4. Which of the following nearly gives the transmissibility of the soil when the water table is at the ground  surface? a. 12.752 sqm/day  b. 14.034 sqm/day  c. 16.664 sqm/day  d. 14.034 sqm/day 5. If the void ratio is 0.60 and the hydraulic gradient is 0.0018, which of the following most nearly gives the  interstitial velocity of water moving through the soil?  a. 0.0217 cm/hr  b. 0.0104cm/hr  c. 0.0374 cm/hr  d. 0.0217 cm/hr

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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.