![The Flood Green Guide](https://www.infrastructureusa.org/wp-content/uploads/2017/08/wwf-flood-management-1.jpg)
The Flood Green Guide organizes flood management methods into two categories: structural and non-structural. Structural methods involve physical changes to natural features or human infrastructure, including engineered (hard) methods (sometimes referred to as gray methods), such as dams or floodways, and natural and nature-based (soft) methods (sometimes referred to as green methods), such as wetland protection, upper watershed restoration or rain gardens.
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