find the diameter and drawdown of well witch is penetrating in unconfined aquifer with depth 12 m to discharge the water at rate 0.5 cumcs from a ground, the hydraulic conductivity is 10 m/day, the storag coefficent of medium sand soil is 20, the drawdown of two testing wells awy 330m and 510m is 2.4m and 1.2m, respectively?

find the diameter and drawdown of well witch is penetrating in unconfined aquifer with depth 12 m to discharge the water at rate 0.5 cumcs from a ground, the hydraulic conductivity is 10 m/day, the storag coefficent of medium sand soil is 20, the drawdown of two testing wells awy 330m and 510m is 2.4m and 1.2m, respectively?

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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5.The diameter of a well is 300 mm and the depth of the aquifer is 20m. The radius of of circle of influence was found to be 135m. The coefficient of permeability of soil is 30 m/d. Calculate the drawdown of the well if the aquifer is a) confined, and b) unconfined. The yield required from the well in both the cases is 3000 cum/d.
This is for hydrology. How would I calulate the time it would take for the plume to reach the next well in it's path? Plume is moving in a southeast direction with with the next well at a distance of 61.2m away with a hydraulic gradient of 0.15m between the two wells. Here is the other information I have. Thank You A confined aquifer with the top of the aquifer about 13.5 m below the surface. The aquifer is 5.5 m thick and is bounded by impervious rock below (forming the datum for the hydraulic head measurements) and a clay aquitard above. Analysis of the aquifer material reveals a bulk density of 1.75 g/cm3, porosity of 0.35 and 0.55% organic carbon. After a pumping test, you calculate that the transmissivity of the aquifer is 0.00025 m2/s and the storativity is 0.000055. What monitoring well(s) would you next expect to see toluene found in and in approximately how long?
Answers: a) 360 cm3/sec b) 1.12 c) 2.8 meters
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A capture well is pumping at a rate of 1700 m^3 /day from a confined aquifer with a hydraulic conductivity of 425 m/day, an initial hydraulic gradient of -0.00098 and a saturated thickness of 22 m. Water is flowing from west to east. a. What is the maximum width of the capture zone in m to the nearest ones place? b. What is the distance from the well to the stagnation point in m to the nearest ones place? Consider what sign makes sense. c. True or False: The majority of the capture zone is to the west of the capture well.
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3c,d,e
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A well was constructed to pump water from a confined aquifer. Two observation wells were constructed distances of 60m and 220m respectively. At a steady pumping rate of 0.15m^3/min, the drawdown in the observation wells were respectively equal to 1.5m and 5.2m. Diameter of the test well is 0.75m and thickness of confined aquifer is 15m. 1. Determine the hydraulic conductivity of the soil in m/min. 2. Determine the drawdown at the test well in m. 3. What is the value of the transmissivity of the confined aquifer in m^2/day?