Hardened Shoreline Ecological Indicator GIS

Hardened shoreline structures near Ogden Dunes, Indiana
Hardened shoreline structures impacted by high water levels near Ogden Dunes, Indiana. (Image credit: Brandon Krumwiede, NOAA)

Understanding where hardened shorelines play a role in identifying opportunities for littoral system restoration is a critical aspect of prioritizing work in an anthropomorphic system. While this need has been recognized as a priority in the Great Lakes, there previously was no way to document these changes.

This multiagency project used existing aerial imagery and ancillary data to classify segments of the U.S. Great Lakes shoreline as either artificial or natural, along with structure type and condition. These data helped to enhance coastal communities' understanding of unintended consequences and recognition of potential systemic issues related to shoreline armoring. Data can be used to improve modeling efforts, evaluate projects for future climate resilience, and prioritize Great Lakes Restoration Initiative funding decisions each year. It is publicly accessible on NOAA’s Digital Coast. The next round of funding will be used to update the 2019 products to represent the current status of hardened shorelines.

Hardened shoreline change map
More than 6,800 miles of shoreline change were analyzed, and over 27,000 hardened shoreline features were identified and classified. Twenty-two percent or one-fifth of the U.S. Great Lakes shoreline was classified as artificial or hardened by coastal infrastructure. (Image credit: NOAA Office for Coastal Management)

Funding:
FY 2024: $450,000

FY 2019: $100,000

FY 2018: $400,000

Contact: Brandon.Krumwiede@noaa.gov

Partners: U.S. Army Corps of Engineers, U.S. Geological Survey