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The U.S. Geological Survey's Streamer application allows users to explore where their surface water comes from and where it flows to. By clicking on any major stream or river, the user can trace it upstream to its source(s) or downstream to where it joins a larger river or empties into the ocean.
The EDNA Watershed Atlas contains watershed characteristics for major named rivers of the contiguous U.S. including maps, images, legends, and statistics derived from the EDNA Watershed Characteristics model.
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Surface water, like rivers and lakes, as well as groundwater have flows that change all the time. The USGS maps and measures water to help understand the environment and how water moves through it. Maps are important tools in understanding water resources, conditions, and issues.
The map shows major rivers (Strahler stream orders >4) of the continental United States and 2-digit hydrologic code boundaries (hydrologic regions).
17 wrz 2024 · Students trace the Mississippi River and its major tributaries on a map of the United States. They use an interactive map or atlases to locate other major rivers and identify the major U.S. watersheds.