to the National Atlas Home page
About | Fact Sheets | Contact Us | Partners | Products | Site Map | FAQ | Help | Follow us on Twitter 
Part of Project LogoAgricultureBiologyBoundariesClimateEnvironmentGeologyGovernmentHistoryMappingPeopleTransportationWater
to the Interactive Map MakerMap LayersPrintable MapsWall MapsDynamic MapsArticlesMapping Professionals





 
Water
Map Maker
Realtime Streamflow Stations
Streams and Waterbodies
Map Layer
Realtime Streamflow Stations
Streams and Waterbodies
Dynamic Maps
Streamer
Articles
Realtime Streamflow Stations

Boundaries
Printable Maps
Reference and Outline Maps of the United States
Wall Maps
General Reference
 

Article

  Surface Water

 

   
 

River
Reach on the Ninilchik River.
Photo by R. T. Ourso, U.S. Geological Survey
Creek
Costello Creek in the northern Susitna River Basin.
Photo by T. P. Brabets, U.S. Geological Survey
Lake
Yellowstone Lake in Yellowstone National Park.
Photo by G. K. Boughton, U.S. Geological Survey

 

Rivers, streams, lakes, and reservoirs—these are all features in the landscape that contain water flowing on the earth's surface. Rivers and streams carry flowing water whereas as lakes, wetlands, and reservoirs hold or store water. Regardless of their role in the landscape, these features are all surface water resources that are replenished by precipitation. Rain falling on the land surface that does not seep into the ground becomes runoff, which flows into rivers, streams, or lakes. The land area that drains water to a particular river, stream, or lake is called a watershed, which can be identified on a map by tracing a line along the highest elevations, generally a ridge, between two areas on a map. Cypress Knees
Cypress Knees.
Photo by D. K. Demcheck, U.S. Geological Survey
Large watersheds, like the Mississippi River basin, contain thousands of smaller watersheds that drain small creeks or streams, all of which drain to the Mississippi River.

About 80 percent of the total freshwater that we use daily comes from surface water. In 2005, the estimated amount of surface water withdrawal in the United States was 328 billion gallons per day. Most of this water was used for irrigation and public supplies. Because surface water plays such a vital role in our lives, it is important to have accurate measures of streamflow to determine stream stage and discharge over time. The U.S. Geological Survey collects and analyzes streamflow data for thousands of streams across the Nation to provide accurate and timely information about the availability and variability of surface water flow.

  back to top