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A slug test was performed in a piezometer with a casing radius of 2.54 cm and a screen radius of 2.54 cm. A slug of 4,000 cm³ of water was injected, raising the water level by 197.3 cm. The well completely penetrated a confined stratum with a thickness of 2.3 m. The decline in head over time is shown in the table below. Using any method you choose, estimate the hydraulic conductivity of the aquifer. Elapsed time (seconds) 0 1 2 3 195@ 4 7 10 13 17 22 32 53 84 119 170 245 400 800 Head (cm) 197.3 185.4 178.6 173.6 167.7 158.8 147.0 147.0 140.0 129.2 118.4 99.6 74.0 51.3 35.5 23.3 15.2 8.7 4.3

A slug test was performed in a piezometer with a casing radius of 2.54 cm and a screen radius of 2.54 cm. A slug of 4,000 cm³ of water was injected, raising the water level by 197.3 cm. The well completely penetrated a confined stratum with a thickness of 2.3 m. The decline in head over time is shown in the table below. Using any method you choose, estimate the hydraulic conductivity of the aquifer. Elapsed time (seconds) 0 1 2 3 195@ 4 7 10 13 17 22 32 53 84 119 170 245 400 800 Head (cm) 197.3 185.4 178.6 173.6 167.7 158.8 147.0 147.0 140.0 129.2 118.4 99.6 74.0 51.3 35.5 23.3 15.2 8.7 4.3

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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### Slug Test in a Piezometer A slug test was performed in a piezometer with a casing radius of 2.54 cm and a screen radius of 2.54 cm. A slug of 4,000 cm³ of water was injected, raising the water level by 197.3 cm. The well completely penetrated a confined stratum with a thickness of 2.3 m. The decline in head over time is shown in the table below. Using any method you choose, estimate the hydraulic conductivity of the aquifer. #### Table: Decline in Water Level Over Time | Elapsed Time (seconds) | Head (cm) | |------------------------|-----------| | 0 | 197.3 | | 1 | 185.4 | | 2 | 178.6 | | 3 | 173.6 | | 4 | 167.7 | | 5 | 158.8 | | 7 | 147.0 | | 10 | 147.0 | | 13 | 140.0 | | 17 | 129.2 | | 22 | 118.4 | | 32 | 99.6 | | 53 | 74.0 | | 84 | 51.3 | | 119 | 35.5 | | 170 | 23.3 | | 245 | 15.2 | | 400 | 8.7 | | 800 | 4.3 | This data provides a basis for calculating the hydraulic conductivity of the aquifer by analyzing how quickly the head declines over time.
Transcribed Image Text:### Slug Test in a Piezometer A slug test was performed in a piezometer with a casing radius of 2.54 cm and a screen radius of 2.54 cm. A slug of 4,000 cm³ of water was injected, raising the water level by 197.3 cm. The well completely penetrated a confined stratum with a thickness of 2.3 m. The decline in head over time is shown in the table below. Using any method you choose, estimate the hydraulic conductivity of the aquifer. #### Table: Decline in Water Level Over Time | Elapsed Time (seconds) | Head (cm) | |------------------------|-----------| | 0 | 197.3 | | 1 | 185.4 | | 2 | 178.6 | | 3 | 173.6 | | 4 | 167.7 | | 5 | 158.8 | | 7 | 147.0 | | 10 | 147.0 | | 13 | 140.0 | | 17 | 129.2 | | 22 | 118.4 | | 32 | 99.6 | | 53 | 74.0 | | 84 | 51.3 | | 119 | 35.5 | | 170 | 23.3 | | 245 | 15.2 | | 400 | 8.7 | | 800 | 4.3 | This data provides a basis for calculating the hydraulic conductivity of the aquifer by analyzing how quickly the head declines over time.
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