Natural features, including dunes, reefs, and wetlands. (2) Nature-based features, including beach nourishment, dune restoration, wetland and other coastal habitat restoration, and living shoreline construction. (3) Nonstructural measures, including flood proofing of structures, flood warning systems, and elevated development. 6. Catalog of research on applicable coastal risk reduction and resilience measures (a) In general Not later than 1 year after the date of enactment of this Act, the Secretary, acting through the Administrator, shall— (1) identify all Department of Commerce research activities regarding applicable coastal risk reduction and resilience measures