In a falling permeameter, the sample used is 20 cm long having a cross-sectional area of 24 cm2. The sample of soil is made of three layers. The thickness of the first layer from the top is 8 cm and has a value of k1 = 2 x 10-4 cm/s, the second layer of thickness 6 cm has k2 = 5 x 10-4 cm/s and the bottom layer of thickness 4 cm has k3 = 7 x 10-4 cm/s. Assume the flow is taking perpendicular to the layers. Estimate the average hydraulic conductivity of soil in the vertical direction. a.3.12 x 10-4 cm/s b.5.69 x 10-4 cm/s c.2.35 x 10-4 cm/s

Q: A soil sample has solids with effective (D10) = 0.004 mm. The effective pore diameter is 30% of…

A: Given: A soil sample has solids with effective, D10=0.004 mm The effective pore diameter is 30 % of…

Q: Q9) The saturated clay sample put into the wax with unit density of 0.8gm/cm³ and its weight 8gm.…

A: Density of the waxγwax=0.8 gm/cm3 and mass of wax  Mwax=8 gmvolume of wax=mass density=80.8=10…

Q: The wet weight of a soil sample having a volume of 0.0016 ft' is 0.188 lb. After oven-drying, the…

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Q: Soil Mechanics An undisturbed sample of saturated clay has a volume of 16.5 cm3 and weighs 35.1 g.…

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Q: A sample of dry sand having a unit weight of 16.50 kN/m3 and a specific gravity of 2.7 is placed in…

A: Dry unit weight = 16.50KN/m3  Specific gravity = 2.7  Saturation after Rain Sr =0.40

Q: 3. The particle size distribution curve of a particular soil sample yielded the figured values.…

A: Step4:D60=0.24mmD30=0.16mmD!0=0.096mm

Q: A Saturated soil sample has a volume of 45 ??^3 at the liquid limit. If the soil has a liquid limit…

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Q: A soil with a volume of 163cm^3 is sampled from a field. It weighs 221g. Then, the sample was…

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Q: A soil sample has solids with effective (D10) = 0.004 mm. The effective pore diameter is 30% of…

A: Given- Effective size D10=0.004 mm, Pore diameter = 30% of effective size, Theoretical height of…

Q: Pressure (kN/m²)27 54 107 214 429 214 107 54 Void ratio1.243 1.217 1.144 1.068 0.994 1.001 1.012…

A: Thickness of sand = 10 mThickness of clay = 2.5 m Thickness of fill = 10 m

Q: In a falling head permeability test on a soil sample of length 1₁, the head of water in the stand…

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Q: A soil sample has a liquid limit of 80% and a plastic limit is 45%. The plasticity index is: a. 35%…

A: Given data : The value of plastic limit of soil sample=45% The value of liquid limit of soil…

Q: In a laboratory, researchers conducted an experiment on soil with 13.25% water content, compacting…

A: Note: As per Bartleby Guidelines, only first three subparts will be discussed in the solution. But…

Q: the ultimate consolidation ent (expressed in mm) of the clay

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Q: 8. The following data were obtained: Weight of wet soil = 70.5 g Weight of dry soil = 62.5 g Volume…

A: Given, Wwet = 70.5 gm Wdry = 62.5 gm

Q: A soil sample is subjected to triaxial test and the results are as follows: Angle of friction = 30°…

A: Given, Cohession of soil , C = 15kPa σ1= 500kPa θ = 30°

Q: Soil field density experiment was done by sand cone if you knew that the information below was done…

A: Objective: to Obtain the moisture content and field density  of a given sample Solution: Given:…

Q: A soil sample has solids with effective (D10) = 0.004 mm. The effective pore diameter is 30% of…

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Q: From the laboratory result of a sample taken from the field, the total volume of wet sample is 1 x…

A: V=10-3 m3 W=1.8kg G=2.6

Q: A sample of saturated clay had a volume of 97 cm3 and a mass of 0.202 kg. When completely dried the…

A: Shrinkage limt is :SL=MC-V1-V2Wdryρw

Q: A glass cylinder 5 cm internal diameter with a screen at the bottom was used as a falling head…

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Q: soil with a volume of 163cm^3 is sampled from a field. It weighs 221g. Then, the sample was…

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Q: A Saturated soil sample has a volume of 45 cm³3 at the liquid limit. If the soil has a liquid limit…

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Q: g) Weight of water in KN that must be added per m3 for a 90%-degree saturation h) Mass of water in…

A: Given Data: γb=1960 Kg/m3 γs=2700 kg/m3 Assuming γw=1000 kg/m3 Assuming specific gravity G= 2.7…

Q: In a proctor test, 1.8 kg of moist soil was filled in the mould (volume = 944 cc) after compaction.…

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Q: In a falling head permeability test on a soil sample of length 1₁, the head of water in the stand…

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Q: If a soil sample of volume =1 cm3 and actual density =2000 kg/m³, and bulk density = 1700 kg/m3, the…

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Q: Following are the results of a laboratory consolidation test on a soil sample: dry mass of soil =…

A: Given: Dry mass of soil, MS = 128 g Specific gravity, GS = 2.75 Area of sample, A = 30.68 cm2

Q: what is the pore volume of the sample?

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Q: Following are the results of a laboratory consolidation test on a soil sample: dry mass of soil =…

A: Given: Dry mass of soil, MS = 128 g Specific gravity, GS = 2.75 Area of sample, A = 30.68 cm2

Q: Undisturbed soil sample was collected from the field in steel Shelby tubes for laboratory…

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Field applications of hydraulic conductivity

Hydraulic conductivity is one of the hydraulic properties of soil defined as a measurement of the ability of a porous medium to permit water movement or fluid flow through it. It is denoted by the letter K. It is influenced by the density and viscosity of the fluid. It is also called permeability. Hydraulic conductivity is defined as the ratio of velocity to the hydraulic gradient. The different methods used to determine the hydraulic conductivity are laboratory methods (constant head permeability tests and falling head tests), in-situ field methods (pumping in and pumping out tests), small scale field tests (infiltration tests and slug tests), and indirect methods such as estimation from grain size, consolidation test data, and horizontal capillary test. The pedotransfer function (PTF) method is a specific empirical estimating approach employed in the soil sciences is also used to determine the hydraulic conductivity of the soil.