A constant-head permeability test is performed where the hydraulic gradient is 0.75. The crosssectional area of the sample is 0.25 ft2. The quantity of water flowing through the sample is measured to be 0.004 ft3/minute. (a) What is the coefficient of permeability in feet per minute? (b) What is the coefficient of permeability in millimeters per second?

A constant-head permeability test is performed where the hydraulic gradient is 0.75. The crosssectional area of the sample is 0.25 ft2. The quantity of water flowing through the sample is measured to be 0.004 ft3/minute. (a) What is the coefficient of permeability in feet per minute? (b) What is the coefficient of permeability in millimeters per second?

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.7P

See similar textbooks

Similar questions

A cylindrical soil sample with length = 15cm and diameter = 4cm was taken from a site where a groundwater contamination piume was found. The sample was tested in the lab to determine its hydraulic conductivity. A hydraulic gradient of 0.05 was applied across the sample, and a flow rate of 0.025 cm³/sec was measured. Calculate the hydraulic conductivity of the soil sample using Darcy's law.
Question 2 * The permeameter in a permeability test setup involves a soil sample 200 mm diameter and a length of 30 mm. The height of water is kept constant at 400 mm. In a duration of 4 min, water was collected in the graduated flask having a volume of 420 cu. cm. Determine the following. Flow Rate o Hydraulic gradient o Hydraulic conductivity
A constant-head permeability test is performed in a laboratory where the soil sample is 25 cm in length and 6 cm2 in cross-section. The height of the water is maintained at 2 ft at the inflow end and 6 in. at the outlet end. The quantity of water flowing through the sample is 200 ml in 2 minutes. (a) Make a sketch of the described conditions. (b) What is the coefficient of permeability? ***Please include all the units and conversions.
Three soil samples in a permeameter overlie one another with their characteristics listed below. Layer Hydraulic Conductivity, ft/day Length of aquifer, ft 1 10 5 2 0.20 3 0.030 12 a. Determine the equivalent hydraulic conductivity, in ft/day, if the flow is perpendicular to the stratification. b. If a falling head test is used, calculate the time required, in seconds, for the head to drop from 65 to 54 ft. The cross-sectional area of the permeameter and the standpipe are 300 square feet and 30 square feet respectively.
A constant head test is performed using a permeameter in the laboratory. The graduated cylinder collects 892 cm3 of water in 112 seconds. The soil specimen diameter = 18 cm , th elevation of water in upper-most piezometer is 181 com , the elevation of water in lowest piezometer is 116.6 cm and the piezometer inlets are evenly spaced at 16.7 cm on center. Compute the hydraulic conductivity, k and choose the correct answer below based on that. O A. 2.1 x 10^-3 cm/second O B. 1.5 x 10^-2 cm/second O C. 2.91 x 10^-2 cm/second O D. 2 x 10^-2 cm/second QUESTION 10 Given: -Applied stress on a soil = 122 kPa %3D -Influence Factor = 0.4 Compute the change in stress at 10 m below the edge of 25 m dimeter oil tank and select the correct answer from below: O A. Change in stress = 44 kPa O B. Change in stress = 49 kPa O C. Change in stress = 40 kPa O D. Change in stress = 42 kPa %3D
A falling head hydraulic conductivity test is performed on a sample of soil. The stand pipe having a diameter of 0.20cm is observed and it takes 60 seconds for the water to drop by 50 cm from an initial hydraulic head of 90cm. The sample has a length of 20cm, and a diameter of 4cm. a.Find the coefficient of permeability (cm/sec) b.Solve for the hydraulic gradient c. Compute the rate of flow of water in the soil. (cm' /sec.) 0.20 cm 6 s TAND PIPE 50cm Acm 不 20am -: SOIL
For a falling head permeability test, the following are given. Length of specimen is 380 mm, area of specimen = 6.5 cm2, hydraulic conductivity of the soil specimen is 0.017 cm/min. If the test temperature is 30 degrees Celsius, compute the corrected coefficient of permeability in cm/sec. A 0.035 0.028 0.021 0.014 B.
A soil sample 10 cm in diameter is placed in a tube Im long. A constant supply of water is allowed to flow into one end of the soil at A and the outflow at B is collected by beaker. The average amount of water collected is 1 cm for every 10 seconds. Determine: a. Hydraulic gradient b. Flow rate c. Average velocity d. Seepage velocity, if e 0.6 e. Hydraulic conductivity 1 m 1 m 0.8 m Datum Table
8. A soil sample in a constant-head apparatus is 6 in diameter and 12 in long. The vertical distance from headwater to tailwater is 24 in. In a test run, 5 ft3 of water passe through the sample in 60 sec. Determine the coefficient of hydraulic conductivity.
A constant-head permeability test was conducted in the laboratory and the following are measured: Length of soil: 12 in. Cross sectional area of soil: 15 in.². If the value of k = 0.006 in./sec and a flow rate of 450 in.3/hr was maintained through the soil, what is the head difference, h, across the soil? 16.7 in. 23.1 in. 14.2 in. 9.5 in.
The permeameter in a perrneability test setup involves a soil sample 200 mm diameter and a length of 30 mm. The height of water is kept constant at 400 mm. In a duration of 4 min, water was collected in the graduated flask having a volume of 420 cu. cm. Determine the following. Flow Rate Hydraulic gradient Hydraulic conductivity
For a falling head permeability test, the following values are given: Length of specimen: 200 mm Area of specimen:1000 sq. mm Area of standpipe: 40 sq. mm Head difference at t= 0: 500 mm Head difference at t= 180 sec : 300 mm Determine the hydraulic conductivity (cm/sec)