Fig. 1: Location of study sites in North America and dams in the USA.
From: Coastal sedimentation across North America doubled in the 20th century despite river dams

Most larger dams (green and magenta) are located inland from the coastal plain (yellow) and were constructed after 1950. Dam information from the Army Corps of Engineers National Inventory of Dams15. (1) Nastapoka Sound, Hudson Bay, Canada, (2) Pettaquamscutt River Basin, RI, USA, (3) Jamaica Bay, NY, USA, (4) New York Bight, NY, USA, (5) Pocomoke Sound, Chesapeake Bay, VA, USA, (6) Albemarle Sound, NC, USA, (7) Pamlico River Estuary, NC, USA, (8) Neuse River Estuary, NC, USA, (9) Florida Bay, FL, USA, (10) Mobile Bay, AL, USA, (11) Inner-Continental Shelf B, LA, USA, (12) Inner-Continental Shelf E, LA, USA, (13) Barataria Bay, LA, USA, (14) Terrebonne Bay, LA, USA, (15) Atchafalaya Delta, LA, USA, (16) Sabine Lake, TX, USA, (17) Galveston Bay, TX, USA, (18) Corpus Christi Bay, TX, USA, (19) Sagua Estuary, Cuba, (20) Cienfuegos Bay, Cuba, (21) Gulf of Tehuantepec, Mexico, (22) Culiacan River Estuary, Mexico, (23) Santa Clara Shelf, CA, USA, (24) San Francisco Bay, CA, USA, (25) Pacific Northwest Margin, OR, USA. See Supplementary Data 1 and Supplementary Note 1 for details on each site.