estion 4 a. A well 50 cm in diameter penetrates 33 m below the static water...
Question 4 A well 50 cm in diameter penetrates 33 m below the static water table. After a long period of pumping at a rate of 80 m2/h, the drawdowns in two observation wells A and B, 18 and 45 m from the pumped well, were found to be 1.8 and 1.1 m respectively. Determine the hydraulic conductivity of the aquifer (in m/d) . the expected drawdown in the pumped well . the radius of influence of the pumped well,...
a. A well 50 cm in diameter penetrates 33 m below the static water table. After a long period of pumping at a rate of 80 m/h, the drawdowns in two observation wells A and B, 18 and 45 m from the pumped well, were found to be 1.8 and 1.1 m respectively. Determine . the hydraulic conductivity of the aquifer (in m/d) . the expected drawdown in the pumped well • the radius of influence of the pumped well,...
Question 4 a. A well 50 cm in diameter penetrates 33 m below the static water table. After a long period of pumping at a rate of 80 m/h, the drawdowns in two observation wells A and B, 18 and 45 m from the pumped well, were found to be 1.8 and 1.1 m respectively. Determine . the hydraulic conductivity of the aquifer (in m/d) . the expected drawdown in the pumped well the radius of influence of the pumped...
A well is constructed in a confined aquifer. The aquifer has a uniform thickness of 50 ft overlain by a aquitard and the bottom is 115 ft below ground surface (bgs). A pumping test weas used to determine the hydraulic conductivity of the aquifer. The initial piezometric (potentiometric) surface of the confined aquifer was 49 ft bgs at the pumping well and the observation wells. After water was pumped at a rate of 0.46 cu ft/sec for several days, the...
A well is pumping near a barrier boundary at a rate of 0.05 m3/s from a confined aquifer 20 m thick. The hydraulic conductivity of the aquifer is 5 x 10-4 m/s, and its storativity is 4 x 10-5. Determine the drawdown in the observation well after 30 hours of continuous pumping. What is the fraction of the drawdown attributable to the barrier boundary? River fi Гр-240 m 30° 300 m 300 m River fi Гр-240 m 30° 300 m...
A 0.5-m diameter well fully penetrates an unconfined aquifer, which is 40.0 m thick. The drawdown at the pumped well is 10 m and the hydraulic conductivity of the aquifer is 0.2 . 10-3 (m s-'). If the flow is steady and discharge is 0.01 (mºs-'), determine the drawdown at a site 50.0 m from the well. Draw-down (m): 5.0 8.6 18.6 30.0 A wastewater treatment plant treats 1000 (mº
Examples Example 3: A well of diameter 0.5 m fully penetrates a confined aquifer. The well is pumped for a test at 0.833 m3/min and the values of the drawdown at an observation well 20 m from the pumped well are measured at different times. The results are tabulated below. Determine the transmissivity and the storage coefficient of the aquifer using Jacob equation. Time,t min) Prawdown, 0.57 1.49 10 2.43 20 3.31 40 4.34 60 4.97 s (m)
1. (2 points) A well in a uniform, homogeneous, isotropic confined aquifer is pumped at a rate of 815 L/min. After 3 days it looks as if the water levels have stabilized in observation wells at distances of 20 m and 200 m from the pumping well. The drawdown in the well at 20 m is 6.5 m and the drawdown in the well at 200 m is 3.5 m. a) Use the Thiem solution to determine the aquifer transmissivity....
determine w(u) then use to find Transmissivity and storavity lh the well feaches M a 6.5.5 A pumping test was performed to determine the transrnissivity T and the storativity S of a confined aquifer. The drawdown versus time data in an observation well 30 m away from the pumping well are given in the following table. The discharge from the pumped weli was at a constant rate of 4x m'/min throughout the test. Determine the aquifer properties. 110 Time (min)...
please explain the answer for part D. 6.124pts) Giselle has installed a water production well in an unconfined aquifer, She is concerned about the possibility that when the well is in use drawdown will ower the piezometric and that the water will stop flowing. She has asked for your help in the analysis well surface to the bottom of the Currently, the drawdown at observation well A, 120.0 m from the pumped well, s 12.0m. Observation at 80.0 meters is...