ECOncrete Scour Protection: Fisheries and Biodiversity Research Project
Objectives
The project evaluates the effects of ecologically-engineered scour protection on marine biodiversity and fish populations compared to traditional scour protection methods.
Short description
In 2022, the company ECOncrete, in coordination with the New York State (NYS) Department of Environmental Conservation, deployed over 4,500 nature-inclusive design (NID) scour protection units at the Twelve Mile ReefThe Twelve Mile Reef testing site is located in the Atlantic Ocean, 12.0 nautical miles from Moriches and Shinnecock Inlets and extends for 850 acres (2025 yards x 2025 yards) wide, and 123 to 143 feet deep. , an offshore test site off Long Island, New York. They also deployed rock material to compare the results. Manufactured locally, the scour protection units were installed following standard offshore wind installation procedures. Overall, the project aims to better understand the effects of offshore wind scour protection on benthic habitats and fish communities.
In October 2023, a few months after the installation of the scour protection, research teams from Stony Brook University, in collaboration with ECOncrete and the New York State Energy Research and Development Authority (NYSERDA), initiated a 12-month biological monitoring plan that included environmental DNA (eDNA) analysis and high-resolution multi-beam mapping. Since black sea bass is a key species in the local ecosystem, its habitat and community modelling were also part of the monitoring plan. The scientific monitoring assessed biological growth within the scour protection system and surrounding seabed environments, with a focus on changes in fish population and diversity associated with the scour protection units.
The ecological study results 18 months post-deployment revealed that the system enhanced habitat potential for local species and improved the biological function of both the scour protection and its surroundings, resulting in increased biodiversity compared to control sites. Data from multi-beam surveys, taken 13 months apart and including all 2024 storm events, showed no movement of the ECOncrete units. This data aligned with the results from the 3D physical model tests conducted at the Coastal & Ocean Basin (COB) from Gent University on a moveable (sandy) seabed.
Based on these results, the project has clear sustainable benefits and provides the offshore wind supply chain with validated, locally-sourced, NID scour protection. These structures not only reduce the ecological footprint of offshore wind infrastructure on the marine ecosystem, but also benefits the fish population in the surrounding area.