Direction: ChooseA- When both statements are true;B - When both statements are false;C- When the first statement is true and thesecond statement is false;D- When the first statement is false and thesecond statement is true.First Statement: The piezometric surface of anaquifer confined by an aquiclude is higher thanthat of an unconfined.Second Statement: Hydraulic conductivity is ameasure of permeability or impermeability of ageologic unit.OAB.D.

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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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Given: Permeability, k = 40 x 104 cm/s Saturated unit weight of the soil = 20 kN/m³ Other information shown in the Figure E3-3 Determine the following: (a) Quantity of Discharge (b) Total vertical stress at Points B and D (c) Pore-water pressure at Points B and D (d) Effective vertical stress at points B and D 20.0 m 6.5 m 5.0 m 10.5 m Water YAY Concrete Impervious Figure E3-3 1.0 m VAYAYAY 5.0 m
Hydraulic conductivity (K) in the vadose (unsaturated) zone is affected by of the following subsurface properties. Select all that apply. moisture content Fick's condition Zubov's condition Pore water pressure Darcy's condition Hysteresis wetting/drying stage Gregorian chant in e minor
9) A well is located in a confined aquifer near the intersection of a constant head and impervious boundary. a) Estimate the steady state drawdown in the well for Q=2 ft³ s, rw = 1 ft, distance from the well to stream= 300ft and distance from well to impervious boundary= 150 ft. T = 0.14ft²/s b) Estimate the steady state drawdown at point P located midway between the well and the steam. The angle between the stream and the impervious boundary is 90°
A confined aquifer of 15 m constant thickness is sandwiched between two aquicludes as shown in the figure (not drawn to scale) 55.2 m BT Peizometer P Reference Datum Aquiclude Piezometric Surface Aquiclude Peizometer Q L = 2500 m 34.1 m ונטוב SOM The heads indicated by two piezometers P and Q are 55.2 m and 34.1 m, respectively. The aquifer has a hydrau- lic conductivity of 80 m/day and its effective porosity is 0.25. If the distance between the piezometers is 2500 m, the time taken by the water to travel through the aquifer from piezometer location P to Q (in days, round off to 1 decimal place) is
Estimate the equivalent hydraulic conductivity for flow in the horizontal direction. Also calculate the ratio of kv(eq)/kH(eq). Suppose that k1 = 15 x10^-4 cm/s, k2= 5.0x10^-4 cm/s, k3= 3.0 x10^-4 cm/s, k4= 2.0 x10^-4 cm/s, H1= 1.0 m, H2 = 2.0 m, H3 =1.5 m, H4 =1.0m. kH(eq) = kV(eq)/kH(eq)=
Question 4.8 Consider a layered reservoir consisting of three alternating layers 1 m thick and 1 m long, with k,= 1000 mD, k, = 100 mD, and k,= 10 mD. a) What is the average permeability of this reservoir if the fluid is flowing parallel to the layering (k,)? b) What is the average permeability of this reservoir if the fluid is flowing perpendicular to the layering (k,)? c) What is the kJk,?
The pipe bend shown is in a horizontal plane. Oil with a specific gravity of 0.86 enters the reducing bend at section A with a velocity of 3.2 m/s and a pressure of 150 kPa. Neglecting head loss, determine (a) The velocity at section B, V3 (m/s) (b) The pressure at section B, ps (kPa) (c) FMx (N) de = 100 mm B da = 150 mm 30°
4.1 A line load of q = 60kN/m with a = 0 is placed on a ground surface as shown in Figure P4.1. Calculate the increase of pore water pressure at M immediately after application of the load for the cases given below. (a) z = 10m, x = 0m, v=0.5, A=0.45. (b) == 10m, x= 2m, v= 0.45, A=0.6. 2 m 4. G.W.T. Clay XI 1
Q3. SAE 30 oil (Sp. Gr. =0.833) with a dynamic viscosity 0.28 N.S/m? flows in a 4-cm-diameter pipe which is inclined with an angle 37°. For the pressure measurement shown, determine A. Whether the flow is up or down The flow rate in m'/h C. The shear stress and velocity 1 cm from the boundary Draw the shear stress and velocity profile with the section of the pipe. В. D. P-180 kPa P- sOokPa 15m 20m
Consider the pressurized horizontal pipe network shown below. Pipe 2 is arranged in parallel with Pipe 3. The characteristics of each pipe are summarized in the table. The flow of water at Node A is Q = 10 cfs and the pressure head at Node A is yA = 180 feet. The temperature of the water is 60° F. a) Determine the flow in cfs in Pipe 2. b) Determine the flow in cfs in Pipe 3. c) Determine the friction head loss hric in feet in Pipe 1. d) Determine the friction head loss hfic in feet in Pipe 2. e) Determine the friction head loss htric in feet in Pipe 3. f) Determine the friction head loss hfric in feet in Pipe 4. g) Determine the pressure head ys in feet at Node B. h) Determine the pressure head yc in feet at Node C. i) Determine the pressure head yo in feet at Node D. Flow Friction Pressure Diameter Length Pipe (inches) (feet) Friction (cfs) head Нead factor f Kpipe loss (feet) Node (feet) 1 16 500 0.012 10 A 180 12 1000 0.014 B 10 1000 0.015 16 500 0.020 10 D Pipe 2 Node Node Node…
Figure Q.3 shows a liquid reservoir that is density stratified. The top layer has thickness b and uni- form density pt. The middle layer has thickness d and a linearly varying density given by Pt (") (h - b) Pb - Pt P(h) = Pt+ d p(h) for (b Pt. Figure Q.3. Use the information provided above and in Figure Q.3 to derive the gauge pressure distribution for the liquid in the reservoir.
Soil layers are shown as the right figure. Given: H₁ = 2 m, k₁ = 10-4 cm/sec H₂ = 3 m, K₂ = 3.2 x 10-² cm/sec H₂ = 4 m, K₂ = 4.1 x 10-5 cm/sec Estimate the ratio of horizontal equivalent hydraulic conductivity and vertical equivalent hydraulic conductivity, i.e., k./k₂ T * H₂ H₂ a. 152 Ob. 270 O c. 140 O d. 225 k₁ k₂ k3

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