Solve the quetionno.2 only in full details. Question No. 1An excavation is proposed for a square arca near the bend of a river as shown in Fig. P4.8. It is expectedthat the flow of water into the excavation will come through the silt layer. Pumping tests reveal an averagehorizontal bydraulic conductivity of 5.2 x 10 cm/s in the silt layer. The excavation has to be kept dry.Determine the flow (q) into the excavation.RiverExcavationPlan1.2SlapeExcavationSilt21 mCross section a-a8 mNot to scaleQuestion No. 2The highway embankment from Noscut to Windsor Forest, described in the sample practical situation, is 10km long. The average cross section of the embankment is shown in Fig. P3.22a. The gradation curves forthe soils at the two borrow pits are shown in Fig. P3.22b. Pit 1 is located 5 km from the start of theembankment while pit 2 is 3 km away. Estimated costs for various earthmoving operations are shown in thetable below. Compare the cost and check which option is cheaper?CostOperationPit 1Pit 2Purchase and load borrow pit material at site, haul 2 km$10/m3$12/m3round trip, and spread with 200 HP dozer$0.50/m3$102/m$10/m$0.55/m3Extra mileage charge for each kmCompaction$1.26Miscellaneous$0.85/m3

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Answered: Solve the quetionno.2 only in full…

Engineering

Civil Engineering

Solve the quetionno.2 only in full details.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.15P

