Learn how rain gardens collect stormwater

Learn what rain gardens are and how they are included in flood projections 



Rain gardens are a type of green infrastructure built to mitigate pluvial (stormwater) flooding. These features are constructed vegetated areas designed for enhanced infiltration and collecting rainwater from surrounding impervious areas. These features detain and infiltrate rainwater locally, rather than allowing it to be carried away as runoff, which contributes to flooding.



NYC DEP green infrastructure rain garden rendering


Flood risk reduction

Information on Flood Factor comes from the First Street Foundation Flood Model. A rain garden 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 

Learn how green infrastructure reduces flooding and improves water quality

Adaptation types

Adaptation methodology

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

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