Calculate trench infiltration online

Dimensioning of the required trench length or height – iteratively according to DWA-A 138-1 (10/2024), DWA-A 138 (04/2005) or ATV-A 138.

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What does RAINPLANER® calculate for trench infiltration?

Dimensioning of the required length or height of the trench infiltration or alternatively the length of the pipe trench infiltration using pipe runs.

Calculation Methods

DWA-A 138-1 / DWA-A 138 – iterative

Iterative calculation using rainfall intensities for selected duration levels and return periods. Storage coefficients according to DWA-A 138-1 or DWA-A 138.

ATV-A 138 (Reinhold rainfall intensity)

Calculation with the location-specific rainfall intensity according to Reinhold (r(D=15min,n=1)).

Additional Features

  • ✅ Height instead of length determination possible
  • ✅ Consideration of additional trench elements (pipes, modular elements) to increase volume
  • ✅ KOSTRA-DWD-2020 rainfall intensities via map selection
  • ✅ Audit-ready PDF report at the push of a button
Basis
  • CurrentDWA-A 138-1 (10/2024)
  • PredecessorDWA-A 138 (04/2005)
  • AlternativeATV-A 138
  • DataKOSTRA-DWD-2020

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Other Calculation Types

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Surface Infiltration
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Swale Infiltration
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Modular Trench System
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Infiltration Basin