The Delaware Department of Natural Resources and Environmental Control (DNREC) Flood Tool is
interactive web map application. This tool is designed to aid you in researching your flood
in the state of Delaware.
Click the menu icon on the top left corner for more options
The Delaware Department of Natural Resources and
Environmental Control (DNREC) Flood Planning Tool is an interactive web map application
to aid you in researching your flood risk in the State of Delaware.
Disclaimer: The Flood Planning Tool provided herein is for reference only within the State of Delaware boundaries. The user of this information understands and acknowledges that the data may be inaccurate or contain errors or omissions and the user assumes full responsibility for any risks or damages resulting from any use or reliance upon this data. Delaware DNREC does not guarantee the accuracy or reliability of the data generated from this service.
The Delaware Department of Natural Resources and Environmental Control (DNREC) Flood Tool is an interactive web map application. This tool is designed to aid you in researching your flood risk in the state of Delaware. It is designed to provide floodplain managers, insurance agents, developers, real estate agents, engineers, surveyors, local planners and citizens with an effective means by which to make informed decisions about the degree of flood risk for a specific area or property. Map features are connected to geospatial databases that may be queried by users in order to obtain pertinent information that may otherwise be difficult to obtain or relate to specific geographic locations, such as the Advisory Flood Height (AFH) for flood Zone A and downloadable HEC-RAS models.
The online tool is for use in administering the National Flood Insurance Program. It does not necessarily identify all areas subject to flooding, particularly from local drainage sources of small size. To obtain more detailed information in areas where Base Flood Elevations have been determined, users are encouraged to consult the latest flood profile data contained in the official Flood Insurance Study (FIS). These studies are available online at www.msc.fema.gov.
Advisory Flood Height (AFH)
Advisory Flood Height (AFH) represents the elevation of the surface of the 1% annual chance or regulatory flood in Zone A (approximate study) modeled areas. The AFH value for a given location serves as a surrogate base flood elevation (BFE) when the latter is not available. AFH data are subject to limitations such as: no hydraulic structures (bridges/culverts/dams) are considered, no reservoir routing/attenuation of flood discharges are incorporated and no channel survey data are included. Therefore, AFH’s may be inaccurate especially near structures.