A well 30 cm diameter penetrates 30m below the static water table. After a long period of pumping at a rate of 0.022 m3/sec .The drawdowns in well 17.37m and 45.11m from the pumped were found to be 3.65m and 2.25m respectively. What is the transmissivity of the aquifer? What is the approximate drawdown in the pumped well?

A well 30 cm diameter penetrates 30m below the static water table. After a long period of pumping at a rate of 0.022 m3/sec .The drawdowns in well 17.37m and 45.11m from the pumped were found to be 3.65m and 2.25m respectively. What is the transmissivity of the aquifer? What is the approximate drawdown in the pumped well?

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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4. A confined aquifer of 10-m thickness and 16.43 m/day hydraulic conductivity is fully penetrate by a pumping well of 0.5 m radius operating at Q=425 m³/day. Determine the drawdown under steady-state conditions in a) the pumping well and b) 50 m away from the well. Take the radius of influence of the pumping well as 300 m.
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A confined aquifer with T = 7.0 x 10-3 m2/s and S = 5 x 10-4 is pumped by two wells, 35 m apart. One well is pumped at 7.6 L/s and one at 15.2 L/s. Plot the drawdown h0-h versus distance along a line joining the wells, 4 hours after the start of pumping. Use 5 m increments along the line. How would I go about this question if my initial r1 would equal 0 and and r2 would equal 35m additionally how would I get the pumping rates at each 5 m increments. overall please give a step by step on how I Would go about this question
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TELEGRAM Q1: A 30cm diameter well penetrates vertically through an aquifer to an impermeable stratum located 18.0 m below the static water table. After a long period of pumping at a rate of 1.2 m3/min, the drawdown in test holes 11m and 35 m from the pumped well is found to be 3.05 and 1.62m respective. What is the hydraulic conductivity of the aquifer? Express in meters per day. What is its transmissivity? Express in cubic meters per day per meter. What is the drawdown in the pumped well?
ENVIRONMENTAL ENGINEERING ( Practice Questions) a). Suppose a well 0.36m in diameter has been pumped at a rate of 3,000cu.m/day for a long enough time that steady-state conditions apply. An observation well located 30m from the pumped well has been drawn down by 1.0m, and another well at 120m is drawn down by 0.4m. The pumped well extends completely through an unconfined aquifer 60.0m thick. GIVEN: For an unconconfined aquifer, Q = πK(h2c1 – h2c2) / [Ln(r1 / r2)] Determine the hydraulic conductivity, K. (7 marks) (ii) Estimate the drawdown at the pumped well. State any assumptions made. b). A confined aquifer 40.0 m thick has two monitoring wells spaced 400m apart along the direction of groundwater flow. The difference in water level in the wells is 4.0m (the difference in piezometric head). The hydraulic conductivity is 40m/day. Estimate the rate of flow per meter of distance perpendicular to the flow. C). Suppose the aquifer, which has a…
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