1. Lonnie G. Harper & Associates, Inc. Lonnie G. Harper, PE & PLS (LGH) David Minton, PE (LGH) Dr. Joseph Suhayda (Coastal Oceanographic Consultant) Dr. Roy Dokka (LSU C4G) Dr. Eddie Lyons (McNeese State University) 1

2.  THE PRELIMINARY DFIRMs RESULT IN A SIGNIFICANT CONVERSION OF A ZONES TO V ZONES IN CAMERON PARISH  BUILDING WITHIN V ZONES RESULTS IN INCREASED CONSTRUCTION COSTS  FEDERAL ASSISTANCE IS UNAVAILABLE IN V ZONES 2

3. 3

4. 4

5.  CALIBRATION ERRORS ARE PRESENT ASSOCIATED WITH THE HINDCAST FOR HURRICANE RITA: ERRORS IN PREDICTED HIGH-WATER MARKS (HWM) COMPARED TO MEASURED HWM AS GREAT AS+/- 4.5 FEET  AN EXAMINATION OF THE PRELIMINARY ADCIRC GRID HAS REVEALED MAJOR CHENIER RIDGES, LEVEES, MANMADE FEATURES, AND OTHER TOPOGRAPHIC DATA WERE OMITTED FROM THE MODEL 5

6. CAMERON PARISH AREA 6

7.  LGH COMPLETED A REVIEW OF MUCH OF THE TOPOGRAPHIC DATA USED FOR FIS  FIELD SURVEY DATA HAS BEEN GATHERED FOR COMPARISON TO ADCIRC AND LIDAR ADCIRC VS. LIDAR WHAFIS VS. LIDAR LIDAR VS. SURVEY ELEVATIONS 7

8. MAX ELEVATION: 2.22 FEET 8Rev 12-15-2008

9. MAX ELEVATION: +10 FEET 9Rev 12-15-2008

10.  LIDAR NAVD88 (2004.65) WAS REPORTEDLY USED AS THE VERTICAL DATUM  THE SPARSENESS OF FEMA’S TOPOGRAPHIC DATA USED IN THEIR WHAFIS MODEL OMITS MAJOR TERRAIN FEATURES  FOLLOWING SLIDES ILLUSTRATE DIFFERENCES BETWEEN ELEVATIONS FROM FEMA’S WHAFIS MODEL AND ELEVATIONS EXTRACTED FROM LIDAR NAVD88 (2004.65) 10Rev 12-15-2008

11. LARGE INTERPOLATIONS OMIT MAJOR TERRAIN FEATURES 11Rev 12-15-2008

12.  THE FOLLOWING SLIDES ILLUSTRATE THE DISCREPANCIES BETWEEN LIDAR TOPOGRAPHIC DATA AND LGH & ASSCS GPS SURVEYED TOPOGRAPHIC DATA 12Rev 12-15-2008

13. 13Rev 12-15-2008

14. 14Rev 12-15-2008

15.  STARTING POINT TYPICALLY BEGINS 500 FEET IN GULF OF MEXICO  DUNE (DU) COMMAND LINE USED TO MODEL STRUCTURES SUCH AS LEVEES OR SEAWALLS OMITTED FROM THE WHAFIS MODEL  WHAFIS TERRAIN DATA DOES NOT REFLECT ACTUAL CONDITIONS OVERWATER FETCH (OF) VS. INLAND FETCH (IF) AND VEGETATION HEADER (VH) 15Rev 12-15-2008

16.  A ZONE AREAS AS DEFINED BY WHAFIS ARE OMITTED FROM DFIRMs  IMPROPER DEFINITION OF DRAG COEFFICIENT FOR VEGETATION HEADER COMMAND LINES 16Rev 12-15-2008

17.  EVERY WHAFIS TRANSECT (104) HAS BEEN SHIFTED SOUTH RESULTING IN THE STARTING POINT OF EACH TRANSECT BEING OVER THE OPEN WATER OF THE GULF OF MEXICO  THIS HAS RESULTED IN STATIONS, WITH COMMAND LINES MODELING VEGETATION (VH OR VE), BEING LOCATED OVER OPEN WATER 17Rev 12-15-2008

