Use infiltration basins to store stormwater runoff

Learn what infiltration basins are and how they are included in flood projections.


An infiltration basin is a vegetated area where stormwater runoff is stored and then infiltrated into the soil. An infiltration basin is an example of grey infrastructure. Grey infrastructure is engineered infrastructure that is built from hard, impervious materials such as concrete. Often, grey structural types are used in conjunction with one another and/or in tandem with green infrastructure projects to reduce flood risk. 


An infiltration basin in Fall River, Massachusetts

Flood risk reduction

Information on Flood Factor comes from the First Street Foundation Flood Model. An infiltration basin is one of the 40 different types of flood risk reduction projects, known as adaptation, that this model considers when calculating and validating flood projections. 

The Adaptation Team continues to collect information on the flood infrastructure that exists across the country to make sure the Flood Model includes as many adaptation projects as possible. If you know of any projects that are not shown today, please help the team by submitting this flood protection project user input form. The adaptation database contains 23,000 features today. We know there are more projects to include and value your input!


Learn more

Understand how stormwater management plans reduce rainwater runoff

Preserve natural drainage systems

How can community science and local knowledge improve the Flood Model?

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