This article discussed the use of geospatial data such as
elevation data to estimate flooding in New Orleans. Light detection and ranging
(lidar) remote sensing is a tool that is used to map this area. This data was
used in response to Katrina to analyze inundation. Lidar data was collected in
2002 by the Louisiana Oil Spill Coordinator’s Office and made publicly
available.
The data recorded in 2002 was valuable after Katrina to map
the extent of flooding throughout New Orleans. The lidar elevation data was
used to estimate the volume of floodwater in order to predict the amount of
time required to remove it. The depths were relative to the elevation of water
that was recorded by a gage on Lake Pontchartrain.
The application of topographic data with gage data for
mapping was very useful when information was needed. Elevation data is valuable
to assess flooding in cities and may aid in planning and reconstruction of
infrastructure in the future.
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