Calculate surface infiltration online

Dimensioning of the required infiltration area according to DWA-A 138-1 (10/2024), DWA-A 138 (04/2005) or ATV-A 138 – directly in the browser, without installation.

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What does RAINPLANER® calculate for surface infiltration?

Dimensioning of the required infiltration area or verification of whether a specified infiltration area is sufficient for infiltrating stormwater from connected surfaces. Suitable for high open-space availability and high infiltration capacity of the subsoil.

Calculation Methods

DWA-A 138-1 (10/2024) / DWA-A 138 (04/2005)

Iterative calculation with heavy rainfall intensities (KOSTRA-DWD). The rainfall intensity for an optionally selected duration level and return period can be freely determined.

ATV-A 138 (Reinhold rainfall intensity)

Calculation using the location-specific rainfall intensity according to Reinhold (r(D=15min,n=1)) in accordance with ATV-A 138.

Additional Features

  • ✅ Consideration of the joint share of the infiltration area for optimal determination
  • ✅ Free selection of duration level and return period
  • ✅ Location-specific 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

Swale Infiltration
Trench Infiltration
Shaft Infiltration
Infiltration Basin