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confined aquifer having 20 m thickness . Two observatory wells are installed at a distance of 120m and 160m from the center of main

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.15P

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Concept explainers

Groundwater Flow

The term groundwater refers to the water which is found beneath the earth's surface. Pores present in the soil and rocks with fractures make a passage for rainwater to enter the earth's surface and deposit as groundwater. The flow nature and direction of groundwater under the earth's surface directly impacts the strength and compressibility of the soil, which reflects its ability to support structural loads.

Question

A tube well of 30 cm dia. is installed in a confined aquifer having 20 m thickness . Two observatory wells are installed at a distance of 120m and 160m from the center of main tube well. Under the constant Pumpage rate of 1500 L/min, the observed water depth in the observatory wells is 58m and 59m respectively. The radius of cone of depression was 300m and depth of water (H) at zero drawdown is 65 m. With the above data calculate: 1) Co-efficient of transmissivity (T) and Co-efficient of Permeability (K).

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