(400 gpm). 9.16. Determine the maximum steady-state pumping rate in lps (gpm) for a 305-mm (12-in) diameter well installed in an unconfined aquifer if the allowable drawdown at the well is limited to 8.0 m (26.2 ft). The aquifer has a saturated thickness of 12.0 m (39,4 and a hydraulic conductivity of 40 m/day (131.2 ft/day). The radius of influence for the well is 2,000 m (6,560 ft). 9.17. Determine the maximum steady-state pumping rate for the well in Problem 9.16 if the allowable drawdown at the well is limited to 6.0 m (19.7 ft). 9.18. Determine the drawdown at the well and 30 m (98.4 ft) from the well in Problem 9.16 du otota discharge of 18.9 lps (300 gpm).

(400 gpm). 9.16. Determine the maximum steady-state pumping rate in lps (gpm) for a 305-mm (12-in) diameter well installed in an unconfined aquifer if the allowable drawdown at the well is limited to 8.0 m (26.2 ft). The aquifer has a saturated thickness of 12.0 m (39,4 and a hydraulic conductivity of 40 m/day (131.2 ft/day). The radius of influence for the well is 2,000 m (6,560 ft). 9.17. Determine the maximum steady-state pumping rate for the well in Problem 9.16 if the allowable drawdown at the well is limited to 6.0 m (19.7 ft). 9.18. Determine the drawdown at the well and 30 m (98.4 ft) from the well in Problem 9.16 du otota discharge of 18.9 lps (300 gpm).

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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A 30cm diameter well fully penetrates an unconfined aquifer with saturated thickness ho=60m and hydraulic conductivity K-9x10-3 m/min, calculate the drawdown at point k and the drawdown at the pumping well, assume ro=120m near an impervious boundary. The well is being pumped at a constant rate of 1.5m³/min. Pw 30m k 50m 35m Impervious boudary
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Flow in Wells a) A 30-cm well completely penetrates an artesian aquifer. The length of the strainer* is 25 m. Determine the discharge from the well when the drawdown at the pumping well is 4.0 m. The coefficient of permeability of the aquifer is 45 m/day. Assume the radius of influence of the well is 350 m. *length of strainer = thickness of the aquifer b) A 30-cm well fully penetrates an unconfined aquifer of saturated depth 25 m. When a discharge of 2100 lpm was being pumped for a long time, observation wells at radial distances of 30 m and 90 m indicated drawdown of 5 and 4 m respectively. Estimate the coefficient of permeability and transmissibility of the aquifer. What is the drawdown at the pumping well? *lpm = liters per minute *h = H - s, where H = saturated depth
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