A 20 mm diameter well fully penetrates a confined aquifer of 30 m depth. For a pumpage of 35 litres/second the steady drawdowns at 100 m and 300 m distances from the well are observed as 3.2 m and 2.5 m respectively. Estimate the coefficient of permeability in m/day and transmissibility of the aquifer in m2 per day. Estimate also the drawdown at the well.

A 20 mm diameter well fully penetrates a confined aquifer of 30 m depth. For a pumpage of 35 litres/second the steady drawdowns at 100 m and 300 m distances from the well are observed as 3.2 m and 2.5 m respectively. Estimate the coefficient of permeability in m/day and transmissibility of the aquifer in m2 per day. Estimate also the drawdown at the 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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10 m thick confined aquifer gives the steady state discharge of 0.03 m³/s through the well of 50 cm radius. Due to pumping, the height of water in the well is dropped from 15 m to 10 m and the 939 radius of influence is obtained as 500 m. What is the coefficient of permeability (mm/s)?