well is located 25 m away from a impervious boundary as shown in Figure Q4. The well diameter is 4 m and the drawdown at the well is 5 m. Hydraulic Conductivity is 2x10-4 m/s. If an observation well located at a distance of 50 m show a drawdown of 0.8 m calculate the drawdown

well is located 25 m away from a impervious boundary as shown in Figure Q4. The well diameter is 4 m and the drawdown at the well is 5 m. Hydraulic Conductivity is 2x10-4 m/s. If an observation well located at a distance of 50 m show a drawdown of 0.8 m calculate the drawdown

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.22P: Refer to Figure 7.24. The following data were collected during the field permeability measurement of...

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Concept explainers

Groundwater Flow

The term groundwater refers to the water which is found beneath the earth's surface. Pores present in the soil and rocks with fractures make a passage for rainwater to enter the earth's surface and deposit as groundwater. The flow nature and direction of groundwater under the earth's surface directly impacts the strength and compressibility of the soil, which reflects its ability to support structural loads.

Question

. A well is located 25 m away from a impervious boundary as shown in Figure Q4. The
well diameter is 4 m and the drawdown at the well is 5 m. Hydraulic Conductivity is
2x10-4 m/s. If an observation well located at a distance of 50 m show a drawdown of
0.8 m calculate the drawdown at the impervious boundary.

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Refer to Figure 7.24. The following data were collected during the field permeability measurement of a confined aquifer using a pumping test. Determine the hydraulic conductivity of the permeable layer. Use Eq. (7.49). Thickness of the aquifer, H = 4.5 m Piezometric level and radial distance of the first observation well: h1 = 2.9 m; r1 = 17.8 m Piezometric level and radial distance of the second observation well: h2 = 1.8 m; r2 = 8.1 m Rate of discharge from pumping, q = 0.5 m3/min
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