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Spatial Information for Designing a Shoreline

Georgasmodel-620x4111Physical Forces Impacting the Hudson River Shoreline

Many factors need to be considered in shoreline management decisions.  There are a lot of geospatial data resources available to help better understand the characteristics of a site and the physical forces that impact the site.  These resources can inform the choice of appropriate shoreline management techniques and improve decision making.

The Hudson’s shorelines are subject to a wide variety of complex and interacting physical stresses, including ship wakes, wind-driven waves, ice, storm surge, and currents. These have not been systematically measured or characterized throughout the Hudson.

These forces exert pressure and movement of the soil, resulting in erosion of the shoreline. In order to implement an effective shoreline stabilization method, it is important to take into account the level of stressors (wakes, currents, ice, etc.) occurring at any location.

Stevens Institute of Technology has advanced our understanding of these forces through a combination of historic studies, direct measurements, and modeling of current and wind wave energy. This work advances our understanding of present conditions that shoreline protection will need to withstand.

Hudson River Ice Climatology Data – Observed ice occurrence, estimated thickness and area, and ice type, based on daily ice reports by the US Coast Guard from 2004 to 2015 (compiled by Georgas, Miller, and D’Agostino from the Stevens Institute of Technology). The Tidal Hudson River Ice Cover Climatology explains the methodology and results of the climatological and statistical analyses for the ice distributions of ice thickness and ice cover as well as ice types on the Hudson River Estuary.

Physical Forces Data – Includes data and statistics for water levels, currents, surface wind-waves, and other parameters (Georgas and Miller, Stevens Institute of Technology).

Physical Forces Methodology – An analysis of the physical forces impacting the shorelines of the Hudson River Estuary was completed by Stevens Institute of Technology to provide critical but often lacking information about several of the parameters required for the proper design of ecologically enhanced shoreline stabilization projects.

Wake Data  An analysis of the wake climate within the Hudson River was undertaken by Stevens Institute of Technology as a part of the ongoing Hudson River Sustainable Shorelines Project. The primary objective of the wake study was to document vessel traffic and the resulting wakes along the Hudson River; with the intent of ultimately using this information to more adequately understand the erosion potential of wakes.

Engineering:

Bathymetry and Benthic Mapping – A grid showing elevation in meters of the floor of the Hudson River Estuary.

Topography LiDAR – Geotiff images of contours; however, digital elevation models (DEMs) permit pseudo-3-D displays. LiDAR information was collected in 2012. Data are intended for use in coastal management decision making.

Natural Resources:

Shoreline Types – Polyline showing shoreline types for the tidal Hudson River Estuary shoreline from the Tappan Zee Bridge north to Troy.

SAV (Hudson River Estuary Documented Submerged Aquatic Vegetation) – Polygons showing extent of submerged aquatic vegetation (water celery and water chestnut) in the Hudson River Estuary; there are separate coverages for 1997, 2002, and 2007.

Hudson River Tidal Wetlands – The NYSDEC Hudson River Estuary Program in collaboration with numerous partners has supported the mapping of vegetated habitats of the Hudson River Estuary. This data set contains polygons showing the distribution of tidal wetlands from Hastings-on-Hudson to Troy. Data were interpreted from an aerial photo inventory acquired in 2007.

Significant Coastal Fish and Wildlife Boundaries – Boundaries of Significant Coastal Fish and Wildlife Habitats as identified by NYS Department of State, Division of Coastal Resources for the purposes of the State’s Coastal Management Program.

New York Harbor Observing and Prediction System (NYHOPS) – Provides meteorological and oceanographic conditions both in real-time and forecasted out to 72 hours in the Hudson River, the East River, NY/NJ Estuary, Raritan Bay, Long Island Sound and the coastal waters of New Jersey. Graphic images are available of water level; surface and bottom temperature; surface and bottom salinity; surface and bottom currents; NOAA winds; coastal waves – height, period and direction; CDOM (Chromophoric Dissolved Organic Matter). See: http://hudson.dl.stevens-tech.edu/maritimeforecast/

Sea Level Rise:

Sea Level Rise Mapper – The Sea Level Rise Mapper is a tool for communities and stakeholders to create visualizations of future scenarios of sea level rise.The data and mapping products displayed on this site are a combination of results from new analyses by Scenic Hudson and existing data from a variety of sources including NYS DEC, US EPA, US Census Bureau, Dr. Roger Flood (SUNY Stony Brook) and FEMA.  Data layers include submerged aquatic vegetation, shoreline types and tidal wetlands.

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