A stratified aquifer consists of 2 ft of 200-md sand, 3 ft of 100-md sand, and 5 ft of 10-md sand. What is the steady-state water injection rate into this 8-in. diameter well when the well pressure is 600 psia and the reservoir pressureat a distance of 100 ft is 500 psia? Assume water viscosity of 1 cp and water formation volume factor of 1 resbbl/STB.

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Answered: A stratified aquifer consists of 2 ft…

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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Could you help me answer the following question? Thank you A fully penetrating pumping well extracts groundwater from a confined aquifer with a pumping rate of 750 m3/day. The hydraulic conductivity of the aquifer is 10 m/day and the saturated thickness is 50 m. The drawdown of the aquifer from this pumping well is insignificant at a distance of 1000 m from the pumping well. At what distance from the pumping well is the drawdown 10 cm? Assume the hydraulic gradient is negligible in the local area. Transmissivity T = 1746.76 gal/min/ft Hydraulic conductivity = 11.645 gal/min/ft2 Storativity = 0.809 The drawdown on Jenny’s Well by the end of August. =0.6902 ft. Observation well situated is 69.7 ft away from the pumping well (which is pumping at the rate of 305 gal/min). The aquifer is confined, and the depth has been measured from well logs and is 150 ft. The data for time (t) and drawdown (s) is given below: t (min) s (ft) 0.072 0.003 0.105 0.006 0.155 0.012…
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 thickness of 30m (m) and is fully penetrated by well where the aquifer is pumped at the rate of 500 litres per second. The groundwater thickness (H₁) is 50 m. The drawdown measured in two observation wells located at distance of 10 m and 100 m from the well are 7.5 m and 0.5m respectively. Determine the average hydraulic conductivity of the aquifer. At what distance from the well the drawdown is insignificant i.e. is zero (R).
C8
Question Two An unconfined aquifer with a well pumping 0.4m3/s and saturated thickness is 24m.lf the drawdown 50m from the well is 1m and the drawdown 100m from the well is 0.5m, calculate the hydraulic conductivity and transmissivity of the aquifer.The solution should include a labeled diagram.
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.
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A well in an unconfined aquifer is pumped at the rate of 50 L/s ( 800 gal/min.). The thickness of the aquifer is 30 m. and the elevation of the phreatic surface is 25 m. above the underlying aquiclude at an observation of well 20 m away from the well and 34.6 m above at a well 50 m. away. What is the value of K for this aquifer?

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