Atlantic seaboard watershed

{{Infobox landform

| name = Atlantic Seaboard

| map_image = NorthAmerica-WaterDivides.png

| map_size = 330px

| map_caption = The Atlantic Seaboard Watershed extends southward along the Atlantic Ocean from Nova Scotia to Florida

| location = Canada and the United States

| area_total_sq_mi = 277,000

}}

The Atlantic seaboard watershed is a watershed of the Atlantic Ocean in eastern North America along the Atlantic Canada (Maritimes) coast south of the Gulf of Saint Lawrence Watershed, and the East Coast of the United States north of the Kissimmee River watershed of Lake Okeechobee basin in the central Florida Peninsula.

The continental area east of the Appalachian Mountains and highlands to the north and south is demarcated on the south by drainage to the Lake Okeechobee basin (which drains both westward to the Gulf and eastward to ocean), the Eastern Continental Divide (ECD) to the west, and the Saint Lawrence divide to the north. US physiographic regions of this watershed are the Atlantic Plain and the Appalachian Mountains & Highlands.

;Sub-watersheds adjacent to the Saint Lawrence divide:

Chedabucto Bay: {{convert|2148|sqmi|km2}}{{cite web|url=http://www.mar.dfo-mpo.gc.ca/science/ocean/ceice/Inlets/ChedabuctoBay2.htm |title=Chedabucto Bay |accessdate=2010-04-10 |url-status=dead |archiveurl=https://web.archive.org/web/20110706181630/http://www2.mar.dfo-mpo.gc.ca/science/ocean/ceice/Inlets/ChedabuctoBay2.htm |archivedate=2011-07-06 }}
Gulf of Maine: {{convert|69115|sqmi|km2}}
Long Island Sound: {{convert|16246|sqmi|km2}}
Lower New York Bay: >{{convert|14000|sqmi|km2}}{{Clarify|post-text= - The 14000 value is just the Hudson River drainage|date=December 2009}}

;Other notable sub-watersheds:

Delaware Bay: {{convert|14119|sqmi|km2}}{{Clarify|post-text= - The 14119 value is just the Delaware River drainage|date=December 2009}} — larger than several, but not adjacent to either divide

Chesapeake Bay: {{convert|64299|sqmi|km2}} — adjacent to both divides (at the [http://geonames.usgs.gov/pls/gnispublic/f?p=127:3:1123659760449078::NO::P3_FID,P3_TITLE:1201370%2CTriple%20Divide Triple Divide] point)

;Sub-watersheds adjacent to the Eastern Continental Divide:

Albemarle Sound: >{{convert|14380|sqmi|km2}}{{Cite web |url=http://www.deq.state.va.us/vrrbac/pdf/rrbpaper.pdf |title=Archived copy |access-date=2010-08-10 |archive-url=https://web.archive.org/web/20110718031355/http://www.deq.state.va.us/vrrbac/pdf/rrbpaper.pdf |archive-date=2011-07-18 |url-status=dead }}{{Specify|reason=The Chowan River drainage is 4800 and the Roanoke River infobox doesn't have drainage area|date=December 2009}}
Winyah Bay: >{{convert|7221|sqmi|km2}}[http://www.ee.enr.state.nc.us/public/ecoaddress/riverbasins/yadkin.pdf]{{dead link|date=October 2016 |bot=InternetArchiveBot |fix-attempted=yes }}{{Specify|The Pee Dee River infobox doesn't have drainage area|date=December 2009}}
Santee River: >{{convert|4531|sqmi|km2}}{{Cite web |url=http://www.scdhec.gov/environment/water/shed/santee_main.htm |title=Bureau of Water -- Outreach |access-date=2010-08-10 |archive-url=https://web.archive.org/web/20100603013011/https://www.scdhec.gov/environment/water/shed/santee_main.htm |archive-date=2010-06-03 |url-status=dead }}{{Specify|reason=the Santee River infobox doesn't have drainage area|date=December 2009}}
Savannah River: {{convert|9850|sqmi|km2}}
St. Johns River: {{convert|8840|sqmi|km2}}
Biscayne Bay: >{{convert|2800|sqmi|km2}}{{Clarify|post-text= - The 2800 value is just the Miami River drainage|date=January 2010}}
Kissimmee River: {{convert|3000|sqmi|km2}}

References