1 st question 1. The following data are obtained from a cavity tube well: Discharge 0.062 m3Drawdown 5.3 m Permeability of the aquifer 62 m/day Depth of cavity 23 cmRadius of influence 183 m Determine the radius and width of cavity2. A 26-cm well penetrates 38 m below static water level (GWT). After a longperiod of pumping at a rate of 2200 Ipm, the drawdowns in the observation wellsat 16 m and 38 m from the pumped well are 1.5 m and 0.8 m, respectively.Determine the following: a. the transmissibility of the aquifer b. the drawdown inthe pumped well assuming R = 350 m c. the specific capacity of the well3. An artesian aquifer, 45 m thick has a porosity of 43% and bulk modulus ofcompression 2500 kg/cm2. Estimate the storage coefficient of the aquifer. Whatfraction of this is attributable to the expansibility of water? Bulk modulus ofelasticity of water = 2.4 x 104 kg/cm2.

1. The following data are obtained from a cavity tube well: Discharge 0.062 m3 Drawdown 5.3 m Permeability of the aquifer 62 m/day Depth of cavity 23 cm Radius of influence 183 m Determine the radius and width of cavity

1. The following data are obtained from a cavity tube well: Discharge 0.062 m3 Drawdown 5.3 m Permeability of the aquifer 62 m/day Depth of cavity 23 cm Radius of influence 183 m Determine the radius and width of cavity

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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Concept explainers

Methods to Determine Vertical Stress

The load applied to the soil is transferred to the underground. The presence of water at soil pores and solid grains above the soil are the primary components that are responsible for the effective load transfer. Due to the load acting, the internal component of the soil or the underground formations undergoes deformations or a tectonic shift. The amount of deformation depends upon the amount of load acting on the soil surface, which indeed, depends on the weight of everything present above the soil. Due to this, the underground soil element develops internal stresses which try to resist the tectonic changes.

Question

1 st question

1. The following data are obtained from a cavity tube well: Discharge 0.062 m3
Drawdown 5.3 m Permeability of the aquifer 62 m/day Depth of cavity 23 cm
Radius of influence 183 m Determine the radius and width of cavity
2. A 26-cm well penetrates 38 m below static water level (GWT). After a long
period of pumping at a rate of 2200 Ipm, the drawdowns in the observation wells
at 16 m and 38 m from the pumped well are 1.5 m and 0.8 m, respectively.
Determine the following: a. the transmissibility of the aquifer b. the drawdown in
the pumped well assuming R = 350 m c. the specific capacity of the well
3. An artesian aquifer, 45 m thick has a porosity of 43% and bulk modulus of
compression 2500 kg/cm2. Estimate the storage coefficient of the aquifer. What
fraction of this is attributable to the expansibility of water? Bulk modulus of
elasticity of water = 2.4 x 104 kg/cm2.

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