solve 19 and 20 Situation 5A well of diameter 300 mm is constructed to the full depth of a soil of thickness 150 m, below which is animpermeable layer. The water table is 10 m below the ground surface. A pumping test of 12 m³/hr hasresulted a draw down of 10 m. Assuming ro = 400 m. 19. If the flow rate increases to 18 m³/hr, what will be the estimated draw down?A.B.15.3 m6.8 mC. 20.2 mD. 31.7 m20. In this type of flow, the hydraulic gradient for all layers of soil are equal.A.Parallel FlowC. Laminar FlowB. Turbulent FlowD. Perpendicular Flow

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Situation 5 A well of diameter 300 mm is constructed to the full depth of a soil of thickness 150 m, below which is an impermeable layer. The water table is 10 m below the ground surface. A pumping test of 12 m³/hr has resulted a draw down of 10 m. Assuming ro = 400 m.

Situation 5 A well of diameter 300 mm is constructed to the full depth of a soil of thickness 150 m, below which is an impermeable layer. The water table is 10 m below the ground surface. A pumping test of 12 m³/hr has resulted a draw down of 10 m. Assuming ro = 400 m.

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

Field applications of hydraulic conductivity

Hydraulic conductivity is one of the hydraulic properties of soil defined as a measurement of the ability of a porous medium to permit water movement or fluid flow through it. It is denoted by the letter K. It is influenced by the density and viscosity of the fluid. It is also called permeability. Hydraulic conductivity is defined as the ratio of velocity to the hydraulic gradient. The different methods used to determine the hydraulic conductivity are laboratory methods (constant head permeability tests and falling head tests), in-situ field methods (pumping in and pumping out tests), small scale field tests (infiltration tests and slug tests), and indirect methods such as estimation from grain size, consolidation test data, and horizontal capillary test. The pedotransfer function (PTF) method is a specific empirical estimating approach employed in the soil sciences is also used to determine the hydraulic conductivity of the soil.

Question

solve 19 and 20

Situation 5
A well of diameter 300 mm is constructed to the full depth of a soil of thickness 150 m, below which is an
impermeable layer. The water table is 10 m below the ground surface. A pumping test of 12 m³/hr has
resulted a draw down of 10 m. Assuming ro = 400 m.

19. If the flow rate increases to 18 m³/hr, what will be the estimated draw down?
A.
B.
15.3 m
6.8 m
C. 20.2 m
D. 31.7 m
20. In this type of flow, the hydraulic gradient for all layers of soil are equal.
A.
Parallel Flow
C. Laminar Flow
B. Turbulent Flow
D. Perpendicular Flow

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