57 2.35 0.82 KB(gpd/ft) 2.6 295.0 98.0 295.0 2.6 705.0 705.0 705 2.35 0.82 7.34 0.82 Mean kB
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A production well was discharged and tested through an atmospheric silencer at sea level (1 bar absolute) using a lip pipe with a diameter of 24.5 cm and a weir box with a 90 ° V-notch weir. The well was flowing at a wellhead pressure of 7 bar gauge and the measured lip pipe pressure and weir height were 3 bar gauge and 0.11 m, respectively. Calculate the discharge enthalpy and total mass flow of the well.
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