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!