18. COMMAND ELEVATION STATION DISTANCE FROM BEGINNING VEG TYPE 18Rev 12-15-2008

19. 19Rev 12-15-2008

20.  THERE ARE MANY INSTANCES OF OVERWATER FETCH (OF) COMMAND LINES BEING USED WHERE VEGETATION HEADER (VH) COMMAND LINE SHOULD BE USED. THIS, IN EFFECT, CAUSES A LAKE TO MODELED IN REGIONS WHERE EMERGENT LAND EXISTS  ONE EXAMPLE IS THE SOUTHERN END OF TRANSECT 17, LOCATED IN THE JOHNSON BAYOU AREA 20Rev 12-15-2008

21. 21Rev 12-15-2008

22.  OF (OVERWATER FETCH) COMMAND LINE IS USED FOR WATER WITH DEPTHS GREATER THAN 10 FEET, SUCH AS LAKES OR BAYS  IF (INLAND FETCH) COMMAND LINE IS FOR SHELTERED WATER WITH A DEPTH OF LESS THAN 10 FEET 22Rev 12-15-2008

23. SHOULD BE MODELED AS IF COMMAND LINE RATHER THAN OF 23Rev 12-15-2008

24.  LGH INSTALLED SENSORS THROUGHOUT CAMERON PARISH FOR HURRICANE IKE 7 UNITS AT 0.5 SECOND INTERVALS 4 UNITS AT 2 SECOND INTERVALS  LGH CREATED A WAVE HEIGHT TO WATER DEPTH RATIO FROM ACTUAL FIELD DATA FROM HURRICANE IKE 24Rev 12-15-2008

25. 25

26.  ONLY ONE TYPE OF VEGETATION (SPARTINA PATENS) WAS USED IN FEMA’S WHAFIS MODEL  CAMERON PARISH CONTAINS AT LEAST FIVE (5) DIFFERENT TYPES OF TERRAIN: FRESHWATER MARSH INTERMEDIATE MARSH BRACKISH MARSH SALTWATER MARSH OTHER (EMERGENT TERRAIN USUALLY FOUND ON CHENIER RIDGES) 26Rev 12-15-2008

27. CALCASIEU LAKE GULF OF MEXICO JOHNSON BAYOU CAMERON HACKBERRY HOLLY BEACH OAKGROVE CREOLE 27Rev 12-15-2008

28. o ALL TRANSECTS WERE MODIFIED AND RECOMPUTED BY LGH BASED ON THE FOLLOWING INPUT MODIFICATIONS: o STARTING POINT PLACED IN PROPER POSITION o PROPER COMMAND LINES INSERTED IN INPUT FILES o CORRECTED ELEVATIONS o CORRECTED VEGETATION PROPERTIES 28Rev 12-15-2008

29. A ZONES ACHIEVED WITH PROPER STARTING POINT, ELEVATIONS, COMMAND LINES, AND DEFAULT VALUE FOR Cd 29Rev 12-15-2008

30. A ZONES INCREASE DRAMATICALLY AS Cd INCREASES 30Rev 12-15-2008

31. SUMMARY  LOW RESOLUTION OF TOPOGRAPHIC DATA IN ALL MODELS  POOR CALIBRATION OF SURGE MODEL  IMPROPER APPLICATION OF INPUT DATA  INCONSISTENT ELEVATION DATA BETWEEN MODELS  OMISSION OF INPUT DATA  USE OF REGIONAL SURGE MODEL FOR A SMALL GEOGRAPHIC AREA WITH UNUSUAL TOPOGRAPHIC FEATURES MAY YIELD QUESTIONABLE SWEL RESULTS 31Rev 12-15-2008

32. 32Rev 12-15-2008

33. 33Rev 12-15-2008

34. 34

35. 35Rev 12-15-2008