How can I find the interior dimensions (rounded to the nearest foot) of a rectangular grit tank basin to provide an average day hydraulic retention time (HRT) of 12 minutes with an average day influent flow of 3.0 MGD. Show answers on a dimensioned sketch. It does not have to be to scale but does need to be neat (drawn with straight edge). Work within the following constraints: Width to depth ratio of the liquid in the basin should be 1:1 Length to width ratio equals 3.5:1 Assume the inlet and outlets are on the opposite short sides of the rectangle

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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How can I find the interior dimensions (rounded to the nearest foot) of a rectangular grit tank basin to provide an average day hydraulic retention time (HRT) of 12 minutes with an average day influent flow of 3.0 MGD. Show answers on a dimensioned sketch. It does not have to be to scale but does need to be neat (drawn with straight edge). Work within the following constraints:

  • Width to depth ratio of the liquid in the basin should be 1:1
  • Length to width ratio equals 3.5:1
  • Assume the inlet and outlets are on the opposite short sides of the rectangle
  • Assume that a sharp-crested weir outlet is built into the effluent wall
  • Basin should have 2.0 ft of freeboard above the water line at average flow
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