A triaxial sample was subjected to an ambient pressure of 200 kN/m2 and the pore pressure recorded was 50 kN/m2. In this state, the sample was found to be partially saturated. Then the cell pressure was raised to 300 kN/m2. The value of pore water pressure will be (Take B = 0.8) kPa.

Q: The dry bulk density (pb) of a sample is found to be 1.65 g/cm3. What is the porosity?

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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: What are the negative effects of excessive hardness in water? What is the unit of hardness  and why…

A: The excessive hardness in water can interfere with the action of detergents and soaps and it can…

Q: 2.28. A groundwater is being considered for use as a domestic supply. The water has a temperature…

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Q: For a permeability test with variable load, the following are given: soil sample = 380 mm; sample…

A: A variable permeability sample test data is given and it has been asked to determine area of piezo…

Q: The unconfined compression test sampler is : Split Spoon sampler   Sonotube sampler   Shelby tube…

A: Brief concept- Unconfined compression test- It is a type of triaxial shear test. In this test,…

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

A:

Q: In a dilatancy test on site water slowly showed up on the surface of the sample, this sample…

A: True

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.