Coastal Engineering Indices to Inform Regional Management

Transcription

1 Coastal Engineering Indices to Inform Regional Management Lauren Dunkin FSBPA 14 February 2013 Outline Program overview Standard products Coastal Engineering Index Conclusion and future work US Army Corps of Engineers

2 National Coastal Mapping Program Goals Develop regional, repetitive, highresolution, high-accuracy elevation and imagery data Build an understanding of how the coastal zone is changing Facilitate management of sediment and projects at a regional, or watershed scale Marquette Harbor, MI, Lake Superior, 2011

3 National Coastal Mapping Progress Number of times surveyed since 2004 One Time Two Times Three Times Four Times Five Times Six Times Products ASCII XYZ Aerial photos Zero contour Aerial photo mosaics 1-meter bathy/topo DEM LAS format topo 1-meter bathy/topo bare earth DEM Hyperspectral image mosaics Laser reflectance images Basic landcover classification Volume change

4 Bathymetry and topography Marquette Harbor, MI, 2011

5 Laser imagery Marquette Harbor, MI, 2011

6 Aerial photography NCMP 2012 West Harbor, OH

7 Hyperspectral imagery 1 m pixel resolution 36 spectral bands nm Near Laurence Harbor, NJ Post-Sandy 2012

8 Indices Coastal vulnerability index (USGS) Coastal vulnerability index Coastal condition index Environmental sensitivity index Sarasota tidal creek condition index Coastal marsh health index Coastal condition index (EPA)

9 Coastal engineering indices Geomorphology Dune height Beach width Shoreline change Inlets Ebb shoal volume change Structure dimensions relative to design Navigability Environment Dune vegetation density Wetland density Submerged aquatic vegetation density Human use Impervious surface density

10 shoreline change rate (m/yr) 2010 beach width (m) 2010 dune height (m) Geomorphology

11 Inlets Channel Volume CY/yr Average Maximum Minimum 13,307 25,568 2,543 Volume Change (CY) Survey Total 6/ /2004 6,932 6/ / , / ,302 1/ / ,968 1/ / ,443 11/ / ,402 New Pass, FL

12 Coastal land cover classification Beach Elevation Distribution Wetland Elevation Distribution m 3.5m m 20m Landcover type Manning n Value Percent Land Cover 20% 15% 10% 5% 0%

13 Critical Habitat Detection Wetlands, SAV and Dune Vegetation Critical Habitat Summary: Mangrove and Forested Wetland Area: 2.18km 2 SAV Area: 5.72km 2 Dune Vegetation Density Area: Low: 0.75km 2 Medium: 0.28km 2 High: 0.12km Dune Vegetation Area km 2 Low Density Medium Density High Density SAV Mangrove

14 shoreline change rate index Coastal engineering indices 2010 dune height index 2010 beach width index Combined geomorphology index 32% 90% 72% 60% 94% 97% 96% 73%

15 2010 dune vegetation density index Coastal engineering indices 2010 sav density index 2010 wetland density index combined environmental index 2010 impervious surfaces density index

16 Coastal engineering indices combined coastal engineering geomorphology index combined environmental index human use index 32% 90% 72% 60% 94% 97% 96% 73%

17 Coastal engineering indices combined coastal engineering geomorphology index combined environmental index human use index 32% 90% 72% 60% 94%

18 USACE Post-Sandy lidar

19 Questions?