FUNCTIONAL FLOODPLAINS EXPLORER

Conservation Science Partners has partnered with American Rivers to conduct the National Functional Floodplains Assessment and develop the Functional Floodplains Explorer, a publicly accessible interactive tool quantifying the degree of floodplain protection and alteration across the United States.

This web-based tool offers conservation practitioners a better understanding of the extent of floodplain protection, floodplain threats, human flood risk, and floodplain biodiversity. Identifying opportunities to invest in new and secure existing protections is possible.

Citation: Conservation Science Partners. 2025. Functional Floodplains Assessment of the United States (FFA-US) 1.0

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Geography
Floodplain Protection
Floodplain Threats

Floodplain Values
Floodplain Threats
Floodplain Alteration (0-100)
Lateral Connectivity Alteration (0-100)
River Flow Alteration (0-100)
Human Development (0-100)
Flood Risk
Flood Risk Index (0-100)
Social Vulnerability (0-100)
Flooding Frequency (#/year)
Aquatic Biodiversity
Native Aquatic Species (#)
Imperiled Species (#)

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FUNCTIONAL FLOODPLAINS EXPLORER
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Basemap Land Ownership Floodplains Rivers/Streams Screenshot Save Link