Applying Tropical Storm Debbie’s Flood Inundation to Past and Current Datasets
Please join us on November 18, 2014 for the next Coastal Georgia URISA Sub-Chapter meeting.
“Applying Tropical Storm Debby’s Flood Inudation to Past and Current Datasets” discusses how from June 22-27, 2012, tropical storm Debby impacted the South Georgia – North Florida region with record rainfall and flooding.
The City of Kingsland GIS Department took the opportunity to document the extent of the riverine flood water inundation along the St. Marys River in Georgia as a baseline for use in future DRIRM (Digital Flood Insurance Rate Maps) updates, as well as a tool in evaluating the accuracy of the extent of current regulatory flood data for the area. Results of the exercise showed this event to be a new record high water event, surpassing previous record flooding from hurricane Dora in 1964. The current regulatory data for the area is, for the most part, spatially accurate for a riverine event of this type. Analysis of the collected data showed that only minor modifications to the existing DFIRM event would be needed to match the actual recorded inundation extent and that up-to-date LIDAR data played a critical role in the accurate modeling of this event.
P. Hunter Key (GISP)