A 0.80 m deep bed of sand filter (length 4m and width 3m) is made of uniform particles (diameter = 0.40 mm, specific gravity = 2.65, shape factor = 0.85) with bed porosity of 0.4. the bed has to be backwashed at a flow rate of 3.60 m³/min. During backwashing, if the terminal settling velocity of sand particles is 0.05 m/s, the expanded bed depth (in m, round off to 2 decimal places) is

Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
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Chapter6: Hydraulic Conductivity
Section: Chapter Questions
Problem 6.7P
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A 0.80 m deep bed of sand filter (length 4m and width 3m) is
made of uniform particles (diameter = 0.40 mm, specific gravity
= 2.65, shape factor= 0.85) with bed porosity of 0.4. the bed
has to be backwashed at a flow rate of 3.60 m³/min. During
backwashing, if the terminal settling velocity of sand particles
is 0.05 m/s, the expanded bed depth (in m, round off to 2
decimal places) is
Transcribed Image Text:A 0.80 m deep bed of sand filter (length 4m and width 3m) is made of uniform particles (diameter = 0.40 mm, specific gravity = 2.65, shape factor= 0.85) with bed porosity of 0.4. the bed has to be backwashed at a flow rate of 3.60 m³/min. During backwashing, if the terminal settling velocity of sand particles is 0.05 m/s, the expanded bed depth (in m, round off to 2 decimal places) is
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