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 2.29 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.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

b. An aquifer with a potentiometric surface is 50 m thick and 500 m wide. Two observation wells are located 1400 m apart in the direction of flow. Head in the first well is 50m and in the second well is 42m. Hydraulic conductivity is 0.7 m/d. Effective porosity of the medium is 20%. Determine the total flow of the water through the aquifer. Also determine the actual groundwater velocity between the two wells.
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.
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.
Solve it ASAP
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 ?7??6?3/?2h?7??1? 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. Determine the coefficient of permeability (m/hr) Select the correct response: 2.15x10-5 0.215 0.597 5.97x10-5
6. In a tube well of 20cm diameter in a soil with coefficient of permeability of 4.15* 10 m/s, drawdown is 4m and aquifer is 30m thick. If radius of influence is 245m, what is the discharge in each well?
1. A sand sample of 35 cm² cross sectional area and 20 cm long was tested in a constant head permeameter. Under a head of 60 cm, the discharge was 120 mL in 6 min. The dry weight of sand used for the test was 1120 g, and G₁ = 2.68. Determine (a) the hydraulic conductivity in cm/sec, (b) the discharge velocity, and (c) the seepage velocity.
An unconfined aquifer is 100 feet thick was evaluated using a field pumping test. The depth to groundwater is 10 feet. At a distance of 1000 feet, the drawdown was 40 feet, and at a distance of 5000 feet it was 20 feet. Find the permeability of the aquifer assuming that a steady-state of 960 gal/minute during the test in ft/sec.
A confined aquifer has a source of recharge. The hydraulic conductivity of the aquifer is 40 m/day and its porosity is 0.25. The piezometric head in the two wells 1000m apart is 65 m and 60 m respectively from a common data. The average thickness of the aquifer is 25 m and the average width is 4 km. Compute the seepage velocity.
Seepage analysis..
A 2 m drawdown was observed in a confined aquifer. What would be the drawdown if the transmissitivity (T) equals 0.7 of the actual T. a) 3.86 m b) 0.35 m c) 2.86 m d) 1.40 m
A confined aquifer is recharged by a continuous supply of water from the certain source. The ave. Thickness of the aquifer was determined to be 25m and the ave width is 4 km. The hydraulic conductivity ( coefficient permeability ) of the aquifer was obtained at 40m per day and its porosity is 25% .The piezometer heads in two wells 1.325km apart are 65 m and 60m . from a common reference datum.From the given data, obtain: 1) The rate of flow through the aquifer in cubic meter per day; 2) Evaluate the seepage velocity in meters per day; 3) Estimate the time of travel, in days, from the head of the aquifer to a point 4km downstream.