Given: velocity of flow = 0.0375 m/s coefficient =0.05 m/s porosity p =48% slope S = 3/4 Given the coefficient =0.05 m/s and porosity p =48%, find the transmissibility (T) in m/s per unit m, if the aquifer width is 1.2 m.

Given: velocity of flow = 0.0375 m/s coefficient =0.05 m/s porosity p =48% slope S = 3/4 Given the coefficient =0.05 m/s and porosity p =48%, find the transmissibility (T) in m/s per unit m, if the aquifer width is 1.2 m.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.22P: Refer to Figure 7.24. The following data were collected during the field permeability measurement of...

See similar textbooks

Related questions

Q: a) A confined stratified aquifer has a total thickness of 16 m and is made up of four layers. The…

Q: A loam layer having the cross-section area as shown in the figure has been determined to exist for a…

Q: Q1.An aquifer has following different formations, their thickness and Hydraulic conductivity are…

A: Hydraulic Conductivity can be defined as the velocity of flow which would occur under unit hydraulic…

Q: Q2: Available field data indicate that the permeability for the clay is varies with depth. For layer…

A: Equivalent permeability for flow parallel kx=kx1H1+kx2H2+kx3H3H…

Q: A layered soil is depicted in the following figure. Make reasonable assumptions on the hydraulic…

A: Given :- A layered soil is depicted Reasonable assumptions on the hydraulic conductivity can be…

Q: is pumped out at a rate of 540 liters per minute when steady state conditions are reached. Two…

Q: An impervious layer underlies 4 layers of permeable soil. The thickness and the coefficient of…

Q: A confined aquifer (permeable soil) is shown. This aquifer has a source of recharge located as…

A: The hydraulic conductivity of aquifer, K = 40m/day. The porosity = 0.25 The length between two…

Q: A7 cm long poorly graded sand (k-0.05 cm/s) is placed next to a 33 cm long sandy silt (k=0.005…

Q: An aquifer has three different formations. Formation A has a thickness of 30 ft and a hydraulic…

A: The given data is: A=30 ft B=15 ft C=22 ft KA=7 ft/day KB=78 ft/day KC=17 ft/day

Q: = 370 mm A = 145 cm^2 h = 340 mm Water collected in 3 min Q = 580 cm^3 Void ratio of sand e= 0.66…

Q: (iii) The saturated unit weight of the soil in a permeability test (Figure 1 below) is 21 kN/m³.…

Q: A confined aquifer is 6 m thick and the coefficient of permeability in the soil is 2m3/day-m2. Two…

Q: SITUATION: A 3-layer soil has the following properties from top to bottom: Estimate the rate of flow…

Q: The section through part of a cofferdam is shown in Figure 2.25, the coefficient of permeability of…

A: Draw the flow net.

Q: Q4 (a) A confined stratified aquifer has a total thickness of 22 m and is made up of three layers.…

Q: From the figure shown, the thickness of permeable layer is 1.1m making an angle of 14 degrees with…

Q: Solve for the ratio of equivalent hydraulic conductivity with the following given: h1 = 2 m h2 = 2.5…

Q: Concrete dam H₂ H₂ Sandy layer Impervious rock L Figure 7.30 Given: upstream water level, H₂ = 16 m;…

Q: A canal is cut into a soil with a stratigraphy shown in Figure A. Assuming flow takes place…

Q: unconfined aquifer underlies confined aquifer figure. An a shown in the a. Compute coefficient of…

A: To determine: equivalent coefficient of permeability in horizontal direction hydraulic gradient…

Q: With the measurements in the following table, calculate the soil moisture flux q (cm/day) between…

A: The total head will be: Suction head+ gravity head ψ=h-z

Q: Problem 2.2 The section through part of a cofferdam is shown in Figure. The coefficient of…

A: Given data: Permeability through the soil (k) = 2 x 10-6 m/s Flow net of the given problem:

Q: An unconfined aquifer is known to be 32 m thick below the water table. A constant discharge of 2…

Q: Water flows through a fully confined sand aquifer with a piezometric head gradient of 0.025. (a) If…

A: Given head gradient = hydraulic gradient i=0.025and hydraulic conductivity K=1.72 m/dayporosity…

Q: b. An aquifer with a potentiometric surface is 50 m thick and 500 m wide. Two observation wells are…

A: Calculate total flow of water and velocity between two wells

Q: Problem 3 A sand layer of the cross-sectional area shown in the figure has been determined to exist…

Q: From the figure shows an unconfined non homogeneous aquifer between two water bodies at depth of 50…

A: Given data:- Depth of water bodies, h1 = 50 m h2 = 45 m Diagram is given;

Q: Problem #1 Saturated Flow Water flows through three confined aquifers in series as shown below. For…

A: It is series' connection so we know K equivalent

Q: A aquifer of an medium to coarse grained sand aquifer. It is 12.19 thick and 1.61 km wide. This…

A: Length of aquifer=1.524m Hydraulic gradient=I=h/L

Q: Q 1 .An aquifer has following different formations, their thickness and Hydraulic conductivity are…

Q: Determine the aquifer characteristics S and T assuming that Eq. (4.28) is valid.

