Purpose:
The purpose of this study is to develop and demonstrate a generic GIS
flood-inundation model by initial application in the Flint River
Basin in Georgia. Follow-on
work could lead to developing the capability to demonstrate
prior-flood and during-flood applications in selected basins within
the United States. VIEW
selected background illustrations
Background:
During
flooding caused by Tropical Storm Alberto (TSA), July 1994, the US
Geological Survey (USGS) Center for Spatial Analysis Technology (CSAT)
found that flood inundation could be modeled using a combination of
Geographic Information System (GIS) databases and USGS
regional-hydrologic relationships. An experimental GIS
flood-inundation model was constructed to assist many agencies with
much needed flood-inundation estimates.
The resulting models can be coupled with state-of-the-art
visualization techniques, such as those employed by the Georgia Tech
Research Institute (GTRI), to give concerned agencies and the public
a quick visual reference to flood impacts.
A GIS flood-inundation model may also be coupled with
National Weather Service (NWS) information and/or real-time
stream-gage information to monitor flood inundation as flooding
occurs. Perhaps the
principle value of a GIS flood-inundation model will be its usage to
aid planning processes and floodplain utilization to discern
problems prior to any large flood event.
In
May, 2000, the National Weather Service (NWS) Southeast River
Forecast Center (SERFC) selected the Flint River Basin, Albany,
Georgia area, to showcase flood inundation and visualization
information technologies in partnership with USGS, Georgia District
and The Georgia Tech Research Institute (GTRI).
The interagency effort is to develop a NWS flood disaster
prototype to support NWS's National Advanced Hydrologic Predictive
Services (AHPS) program to utilize best available information
technology to depict floods, initially in developed areas.
The joint effort will enable NWS, City of Albany officials,
the news media and the public to visualize actual or predicted flood
inundations from user selected view points.
Selected portions of the capability are to be posted to the
Internet. SERFC goals
are to have an initial mock-up of Albany area visualization and
flood inundation prototype for demonstration by the winter of 2001.
After subsequent development, the prototype USGS-GTRI Flood
Inundation and Visualization Information System is planned to be
factored into the new Albany Flint River Center for education and
public outreach.