82 



TABLE IV.1.4.— TYPICAL TIDAL CHARACTERISTICS OF THE ESTUARINE ZONE OF THE UNITED STATES 



Biophysical region 



Type of tide 



Tidal range (feet) 



Mean Spring Diurnal i 



Maximum Current 

 tidal velocity 

 flood ebb 



North Atlantic: 



Eastport, Maine (Bay of Fundy) Equal semidiurnal... 



Isle deHaut, Maine: (Penobscot Bay) do 



Portsmouth Harbor, N.H do 



Boston Harbor, Mass do 



Middle Atlantic: 



Dumpling Rocks (Buzzard Bay) do 



The Narrows (New York Harbor) do. 



Cape May Harbor, N.J do._- 



Virginia Beach, Va do 



Chesapeake Bay; 



Wolf Trap Light (lower bay) do 



Point No Point(midbay) do 



Chesapeake Bay Bridge, Maryland do 



Washington, D.C. (Potomac River) do 



South Atlantic: 



Wilmington, N.C.(Cape Fear River) do 



Savannah River entrance, Georgia do 



Mayport, Fla. (St. Johns River) do 



Fort Pierce Inlet, Fla do 



Caribbean: 



Miami Harbor, Fla _ do 



Key West, Fla do 



San Juan, P.R. do 



Christiansted, St. Croix Diurnal 



Gulf of Mexico: 



St. Petersburg, Fla. (Tampa Bay) do. 



Pensacola Bay entrance, Florida. do.. 



Barataria Bay, La do 



Aransas Pass, Tex ...do 



Pacific Southwest: 



Sen Diego Bay entrance, California.. Unequal semidiurnal. 



Monterey Bay, Calif do 



San Francisco Bay entrance, Califor- do 



nia. 

 Point Arena, Calif ...do — 



Pacific Northwest: 



Humboldt Bay entrance, California do — 



Yaquina Bay entrance, Oregon do.. 



Grays Harbor entrance, Washington do.. 



Puget Sound (Elliott Bay). Wash do 



Alaska: 



Juneau (Gastineau Channel) do 



Anchorage (Cook I niet) .do 



Goodnews Bay (Kuskokwim Bay) do.. 



Point Barrow .do 



Pacific Islands: 



Honolulu, Hawaii (Oahu).- .do 



Hilo, Hawaii (Hawaii) do 



Apra Harbor, Guam ...do.. 



Pago Pago Harbor, American Samoa do 



18.2 

 9.3 

 8.7 

 9.5 



3.7 



4.5 

 4.4 

 3.4 



1.0 



1.3 



.8 



2.9 



3.6 

 6.9 

 4.5 

 2.6 



2.5 

 1.3 



1.1 



3.9 

 3.5 

 4.0 



4.0 



4.5 

 5.9 

 6.9 

 7.6 



13.8 



25.1 



6.2 



.3 



1.2 

 1.6 

 (') 

 2.5 . 



20.7 

 10.7 

 10.0 

 11.0 



4.6 

 5.5 

 5.3 

 .1 



1.2 



1.5 



.9 



3.3 



3.9 

 8.1 

 5.3 

 3.0 



3.0 

 1.6 

 1.3 



0.8 



2.3 

 1.1 

 .9 

 1.7 



5.6 

 5.3 

 5.7 



5.8 



6.4 

 7.9 

 9.0 

 11.3 



16.4 



28.1 



8.9 



.4 



1.9 

 2.4 

 (») 



4.0 



3.5 

 1.6 

 1.4 

 2.0 



.9 

 2.0 

 2.1 

 1.3 



1.8 

 .5 



2.0 

 1.8 

 2.5 

 3.0 



2.2 

 1.2 

 (2) 

 (?) 



.3 

 1.8 

 1.7 

 1.6 



1.2 

 (2) 

 3.3 



1.3 



1.8 

 2.8 

 2.5 

 (2) 



2.3 

 3.3 

 2.6 

 (2) 



(») 

 («) 



3.5 

 1.7 

 2.1 

 1.5 



1.3 



2.3 



2.5 



.9 



2.2 

 .7 



1.0 

 .3 



1.7 

 3.0 

 3.5 

 3.5 



2.4 

 2.0 



(2) 



(0 



.3 

 2.1 

 1.7 

 1.0 



1.4 

 (0 

 3.9 



1.3 



2.3 

 2.6 

 2.2 

 (2) 



2.3 

 3.3 

 2.4 

 (0 



(') 

 (') 



3.4 



(') 



1 For an unequal semidiurnal tide, the diurnal range is the extreme range over the 2 sequential tides in slightly over 1 

 day. 



2 Weak and variable. 



3 No data. 



Reference: The National Estuarine Inventory. 

 Deta source: U.S. Coast and Geodetic Survey. 



