= 370 mm A = 145 cm^2 h = 340 mm Water collected in 3 min Q = 580 cm^3 Void ratio of sand e= 0.66 Determine the Hydraulic conductivity and seepage velocity.
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- A sand sample of 35m cm^2 cross sectional area and 20cm long was tested in a constant head permeameter. Under a head of 60 cm, the discharge was 120 ml in 6min. The dry weight of sand used for the test was 1120 g, and Gs= 2.68 A. Determine the hydraulic conductivity in cm/sec. B.Determine the discharge velocity in cm/sec. C. Determine the seepage velocity in cm/sec.A sand sample of 35 sq. cm cross sectional area and 20 cm long was tested in a constant head permeameter. Under a head of 60 cm, the discharge was 120 ml in 6 min. The dry weight of sand used for the test was 1120 g, and Gs = 2.68 1. Determine the hydraulic conductivity in cm/sec. 2. Determine the discharge velocity in cm/sec 3. Determine the seepage velocity in cm/secCVE 331: Theoretical hydraulic conductivity calculation Problem 1: The hydraulic conductivity of a sandy sol is 7x10 cm/sec at void ratio 0.68. What is the hydraulic conductivity at void ratio 0.85 ? (o.re) A= 2,42e k2 ei Problem 2: The hydraulic conductivity of a clay soil is 121o* cm/sec at void ratio 0.56, and 3.1x10 cm/sec at void ratio 0.74. What is the hydraulic conductivity the soll at void ratio 0.65 ? e3 ki %3D - 3. 797 GRAIN SIZE DISTRIBUTION GRAPH. A- PROJECE
- Problem 3. A sand sample of 35 cm2 cross sectional area and 20 cm long was tested in a constant head permeameter. Under a head of 60 cm, the discharge was 120 ml in 6 min. The dry weight of sand used for the test was 1 120 g, and Gs = 2.68. Determine (a) the hydraulic conductivity in cm/sec, (b) the discharge velocity, and (c) the seepage velocity.1. For a constant head laboratory permeability test on a fine sand, the following values are given: L = 300 mm; D₁ = 200 mm; h = 400 mm; Vol = 420 m³; t = 4 min; e = 0.55. a. Compute the coefficient of permeability in cm/sec. b. Compute the discharge velocity in cm/sec. c. Compute the velocity. seepage 2. For a falling head permeability test, the following are given. Length of specimen is 380 mm, are of specimen - 6.5 cm², hydraulic conductivity of soil specimen is 0.175 cm/min. a. What should be the area of the stand pipe for the head to drop from 650 cm to 300 cm in 8 min?1. A sand sample of 35 cm² cross sectional area and 20 cm long was tested in a constant head permeameter. Under a head of 60 cm, the discharge was 120 mL in 6 min. The dry weight of sand used for the test was 1120 g, and G₁ = 2.68. Determine (a) the hydraulic conductivity in cm/sec, (b) the discharge velocity, and (c) the seepage velocity.
- ← Darcy' Law A sand sample of 35 m² cross sectional area and 20 cm long was tested in a constant head permeameter. Under a head of 60 km, the discharge was 120 ml in 6 min. The dry unit weight of sand used for the test was 1120 g. and GS = 2.68 Take Sw = 1 g/ cm³ The hydraulic conductivity (in cm/sec) is × 10-³ XThe actual velocity for flow in a soil deposit of porosity 0.33 is 1.39 mm/sec. The coefficient of hydraulic conductivity is 4.58 cm/s. Determine the coefficient of percolation. A 13.88 mm/s B 15.2 mm/s C 8.56 mm/s D 23 mm/sA sand sample of 35 cm2 cross sectional area and 20 cm long was tested in a constanthead permeameter. Under a head of 60 cm, the discharge was 120 mL in 6 min. The dryweight of sand used for the test was 1120 g, and Gs= 2.68. Determine (a) the hydraulic conductivity in cm/sec, (b) the discharge velocity, and (c) the seepage velocity
- A field sample of an aquifer is packed in a test cylinder. The cylinder has a length of 120 cm and a diameter of 12 cm. The field sample with a porosity of 0.24 is tested under a constant head difference with water at 10°C. If the estimated hydraulic conductivity of the sample is 40 m/day and the hydraulic gradient is 1.5, calculate the average flow velocity (pore velocity). Ply Sand column Datum plane O a. u = 166.63 m/d O b. u = 250.00 m/d O c.u = 200.00 m/d O d. u = 48.00 m/d(b) The results of a constant head permeability test for a fine sand having a diameter of 90 mm and a length of 160 mm are given as follow. Determine constant head difference water collected in 7 min void ratio of sand = 580 mm = 470 cm³ = 0.8 (i) Hydraulic conductivity in, k in (cm/sec). (ii) Seepage velocity.2. An aquifer has a hydraulic conductivity of 180 ft/day, and effective porosity of 33% and is under a hydraulic gradient of 0.0004. a) Compute the Darcy velocity (also called Darcy flux). b) Compute the actual velocity (also known as the average linear velocity). c) The water temperature was 14 Degree C, and the mean pore diameter was 0.30 mm. d) Was it permissible to use Darcy's law under these circumstances? e) What is the reason for your answer?