Calculate infiltration basin online

Dimensioning of the required volume of an infiltration basin – iteratively according to DWA-A 138-1 (10/2024) or DWA-A 138 (04/2005), simplified method.

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What does RAINPLANER® calculate for infiltration basins?

Dimensioning of the required volume of an infiltration basin using the simplified method. A rectangular basin with fixed dimensions, a specified and equal slope gradient on all sides, and a target ponding depth is assumed.

Calculation Methods

DWA-A 138-1 (10/2024) – iterative

Iterative calculation using rainfall intensities for selected duration levels and return periods according to the current standard.

DWA-A 138 (04/2005) – iterative

Calculation according to the predecessor standard, likewise iterative with freely selectable duration levels and return periods.

Additional Features

  • ✅ Rectangular basin with individually configurable dimensions
  • ✅ Configurable slope gradient and ponding depth
  • ✅ 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)
  • 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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Trench Infiltration
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Retention Storage