to have the following water retention characteristics: Water content at -10 kPa (field capacity) = 0.15 kg kg!, water content at -1500 kPa (wilting point) = 0.06 kg kg! The bulk density was found to be 1250 kg m Assume the density of water to be 1000 kg m 2.1 Calculate the plant available water capacity (PAWC), expressing your results in depth unit

to have the following water retention characteristics: Water content at -10 kPa (field capacity) = 0.15 kg kg!, water content at -1500 kPa (wilting point) = 0.06 kg kg! The bulk density was found to be 1250 kg m Assume the density of water to be 1000 kg m 2.1 Calculate the plant available water capacity (PAWC), expressing your results in depth unit

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...

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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
A 3 m thick soil has coefficient of permeability 3 x10^-7 m/s. A separate test porosity 40% and bulk unit weight 21 kN/m^3 at a moisture content of 31%. Determine the flow to maintain critical conditions? Assume unity unit area. a. 6.2 x10^-7 m^3/s/m^2 b. 1.0 x 10^-7 m^3/s/m^2 c.3.1 x 10^-7 m^3/s/m^2 d. 5.7 x 10^-7 m^3/s/m^2
The section size of a water pipe is (100cm Χ 100cm), three types of soils A, B, and C are placed in the pipe, and a fixed amount of water is injected into the top left tap to keep the water head difference between the left and right ends of the pipe 60cm. The three soil permeability coefficients are k_A = 0.05 cm/sec , K_B = 0.1 cm/sec, k_C = 0.001 cm/sec, please calculate the following values:(1) The fixed amount of water injected into the faucet on the upper left (cm3/hr)(2) What is the total water head consumed by each of the three soils of A, B, and C (cm)(3) The overall volumetric seepage force of water flowing through the three soils (kN/m3)
b) For a constant head permeability test on a sand, these values are given:Length of the specimen = 720 mmDiameter of the soil specimen = 210 mm2Head difference = 990 mmWater collected in 5.5 min = 635 cm3Void ratio of the soil = 0.54Hence, determine:i) Hydraulic conductivity of the soilii) Discharge velocityiii) Seepage velocity
GIVEN THE FOLLOWING FOR A FULLY SATURATED SOIL: n=0.28 and Gs = 2.5 FIND THE WATER CONTENT. USE yw = 9.81 KN/(m^3). Use soil Mechanics
Determine the seepage velocity, in cm/min, if the porosity of soil is 0.30.
GIVEN THE FOLLOWING FOR A SOIL SAMPLE: S=0.8 n=0.28 and Gs = 2.5 FIND THE MOIST UNIT WIEIGHT. USE yw = 9.81 KN/(m^3)
A layer soil has the following data: H1=3m K1=2x10^-2 cm/sH2=4m K2=3.2x10^-2 cm/sH3=6m K3=4.1x10^-2 cm/s a) Compute the equivalent coefficient of permeability in the vertical directionb) Compute the velocity of flow if h =4 m.
The figure shows water flowing through saturated soil in the hatched area. Calculate the elevation pressure and total heads at points A, B and C. If the coefficient of permeability of the soil in the hatched area is 5 cm/sec and the cross sectional area of the soil sample is 15m2 calculate the water flow rate through the soil.
For a given soil, derive the following relation by drawing the three-phase diagram: γt = Gs γw (1 − n) + n S γw
Field Permeability Testing:Calculate the permeability of the soil from a confined aquifer given the followingbore pumping test results Distance from pump well Drawdown Drawdown Observation well 1 10km 200mm Observation well 2 15km 25mm Depth of Aquifer 600mm Depth of Aquiclude 2200mm Flow from Pump 23 l/s
L = 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 Determine the Hydraulic conductivity and seepage velocity.