Recommendations
Pressure drop in Leopold blocksTriangular weirTablet calcium hypochloriteActivated sludge bioreactorGrit chamber
Head loss in sewer trash racks
Given downstream depth
Given upstream depth

Input data

Flow (Q)

Channel width (b)

Bar width (w)

Distance between bars (d)

Downstream water depth (yj)

Bar slope (𝝓)

Kirschmer β

Output data

Upstream velocity (Um)

Upstream energy (Em)

Upstream water depth (ym)

Downstream velocity (Uj)

Between bars velocity (U)

Downstream energy (Ej)

Head loss (Hf)

Water level difference (ym - yj)

Upstream depth at 50% obstruction (ym50%)

Upstream velocity at 50% obstruction (Um50%)

Upstream energy at 50% obstruction (Em50%)

Head loss at 50% obstruction (hf50%)

Between bars velocity at 50% obstruction (U50%)

Water level difference at 50% obstruction (ym50% - yj)

References

  • PESSOA, Constantino A. Tratamento de esgotos domésticos. 7. ed. Rio de Janeiro, ABES, 2014.