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.
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
designed
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.
Overview
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.