Flooding in the Amite River Basin (August 12August 22, 2016) Raedle, Joe. Signs in Flood. [Photograph]. Retrieved from http://wgno.com/2016/08/17/206724/ Clause, Scott. Flooding in Youngsvile. [Photograph]. Retrieved from http://gridironnow.com/baton-rouge-flooding-louisiana-floods TREY STEWART THE UNIVERSITY OF TEXAS 14SEP16 Research Goal To report on the August 2016 flooding in Louisiana by looking at the following data: Precipitation (NWS and USGS) River Stage (USGS) Elevation (USGS) High Water Marks (USGS) Flood Details
Historic amount of precipitation in south Louisiana Over 2 feet in some locations Most occurred within 2-day period (August 12-13) 1000 year event Stage records recorded in 8 Louisiana rivers One Amite river gauge beat record by 6 feet! 13 Deaths reported Watershed Location Amite Watershed Flowlines Nations Online Project. Map of Louisiana. [Photograph]. Retrieved from http://www.nationsonline.org/oneworld/map/USA/louisiana_map.htm Watershed Location Comite
River East Baton Rouge Amite Watershed Flowlines Nations Online Project. Map of Louisiana. [Photograph]. Retrieved from http://www.nationsonline.org/oneworld/map/USA/louisiana_map.htm Amite River South Louisiana is Flat! Comite River East Baton
Rouge Amite Watershed Flowlines Nations Online Project. Map of Louisiana. [Photograph]. Retrieved from http://www.nationsonline.org/oneworld/map/USA/louisiana_map.htm Amite River Precipitation Mapping Louisiana precipitation according to NWS August 9-August 16 Amite Watershed precipitation 8/12-8/13 (in inches) generated using Empirical Bayesian Kriging Method with precipitation station data Precipitation Mapping
Louisiana precipitation according to NWS August 9-August 16 My Hometown Amite Watershed precipitation 8/12-8/13 (in inches) generated using Empirical Bayesian Kriging Method with precipitation station data Quantifying Precipitation South Louisiana: 7.1 trillion gallons of water 3x more than Hurricane Katrina Amite River Basin: Average of 14 inches of precipitation
0.5 trillion gallons of water Thiessen polygons for precipitation stations Contour Affects Flooding Behavior Flooding downstream lagged precipitation Amite and Comite Junction Amite and Comite Junction Date River Stage (feet) 8/11/2016
Amite and Comite Junction Baton Rouge Tributary Amite Watershed Contour Plot Lines indicate 10 m height difference High Water Mark Locations High water marks indicate locations with >5 feet of flooding Notice lots of flooding where Comite and Amite Rivers join Comite
River Amite River Amite Watershed High Water Marks and Flowlines High Water Mark Locations At least 110,000 homes damaged across South Louisiana Much flooding occurred outside FEMAs high-risk zone Most homes are not covered by flood insurance Amite Watershed High Water Marks and Land Cover High Water Mark Locations
Flooding on I-10 and I-12 made them unusable from August 12th-16th I-10 West of Baton Rouge remained closed until August 18th I-12 Baton I-10 Rouge Interstate Flooding Final Thoughts and Next Steps Conclusions: Historic rainfall event requiring many days for water to drain Damaged homes and loss of life Buy flood insurance!
Next Steps Map HAND for watershed to compare modeled flood inundation depth with HWM data Determine total precipitation volume upstream from Comite and Amite River junction Look at Amite River slope and the velocity of the stage peak Acknowledgements University of Texas Dr. David Maidment Paul Ruess Louisiana State University Dr. Clint Wilson Questions? References:
Ball, J. (2016, September 23). Louisiana Flood of 2016 made worse by growth-focused policies. Retrieved from NOLA.com: http://www.nola.com/news/baton-rouge/index.ssf/ 2016/09/louisiana_flood_of_2016_develo.html Barney, A. (2016, August 24). Review of Historic Flooding in Louisiana. Retrieved from WeatherWorks: http://www.weatherworksinc.com/Louisiana-Floods-2016-Historic Moscona, M. (2016, August 16). Historic flooding has brought Baton Rouge to its knees . Retrieved from gridironnow.com: http://gridironnow.com/baton-rouge-floodinglouisiana-floods Samenow, J. (2016, August 19). No-name storm dumped three times as much rain in Louisiana as Hurricane Katrina. Retrieved from The Washington Post: https://www.washingtonpost.com/news/capital-weather-gang/wp/2016/08/19/no-name-storm-dumped-three-times-as-much-rain-in-louisiana-as-hurricane-katrina/ Unknown. (2016, August 22). Death toll rises to 13 in historic flood. Retrieved from wwltv.com: http://www.wwltv.com/news/death-toll-rises-to-13-in-historic-flood/ 298408105 Unknown. (2016, August 17). Historic flood death toll climbs to 12 after body found in Livingston Parish. Retrieved from wgno.com: http://wgno.com/2016/08/17/206724/ Unknown. (2016, August 14). Louisiana Flooding: 4 Dead, 20,000 Rescued, 10,000 in Shelters, Drivers Still Stranded on Interstate. Retrieved from Weather.com: https://weather.com/news/weather/news/gulf-coast-flooding-latest-news-rescues-motorists-interstate Wells, C. K. (2016, August 18). I-10 reopens in Lafayette after historic flooding. Retrieved from Nola.com: http://www.nola.com/traffic/index.ssf/2016/08/i10_reopens_lafayette_flooding.html Wells, C. K. (2016, August 16). Louisiana flooding: Interstate 12 reopens, parts of I-10 still closed. Retrieved from Nola.com: http://www.nola.com/traffic/index.ssf/2016/08/i12_open_i10_closed_flood.html
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