Based on observations of the rate of travel between two observation wells of a tracer element having retardation factor of 1.0, it is determined that the average linear flow (also known as seepage veloci 0.80m/day when the hydraulic gradient is 0.0005. A sample of the aquifer is tested and found to have a porosity of 0.20. Estimate the hydraulic conductivity (K) in m/day. Relevant equations from the equation sheet: Velume of Veide Porosity (n) =Tatei Velume of Voids+selida Porosity Darcy's Law Velocity and Flow v is the Darcy velocity Qis flow rate (usually m'/s) Kis hydraulic conductivity (usually m/day) Q = KA dh

Based on observations of the rate of travel between two observation wells of a tracer element having retardation factor of 1.0, it is determined that the average linear flow (also known as seepage veloci 0.80m/day when the hydraulic gradient is 0.0005. A sample of the aquifer is tested and found to have a porosity of 0.20. Estimate the hydraulic conductivity (K) in m/day. Relevant equations from the equation sheet: Velume of Veide Porosity (n) =Tatei Velume of Voids+selida Porosity Darcy's Law Velocity and Flow v is the Darcy velocity Qis flow rate (usually m'/s) Kis hydraulic conductivity (usually m/day) Q = KA dh

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A vertical sand column of length 100 cm and cross section area of 150 cm² is allowing the water to flow downward. The head difference was found to be 110 cm. The soil has a hydraulic conductivity of 20 mld and void ratio was taken as 0.5. Calculate the (a) rate of flow, (b) the Darcy velocity and (c) the average velocity.
Q1) B) using the Bingham plastic model determine the pressure losses in the annulus for the following well: (4 Marks) Data Length of drill pipe= 9000 ft Drill pipe = OD/ID = 5 in /4.276 in Hole diameter = 8.5 in |Page Plastic viscosity = 25 cp Yield point = 20 Ibf/100ft2 Flow rate = 300 gpm Mud density = 10 ppg %3D
For the constant head permeability test apparatus shown, cross-sectional area A flow, distance / between stand 78.5 cm² perpendicular to the direction Flow is vertically downwards through the sample. When the pipes = 10.0 cm. head loss h between the two standpipes is 5 cm, the volume of water which flows through the sample is 100 cm³ per minute. (a) What is the hydraulic gradient through the sample? Area A (b) What is your estimate of the coefficient of permeability k in cm/sec? How much (c) The exit point of the water is maneuvered so that the head loss h is increased 10 cm. water (in cm³) will flow through the sample in 2 minutes?
A site consists of a homogenous dense silty sand layerof 8m thickness which is underlain by an imprevious stiff clau stratum. The initial water table was at 3m depth below the ground level. A pumping test was carrier out by pumping water at the rate of 0.7 m^3/min. Onservation wells were dug into the ground at 25m and 50m distances from the center line of the well. At steady state (i.e., when there was no change in water levels in the observation wells), the water levels in the two wells dropped by 500mm and 150mm, respectively. Determine the hydraulic conductivity of the clay sand layer.
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