Consider two strata of the same soil material that lie between two channels. The first stratum is confined and the second one is unconfined, and the water surface elevations in the channels are 24 and 16 m above the bottom of the unconfined aquifer. What should be the thickness of the confined aquifer for which 1) the discharge through both strata is equal
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- A confined aquifer is 6 m thick and the coefficient of permeability in the soil is 2m/day-m2. Two wells tapped on the aquifer are 100 m apart, and the difference in the water elevation in the wells is 3.0 m. The effective porosity is 0.38. What are the average (Darcy) velocity through the aquifer and the flow rate per meter width of aquifer? Darcy velocity is 0.06 m/day and the flow rate is 0.36 cubic meter per day per meter width. Darcy velocity is 0.16 m/day and the flow rate is 0.06 cubic meter per day per meter width. Darcy velocity is 0.16 m/day and the flow rate is 0.36 cubic meter per day per meter width. Darcy velocity is 0.06 m/day and the flow rate is 0.16 cubic meter per day per meter width. The best answer is not among the choices.Problem 8 A permeability pumping test was carried out through a confined aquifer. The aquiclude (impermeable layer) above confined aquifer has a thickness of 6.8 m from the ground surface. The water table before pumping was 2.3 m below the ground surface. The well penetrates through a confined aquifer which is 5.8 m thick. Below the confined aquifer is a solid bedrock (aquiclude). At a steady pumping rate of 26.8 m³/hr, drawdowns on two observation wells located 15 m and 30 m from the main well are 1.4 m and 0.42 m, respectively. Determine the pumping rate in GPD. 169915 174563 154256 a. A. C. 166325 b. Determine the coefficient of permeability in m/day. A. 5.89 ن ن نے C. 4.25 C. B. D. A. C. 901.4 B. D. the Determine coefficient of transmissibility in liters per hr per vertical meter of the saturated aquifer. 1056.2 B. D. 3.24 3.73 ENGR. CHRYSLER G. DUASO, CE. RMP 854.7 963.4Calculate the water discharge through two aquifers that have similar dimensions (30 m thick, 1.5 km wide, 1m/km potentiometric surface). Aquifer 1 is gravelly with a permeability of 0.042 m/s while Aquifer 2 is mostly silty sandstone with a permeability of 4.2x104 m/s. Permeability (m/sec) Aquifer 1 Ah/Al Cross sectional Area (m²) Water Discharge Aquifer 2
- 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 5.97x10-5An aquifer has 20m thickness and the rate at which water transfer through a unit width is 0.12 sq.m per second and a void ratio of 0.91. Ground water is flowing through this aquifer with a hydraulic gradient of 0.0065. a. Compute the Seepage velocity.A permeability pumping test was carried out in unconfined aquifer with the piezometric level before pumping is 2.18m below the ground surface. The first permeable layer has a thickness of 5.7m measured from the ground surface and the unconfined aquifer is 7.0m deep until reaches the aquiclude at the bottom. At a steady pumping rate of 15.6m^3/hr the drawdown in the observation wells were respectively equal to 1.62m and 0.47m. The distance of the observation wells from the center of the test well were 15m and 32m respectively. If the hydraulic gradient is 0.0092 determine the seepage velocity at 0.25 void ratio?
- A permeability pumping test was carried out in unconfined aquifer with the piezometric level before pumping is 2.18m below the ground surface. The first permeable layer has a thickness of 5.7m measured from the ground surface and the unconfined aquifer is 7.0m deep until reaches the aquiclude at the bottom. At a steady pumping rate of 15.6m^3/hr the drawdown in the observation wells were respectively equal to 1.62m and 0.47m. The distance of the observation wells from the center of the test well were 15m and 32m respectively. Compute the Transmissibility?A permeability pumping test was carried out in unconfined aquifer with the piezometric level before pumping is 2.18m below the ground surface. The first permeable layer has a thickness of 5.7m measured from the ground surface and the unconfined aquifer is 7.0m deep until reaches the aquiclude at the bottom. At a steady pumping rate of 15.6m^3/hr the drawdown in the observation wells were respectively equal to 1.62m and 0.47m. The distance of the observation wells from the center of the test well were 15m and 32m respectively. Compute the hydraulic conductivity?Which of the following are characteristics of a confined aquifer. Select all that apply. This aquifer is sandwiched between two impermeable layers. These aquifers tend to be filled with clay-like soil medium. These aquifers are typically shallow (close to the ground surface). Pore spaces are 100% filled with water.
- Which of the following are characteristics of an unconfined aquifer. Select all that apply. Pore spaces are 100% filled with water. An artesian well results from digging into this aquifer. This aquifer is sandwiched between two impermeable layers. This aquifer can reach the ground surface if the water table depth is already shallow.Find s.vel.a) A confined stratified aquifer has a total thickness of 16 m and is made up of four layers. The bottom layer has a coefficient of permeability of 30 m/day and a thickness of 5.0 m. Above it is a layer 4 m thickness with a coefficient of permeability of 35 m/day. The third & fourth layers have a permeability of 20 m/day and 45 m/day respectively and are of equal thickness. Calculate the equivalent permeability and transmissivity if the flow is along the stratification.