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A pumping well was drilled penetrating straight into an unconfined aquifer with the thickness of 42 m. The distance of pumping well with first extraction well and second extraction well are 20 and 180 m, respectively. Meanwhile, the drawdown for the first extraction well is 4.5 m, and the second extraction well is 1.5 m. The constant pumping rate has been set at 0.09 m³/s. (c) (i) Sketch the cross section of unconfined aquifer system and label the values.

A pumping well was drilled penetrating straight into an unconfined aquifer with the thickness of 42 m. The distance of pumping well with first extraction well and second extraction well are 20 and 180 m, respectively. Meanwhile, the drawdown for the first extraction well is 4.5 m, and the second extraction well is 1.5 m. The constant pumping rate has been set at 0.09 m³/s. (c) (i) Sketch the cross section of unconfined aquifer system and label the values.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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A pumping well was drilled penetrating straight into an unconfined aquifer with the thickness of 42 m. The distance of pumping well with first extraction well and second extraction well are 20 and 180 m, respectively. Meanwhile, the drawdown for the first extraction well is 4.5 m, and the second extraction well is 1.5 m. The constant pumping rate has been set at 0.09 m³/s. (c) (i) Sketch the cross section of unconfined aquifer system and label the values. (ii) Determine hydraulic conductivity of the groundwater through the soil media when it was being pumped out and classify the type of soil according to TABLE Q1(c). (iii) Point out THREE (3) negative effects that might happen for over - pumping aquifers.
Transcribed Image Text:A pumping well was drilled penetrating straight into an unconfined aquifer with the thickness of 42 m. The distance of pumping well with first extraction well and second extraction well are 20 and 180 m, respectively. Meanwhile, the drawdown for the first extraction well is 4.5 m, and the second extraction well is 1.5 m. The constant pumping rate has been set at 0.09 m³/s. (c) (i) Sketch the cross section of unconfined aquifer system and label the values. (ii) Determine hydraulic conductivity of the groundwater through the soil media when it was being pumped out and classify the type of soil according to TABLE Q1(c). (iii) Point out THREE (3) negative effects that might happen for over - pumping aquifers.
TABLE Q1(c) Hydraulic conductivity Hydraulic conductivity (m/day) Material Gravel, coarse Gravel, medium Gravel, fine Sand, coarse Sand, medium Sand, fine 150 270 450 45 12 2.5 Silt 0.08 Clay Sandstone, fine-grained Sandstone, medium-grained 0.0002 0.2 3.1 Limestone 0.94
Transcribed Image Text:TABLE Q1(c) Hydraulic conductivity Hydraulic conductivity (m/day) Material Gravel, coarse Gravel, medium Gravel, fine Sand, coarse Sand, medium Sand, fine 150 270 450 45 12 2.5 Silt 0.08 Clay Sandstone, fine-grained Sandstone, medium-grained 0.0002 0.2 3.1 Limestone 0.94
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