Q: With the measurements in the following table, calculate the soil moisture flux q (cm/day) between K…

A: Given, Z1=0.5 mZ2=0.8 m Hydraulic conductivityK=240-ψ-2.3

Q: A well is constructed to pump water from a confined aquifer. Two observation wells are constructed…

Q: A confined aquifer has hydraulic conductivity of the aquifer, K =50 m/day and 0.2 of porosity. The…

A: Given: Hydraulic Conductivity K = 50m/day Porosity = 0.2 Piezometeric head of two wells = 55m and…

Q: Water flows through the permeable layer as shown in the figure. Given: H1 = 3.5 ft, h = 4.6ft, S =…

Q: the cross section of a levee, shown below, which is 650 m long and is underlain by a 2.5-m-thick…

A: It is required to determine the hydraulic gradient of the sand Here is the change in height, and L…

Q: Refer to Problem 8.4. Using the flow net drawn, calculate the hydraulic uplift force at the base of…

A: Given information:

Q: 7.5 A pervious soil layer is sandwiched between two impervious layers as shown in Figure 7.31. Find…

A: Given: Coefficient of permeability Head difference Length of flow field To find: Rate of flow…

Q: Problem 2.2 The section through part of a cofferdam is shown in Figure. The coefficient of…

Q: 5. From the figure shows an unconfined non homogeneous aquifer between two water bodies at depth of…

A: Given data k1=20m/sec k2=30m/sec

Q: Problem 1. An unconfined aquifer consists of three horizontal layers, each individually isotropic.…

A: H1=10m H2=4.4m H3=6.2m

Q: having hydraulic conductivity of 2.0 cm/sec. The middle layer consists of the fine sand of thickness…

A: If the flow is along the strata…

Q: Given: r1 = 30 m h = 13.6 m r2 = 10 m h1 = 17.6 m H = 20 m…

Q: Q2: Available field data indicate that the permeability for the clay is varies with depth. For layer…

A: equivalent permeability for flow parallel to the clay…

Q: A sand deposit of 12 m thick overlies a clay layer. The water table is 3 m below the ground surface.…

Q: X = 4 km If aquifer hydraulic gradient, hydraulic conductivity and effective porosity are found to…

A: its influence can be calculated by using seepage velocity

Q: a. For Figure 2 below, calculate the effective hydraulic conductivity for flow parallel and…

Q: 7.10 Figure 7.32 shows the cross section of a levee which is 650 m long and is underlain by a…

A: From this diagram we can say the difference of head (water level) ΔH = (175 -158) = 17 m across…

Q: A 3 m thick soil has coefficient of permeability 3 x10^-7 m/s. A separate test porosity 40% and bulk…

A: Flow to maintain critical conditions:

Concept explainers

Principles of Seepage

In hydrology, when water flows down in a pore or crack of unsaturated soil due to gravity, the deep layer of soil is called seepage. It is the slow movement of water in the soil layer. Seepage is mainly found near hydraulic structures and is responsible for the stability of earthen-type hydraulic structures.

Question

Given:

velocity of flow = 0.0375 m/s

coefficient =0.05 m/s

porosity p =48%

slope S = 3/4

Given the coefficient =0.05 m/s and porosity p =48%, find the transmissibility (T) in m/s per unit m, if the aquifer width is 1.2 m.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

