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
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
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
Bathymetry and topography Marquette Harbor, MI, 2011
Laser imagery Marquette Harbor, MI, 2011
Aerial photography NCMP 2012 West Harbor, OH
Hyperspectral imagery 1 m pixel resolution 36 spectral bands 375-1050 nm Near Laurence Harbor, NJ Post-Sandy 2012
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)
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
2004-2010 shoreline change rate (m/yr) 2010 beach width (m) 2010 dune height (m) Geomorphology -20 0 20 0 80 160 0 2 4
Inlets Channel Volume CY/yr Average Maximum Minimum 13,307 25,568 2,543 Volume Change (CY) Survey Total 6/2010--6/2004 6,932 6/2010--1/2006-89,785 2010--11/2004-65,302 1/2006--6/2004 147,968 1/2006--11/2004 292,443 11/2004--6/2004-163,402 New Pass, FL
Coastal land cover classification 20000 Beach Elevation Distribution Wetland Elevation Distribution 300000 18000 16000 14000 12000 250000 200000 150000 10000 8000 6000 4000 2000 0-1m 3.5m 100000 50000 0-1m 20m Landcover type Manning n Value 0.04 0.07 0.034 0.012 0.05 0.12 0.04 Percent Land Cover 20% 15% 10% 5% 0%
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 2 1 0.5 0 Dune Vegetation Area km 2 Low Density Medium Density High Density SAV Mangrove
2004-2010 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%
2010 dune vegetation density index Coastal engineering indices 2010 sav density index 2010 wetland density index combined environmental index 2010 impervious surfaces density index
Coastal engineering indices combined coastal engineering geomorphology index combined environmental index human use index 32% 90% 72% 60% 94% 97% 96% 73%
Coastal engineering indices combined coastal engineering geomorphology index combined environmental index human use index 32% 90% 72% 60% 94%
USACE Post-Sandy lidar
Questions? lauren.m.dunkin@usace.army.mil www.jalbtcx.org