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How Do HS - H - HL Flumes Differ | Open Channel Flow
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How Do HS - H - HL Flumes Differ

Flumes:  HS - H - HL

The H Series of flumes developed in the 1930's, were broken up into three distinct classes:

  • HS - low flows - "S" equaling small
  • H - medium flows
  • HL - high flows - "L" equaling large

WITHIN each class of flume, the flumes are scale models of each other.  They are not, however, scale models of each other when comparing BETWEEN classes - the general layouts are similar, but they are not identical.

For a given height (D = flume depth):  

  • HS flumes are the narrowest (1.05D) and have an average length (1.5 D)
  • H flumes average in width (1.90 D) and are the shortest in length (1.35 D)
  • HL flumes the widest (3.20 D) and have an average length (1.5 D)

HS Flume Dimensions

dimensionless layout of HS flume

H Flume Dimensions

dimensionless layout of H flume

HL Flume Dimensions

dimensionless layout of HL flume

 

Source:  Field Manual for Research in Agricultural Hydrology

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