geo HW #4

geo HW #4 - hydraulic conductivity. Does this result seem...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Dan Aiello Geo. Eng. HW #4 1) A constant head hydraulic conductivity test has been conducted on a 110mm diameter, 270 mm tall fine sand specimen in a permeameter . The upper and lower reservoir elevations were 2010 mm and 1671 mm above the lab floor. The piezometers, whose tips are spaced 200 mm apart, had readings of 1809 and 1578 mm, and the graduated cylinder collected 910 ml of water in 25 min 15 seconds. Using the best available data compute the hydraulic conductivity. Does this result seem reasonable? Why or why not? k seems reasonable because it fits in the rage for fine sand
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2) A falling-head hydraulic conductivity test has been conducted on a clay specimen in a permeameter. The soil specimen was 97 mm in diameter and 20 mm tall. The stand pipe had an inside diameter of 6mm. The water level in the bath surrounding the specimen was 120 mm above the laboratory counter top and the water level in the stand pipe fell from 510 mm to 261mm in 46 hours and 35 mins. Using the best available data compute the
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: hydraulic conductivity. Does this result seem reasonable? Why or why not? k seems reasonable because it is within the range for clay 3) A labaoratory apparatus shown in fig 3 maintains a constant head in both the upper and lower reservoirs. The soil sample is silty sand with k= 5x10^-3 and w=18.5%. Assume a reasonable value for Gs, determine the time required for the plug of colored water to pass through the soil. 4) An unlined irrigation canal is aligned parallel to a river as shown if fig 4. The cross section is 4.25 miles. The soils are generally clays, but a 6 in thick sand seam is present as shown. Sand has a k=.09. Compute the water loss from the canal to the river. 5) Four piezometer tips are spaced at 100mm intervals, and the soil interfaces are exactly aligned with tips B and C. The total heads in piezometers A and D are 89.9 and 3.6, respectively. Compute the total heads in piezometers B and C....
View Full Document

This note was uploaded on 02/22/2012 for the course GEO 103 taught by Professor Staff during the Fall '08 term at Syracuse.

Page1 / 4

geo HW #4 - hydraulic conductivity. Does this result seem...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online