Floodplain Base Flood Elevations

The FIRM is the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP).洪水保险费率图（Flood Insurance Rate Map，缩写FIRM）是国家洪水保险计划（National Flood Insurance Program，缩写NFIP）开展洪泛区管理、减灾及保险业务的核心依据。