Stream Geomorphology

Regional Hydraulic Geometry Curves are log-log plots comparing channel dimensions (top width, mean depth, and cross-sectional area) at 'bankfull' or effective discharge (usually between the 1.1 and 1.9 year return interval) versus drainage area.
The National Water Management Center (NWMC) is working with other Federal, State, and Local agencies to develop Regional Hydraulic Geometry Curves across the country. We are organizing data by Physiographic Provinces (see map below). If you have data you would like to contribute and/or a link to a webpage you would like us to add, please contact us by clicking on the webmaster link.

Physiographic Map of Contingeous United States
Physiographic Map - Click on Image for larger version (182 KB)

Physiographic Map Reference: Fenneman, Nevin M., 1946, Physical Divisions of the United States: U.S. Geological Survey, scale 1:7,000,000.




























NOTE: click on SECTION links to view regional curves or click on SITES links to view information on individual sites. 
Laurentian Upland
1. Superior Upland
Atlantic Plain
2. Continental Shelf
3. Coastal Plain
a. Embayed Section
b. Sea Island Section
c. Floridian Section
d. East Gulf Coastal Plain
e. Mississippi Alluvial Plain
f. West Gulf Coastal Plain
Appalachian Highlands
4. Piedmont Province
b. Piedmont Lowlands
5. Blue Ridge Province
a. Northern Section
6. Valley and Ridge Province
a. Tennessee Section
b. Middle Section
c. Hudson Valley Section
7. St. Lawrence Valley
a. Champlain Section
b. Northern Section
8. Appalachian Plateaus
a. Mohawk Section
b. Catskill Section
c. Southern New York Section
d. Allegheny Mountain Section
e. Kanawha Section
f. Cumberland Plateau Section
g. Cumberland Mountain Section
9. New England Province
a. Seaboard Lowland Section
c. White Mountain Section
d. Green Mountain Section
e. Taconic Section
10. Adirondack Province
Interior Plains
11. Interior Low Plateaus
a. Highland Rim Section
b. Lexington Plain
c. Nashville Basin
12. Central Lowland
a. Eastern lake Section
b. Western lake Section
c. Wisconsin Driftless Section
d. Till Plains
e. Dissected Till Plains
13. Great Plains Province
a. Missouri Plateau, glaciated
b. Missouri Plateau, unglaciated
c. Black Hills
d. High Plains
e. Plains Border
f. Colorado Piedmont
g. Raton Section
h. Pecos Valley
i. Edwards Plateau
j. Central Texas Section
Interior Highlands
14. Ozark Plateaus
b. Boston "Mountains"
a. Arkansas Valley
b. Ouachita Mountains
Rocky Mountain System
16. Southern Rocky Mountains
17. Wyoming Basin
18. Middle Rocky Mountains
19. Northern Rocky Mountains
Intermontane Plateaus
20. Columbia Plateaus
a. Walla Walla Plateau
b. Blue Mountain Section
c. Payette Section
d. Snake River Plain
e. Harney Section
21. Colorado Plateaus
a. High Plateaus of Utah
b. Uinta Basin
c. Canyon Lands
d. Navajo Section
e. Grand Canyon Section
f. Datil Section
22. Basin and Range Province
a. Great Basin
b. Sonoran Desert
c. Salton Trough
d. Mexican Highlands
e. Sacramento Section
Pacific Mountain System
23. Cascade-Sierra Mountains
a. Northern Cascade Mountains
b. Middle Cascade Mountains
c. Southern Cascade Mountains
d. Sierra Nevada
24. Pacific Border Province
a. Puget Trough
b. Olympic Mountains
c. Oregon Coast Range
d. Klamath Mountains
e. California Trough
f. California Coast Ranges
g. Los Angeles Range
25. Lower Californian Province


Within the procedure information page you will find information on site selection and site survey process used by the National Water Management Center.


The glossary page contains definitions and references for many of the terms used in geomorphology and the development of Regional Hydraulic Geometry Curves.


Within the links page you will find links to similar web pages on regional hydraulic geometry curves and other hydrology and geomorphology pages.