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Question No. 1 An excavation is proposed for a square arca near the bend of a river as shown in Fig. P4.8. It is expected that the flow of water into the excavation will come through the silt layer. Pumping tests reveal an average horizontal bydraulic conductivity of 5.2 x 10 cm/s in the silt layer. The excavation has to be kept dry. Determine the flow (q) into the excavation. River Excavation Plan 1.2 Slape Excavation Silt 21 m Cross section a-a 8 m Not to scale Question No. 2 The highway embankment from Noscut to Windsor Forest, described in the sample practical situation, is 10 km long. The average cross section of the embankment is shown in Fig. P3.22a. The gradation curves for the soils at the two borrow pits are shown in Fig. P3.22b. Pit 1 is located 5 km from the start of the embankment while pit 2 is 3 km away. Estimated costs for various earthmoving operations are shown in the table below. Compare the cost and check which option is cheaper? Cost Operation Pit 1 Pit 2 Purchase…
A permeability pumping test was carried out in a confined aquifer with the piezometric level before pumping of 2.18m below the ground surface. The aquiclude has a thickness of 5.7m measured from the ground surface and confined aquifer is 7.6m deep until it reaches the aquiclude at the bottom. At a steady state pumping rate of 15.6 m³ /hr the drawdown in the observation wells were respectively equal to 1.62m and 0.47m. The distances of the observation wells from the center of the test well were 15m and 32m respectively. The radius of the test well is 1m. 14. Determine the coefficient of permeability (m/hr) 0.215 b. 0.597 2.15x10-5 d. 5.97 x10-5 а. С. 15. Determine the transmisibity of the impermeable (m²/hr) a. 1.636 b. 4.544 С. 0.00016 d. 0.00045 16. Determine the drawdown in the test well (m) а. 5.730 b. 3.765 C. 4.124 d. 4.364
A permeability pumping test was carried out in a confined aquifer with the piezometric level before pumping of 2.18m below the ground surface. The aquiclude has a thickness of 5.7m measured from the ground surface and confined aquifer is 7.6m deep until it reaches the aquiclude at the bottom. At a steady state pumping rate of 15.6 m³ /hr the drawdown in the observation wells were respectively equal to 1.62m and 0.47m. The distances of the observation wells from the center of the test well were 15m and 32m respectively. The radius of the test well is 1m. 14. Determine the coefficient of permeability (m/hr) b. 0.597 15. Determine the transmisibity of the impermeable (m²/hr) 0.215 2.15x10-5 d. 5.97 x10-5 a. C. а. 1.636 b. 4.544 C. 0.00016 d. 0.00045 16. Determine the drawdown in the test well (m) a. 5.730 b. 3.765 C. 4.124 d. 4.364
nib mSto llsw art mai Q-6: Water flows in a confined aquifer from a fully penetrating river with a piezometric head of 12 m toward a river with a piezometric head of 10 m located 400 away. If the aquifer hydraulic conductivity and effective porosity are 3 m/day and 0.15 respectively, estimate the seepage velocity in the aquifer. Determine the drawdown and piezometric head 150 m from an upstream river.
49. A pumping test was made in a sand layer extending to a depth of 16m. The initial groundwater table was located 2m below the ground surface. Observation wells were sighted at distances 4m and 9.5m from the pumping well. Using a discharge of 0.4 cubic meters per hour, a steady level is attained at the pumping well. The measured drawdowns at the two observation wells are 2m and 0.25m respectively. Determine the coefficient of permeability of the soil.
13. A 300mm diameter test well penetrates 27m below static water table. After 24 hours of pumping at 6.9liters/second. The water level in an observation well at a distance of 95m from the test well is lowered 0.5m and the other observation well at a distance of 35m from the test well, the drawdown is 1.1m. Determine the coefficient of permeability of the aquifer in m/day 60.27 b. 6.03 e. 70.27 f. 7.03 а.
Problem # 2. A permeability pumping test was carried out in a confined aquifer with the piezometric level before pumping is 2.18m below the ground surface. The aquiclude(impermeable layer) has a thickness of 5.7m. measured from the ground surface and the confined aquifer is 7.6m deep until it reaches the aquiclude(impermeable layer) at the bottom. At a steady pumping rate of 15.6 m3/hour the drawdown in the observation wells were respectively equal to 1.62 m. and 0.47 m. The distances of the observation wells from the center of the test well were 15m. And 32m. respectively. a. Compute the depth of water at the farthest observation well. b. Compute the coefficient of permeability. Compute the transmissibility of the impermeable layer. 32 e15 Piczometric level beofre Draw down 0.47 5.7 m Impermenbie layer (iquicde) Olervaion wells aqifer. H=1.6 m Impermeaple layer (aquicide)
Please answer with complete solution and Fbd. A field sample of an unconfined aquifer is packed in a test cylinder. The length and diameter of the cylinder are 60cm and 8cm, respectively. The field sample is tested for a period of 2min under a constant head difference of 18.5 cm. As a result, 50cm3 of water is collected at the outlet. Determine the hydraulic conductivity of the aquifer sample.
A permeability pumping test was carried out in a confined aquifer with the piezometric level before pumping is 2.18 m. below the ground surface. The aquiclude (impermeable layer) has a thickness of 5.7m. measured from the ground surface and the confined aquifer is 7.6 m. deep until it reaches the aquiclude (impermeable layer) at the bottom. At a steady pumping rate of 15.6 m3/hour the drawdown in the observation wells were respectively equal to 1.62 m. and 0.47 m. The distances of the observation wells from the center of the test well were 15 m. and 32 m. respectively. 1.Compute the depth of water at the farthest observation well. 2. Compute the coefficient of permeability. 3. Compute the transmissibility of the impermeable layer.
A permeability pumping test was carried out in a confined aquifer with the piezometric level before pumping is 2.29 m. below the ground surface. The aquiclude (impermeable layer) has a thickness of 5.76 m. measured from the ground surface and the confined aquifer is 7.3 m. deep until it reaches the aquiclude (impermeable layer) at the bottom. At a steady pumping rate of 15.0 m³/hour the drawdown in the observation wells. were respectively equal to 1.68 m. and 0.44 m. The distances of the observation wells from the center of the test well were 15 m. and 32 m. respectively. Compute the depth of water at the farthest observation well.
A permeability pumping test was carried out in a confined aquifer with the piezometric level before pumping is 2.24 m. below the ground surface. The aquiclude (impermeable layer) has a thickness of 6.00 m. measured from the ground surface and the confined aquifer is 7.3 m. deep until it reaches the aquiclude (impermeable layer) at the bottom. At a steady pumping rate of 16.2 m³/hour the drawdown in the observation wells. were respectively equal to 1.65 m. and 0.44 m. The distances of the observation wells from the center of the test well were 17 m. and 30 m. respectively. Compute the coefficient of permeability in mm/sec. Use 4 decimal places.
A permeability pumping test was carried out in a confined aquifer with the piezometric level before pumping is 2.17 m. below the ground surface. The aquiclude (impermeable layer) has a thickness of 5.59 m. measured from the ground surface and the confined aquifer is 7.6 m. deep until it reaches the aquiclude (impermeable layer) at the bottom. At a steady pumping rate of 15.1 m³/hour the drawdown in the observation wells. were respectively equal to 1.65 m. and 0.47 m. The distances of the observation wells from the center of the test well were 16 m. and 30 m. respectively. Compute the depth of water at the farthest observation well. Compute the transmissibility of the impermeable layer in cm²/sec.