theory

VIEW

calculation

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

From the figure shown, the thickness of permeable layer is 1.1m making an angle of 14 degrees with the horizontal. K= 4.87x10^-12 cm/sec. If the vertical thickness depth of the aquifer at point of the first piezometer (left) is 1.5m and the other point at second piezometer is 1.1m, determine the area of flow. h=1.4 m Direction impervious layer of seepage 3 m 14 1.1 m impervious layer 14 -36 m-
Given: r1 = 30 m h = 13.6 m r2 = 10 m h1 = 17.6 m H = 20 m h2 = 16.3 m t = 15 m d = 0.6 m ø Q = 13 L/s a.)Find the permeability of the aquifer in m/s. b.)Compute for the transmissivity of the impermeable layer in m2/s.
From the figure shown, an unconfined non homogenous aquifer between two water bodies at a depth of t1 = 96 m and t2 = 75 m respectively. Take K1 = 36 m/s, K2 = 48 m/s, H1 = 1470 m and H2 = 1230 m. K, K2 t2 H1 H2 a. Compute the average coefficient of permeability of the aquifer in m/s. (2 DECIMAL PLACES) b. Compute the rate of flow in m^3/s. (2 DECIMAL PLACES) c. Compute the time in seconds required for the water to pass through the soil if it has a void ratio of 0.36. (2 DECIMAL PLACES)
Situation 2: 4. 5. For the given figure, r₁ = 30 m r₂ = 10 m H = 20 m t = 15 m Q = 13 L/s h = 13.6 m h₁ = 17.6 m h₂ = 16.3 m d = 0.6 mø draw down H t d ₂1 C Find the permeability of the aquifer in m/s. Compute for the transmissivity of the impermeable layer in m²/s. h₂ 5 h₁ -observation wells -impermeable Confined layer Aquifer
From the figure shown, the thickness of permeable layer is 1.1m making an angle of 14 degrees with the horizontal. K= 4.87x10^-12 cm/sec. If the vertical thickness depth of the aquifer at point of the first piezometer (left) is 1.5m and the other point at second piezometer is 1.1m, determine the seepage velocity. h=1.4 m Direction of seepage impervious layer 3 m 14 1.1 m impervious layer 14 -36 m-
2. A confined aquifer is recharged by a continuous supply of water from the certain source. The average thickness of the aquifer was determined to be 25 m and the average width is 4 km. The hydraulic conductivity of the aquifer was obtained at 40 m/day and its void ratio is 0.3333. The piezometer heads in two wells 1.325 km apart are 65 meters and 60 meters from a common reference datum. Determine the rate of flow in cubic meters per day. Determine: •compute the rate of flow through the aquifer in m3/day •compute the seepage velocity in m/day •compute the time of travel from the head of the aquifer to a point 8 km downstream in days
For the given soil profile as shown. k, - 2.3 x 10 cm's k, = 8x 10° cm's 6 = 5.7 x 10 cms, k, = 25.5 x 10 cm/s 10 m 2 m 10m A, - 9.2 x 10 cmis k, = 27 x 10 cm's 1) Determine the equivalent hydraulic conductivity in x-direction in x10^-3 cm/s 2) Determine the equivalent hydraulic conductivity in z-direction in x10^-6 cm/s 3) Calculate the flow in x-direction per meter if the hydraulic gradient is 0.4. Expressed your answer in x10^-3 m^3/s.
5. From the figure shows an unconfined non homogeneous aquifer between two water bodies at depth of 50 m and 45 m. respectively. Compute the average coefficient of permeability of the aquifer and the rate of flow. K2= 30 m/sec K1= 20 m/sec 50 m 45 m 1000 m 800 m
Refer to Figure 7.24. The following data were collected during the field permeability measurement of a confined aquifer using a pumping test. Determine the hydraulic conductivity of the permeable layer. Use Eq. (7.49). Thickness of the aquifer, H = 4.5 m Piezometric level and radial distance of the first observation well: h1 = 2.9 m; r1 = 17.8 m Piezometric level and radial distance of the second observation well: h2 = 1.8 m; r2 = 8.1 m Rate of discharge from pumping, q = 0.5 m3/min
(Situation 3) Determine the equivalent hydraulic conductivity of the soil strata given in the figure considering direction of flow of water parallel and perpendicular to the layers. k = 2.3 x 102 cm/s k, = 8 x 102 cm/s k, = 5.7 x 10 cm/s, k, = 25.5 x 104 cm/s 10 m 2 m! = 9.2 x 10 cm/s k, = 27 x 107 cm/s 10 m %3!
For the given soil profile as shown. k = 2.3 x 102 cm/s k = 8 x 102 cm/s k. 5.7 x 10 cm/s, k, = 25.5 x 10 cm/s 10 m 2m k = 9.2 x 10 cm/s k. = 27 x 10- cm/s 10 m 1) Determine the equivalent hydraulic conductivity in x-direction in x10^-3 cm/s 2) Determine the equivalent hydraulic conductivity in z-direction in x10^-6 cm/s 3) Calculate the flow in x-direction per meter if the hydraulic gradient is 0.4. Expressed your answer in x10^-3 m^3/s.
A confined aquifer has hydraulic conductivity of the aquifer, K =50 m/day and 0.2 of porosity. The piezometric head in two wells are 55 m and 50 m, respectively, which 1000 m apart to each other. The average thickness and width of the aquifer are 25 m and 5 km, respectively. Estimate (i) The flowrate through the aquifer. Based on the result, describe the type of layer as shown in TABLE Q5(a) in terms of storability effect. (ii) Time of travel from the head of the aquifer to downstream of 3.5 km by assuming no dispersion or diffusion along the aquifer. Discuss on what would happen if there are dispersion or diffusion occur along the aquifer due to pumping activity