A confined aquifer is recharged by a continuous supply of water from the certain source. The ave. Thickness of the aquifer was determined to be 25m and the ave width is 4 km. The hydraulic conductivity ( coefficient permeability ) of the aquifer was obtained at 40m per day and its porosity is 25% .The piezometer heads in two wells 1.325km apart are 65 m and 60m . from a common reference datum.From the given data, obtain: 1) The rate of flow through the aquifer in cubic meter per day; 2) Evaluate the seepage velocity in meters per day; 3) Estimate the time of travel, in days, from the head of the aquifer to a point 4km downstream.

A confined aquifer is recharged by a continuous supply of water from the certain source. The ave. Thickness of the aquifer was determined to be 25m and the ave width is 4 km. The hydraulic conductivity ( coefficient permeability ) of the aquifer was obtained at 40m per day and its porosity is 25% .The piezometer heads in two wells 1.325km apart are 65 m and 60m . from a common reference datum.From the given data, obtain: 1) The rate of flow through the aquifer in cubic meter per day; 2) Evaluate the seepage velocity in meters per day; 3) Estimate the time of travel, in days, from the head of the aquifer to a point 4km downstream.

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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A confined aquifer is recharged by a continuous supply of water from the certain source. The average thickness of the aquifer was determined to be 25 m and the average width is 4 km. The hydraulic conductivity of the aquifer was obtained at 40 m/day and its void ratio is 0.3333. The piezometer heads in two wells 1.325 km apart are 65 meters and 60 meters from a common reference datum. Determine the rate of flow in cubic meters per day.
2. A confined aquifer is recharged by a continuous supply of water from the certain source. The average thickness of the aquifer was determined to be 25 m and the average width is 4 km. The hydraulic conductivity of the aquifer was obtained at 40 m/day and its void ratio is 0.3333. The piezometer heads in two wells 1.325 km apart are 65 meters and 60 meters from a common reference datum. Determine the rate of flow in cubic meters per day. Determine: •compute the rate of flow through the aquifer in m3/day •compute the seepage velocity in m/day •compute the time of travel from the head of the aquifer to a point 8 km downstream in days
A confined aquifer has a source of recharge as shown in the figure. The hydraulic conductivityof the aquifer is 35 m/day with porosity of 25%. The piezometric head surface in the twoobservation wells 1000 m apart are at elevation 75 m and 65 m, respectively from the commondatum. The aquifer has an average thickness of 4 m and an average width of 4 km.a. Calculate the rate of flow of water through the aquifer in cubic meters per day.b. Calculate the seepage velocity in meters per day.c. Calculate the time of travel from the head of aquifer to a point 4 km downstream in days.
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An unconfined aquifer is known to be 32 m thick below the water table. A constant discharge of 2 cubic metres per minute is pumped out of the aquifer through a tubewell till the water level in the tubewell becomes steady. Two observation wells at distances of 15 m and 70 m from the tubewell show falls of 3 m and 0.7 m respectively from their static water levels. Find the permeability in mm/s of the aquifer.
An unconfined aquifer is known to be 32 m thick below the water table. A constant discharge of 2 cubic metres per minute is pumped out of the aquifer through a tubewell till the water level in the tubewell becomes steady. Two observation wells at distances of 15 m and 70 m from the tubewell show falls of 3 m and 0.7 m respectively from their static water levels. Find the permeability in mm/s of the aquifer. a.3.28 x 10^-1 b.4.68 x 10^-1 c.2.58 x 10^-1 d.1.18 x 10^-1
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