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A well in an unconfined aquifer was pumped at a rate of 900 m³/day. Drawdown was measured in a fully penetrating observation well located 85 m away. The following data were obtained: Time Drawdown Time Drawdown (min) (m) (min) (m) 41 0.128 1.17 0.004 51 0.133 1.34 0.009 65 0.141 1.7 0.015 85 0.146 2.5 0.03 115 0.161 4 0.047 175 0.161 0.054 260 0.172 0.061 300 0.173 7.5 0.068 370 0.173 0.064 430 0.179

A well in an unconfined aquifer was pumped at a rate of 900 m³/day. Drawdown was measured in a fully penetrating observation well located 85 m away. The following data were obtained: Time Drawdown Time Drawdown (min) (m) (min) (m) 41 0.128 1.17 0.004 51 0.133 1.34 0.009 65 0.141 1.7 0.015 85 0.146 2.5 0.03 115 0.161 4 0.047 175 0.161 0.054 260 0.172 0.061 300 0.173 7.5 0.068 370 0.173 0.064 430 0.179

Structural Analysis
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 well in an unconfined aquifer was pumped at a rate of 900 m³/day. Drawdown was measured in a fully penetrating observation well located 85 m away. The following data were obtained: Time Drawdown Time Drawdown (min) (m) (min) (m) 41 0.128 1.17 0.004 51 0.133 1.34 0.009 65 0.141 1.7 0.015 85 0.146 2.5 0.03 115 0.161 4 0.047 175 0.161 0.054 260 0.172 6 0.061 300 0.173 7.5 0.068 370 0.173 0.064 430 0.179 14 0.09 485 0.183 18 0.098 665 0.182 21 0.103 1340 0.2 26 0.11 1490 0.203 31 0.115 1520 0.204 Find the transmissivity T, storativity S and specific yield Sy.
Transcribed Image Text:A well in an unconfined aquifer was pumped at a rate of 900 m³/day. Drawdown was measured in a fully penetrating observation well located 85 m away. The following data were obtained: Time Drawdown Time Drawdown (min) (m) (min) (m) 41 0.128 1.17 0.004 51 0.133 1.34 0.009 65 0.141 1.7 0.015 85 0.146 2.5 0.03 115 0.161 4 0.047 175 0.161 0.054 260 0.172 6 0.061 300 0.173 7.5 0.068 370 0.173 0.064 430 0.179 14 0.09 485 0.183 18 0.098 665 0.182 21 0.103 1340 0.2 26 0.11 1490 0.203 31 0.115 1520 0.204 Find the transmissivity T, storativity S and specific yield Sy.
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