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- The research upon which this publication is based was supported by funds provided by the United States Department of Interior, Office of Water Resources Research, as authorized under the Water Resources Research Act of 1964.1
- The research upon which this report is based was financed in part by the U.S. Department of the Interior, Washington, D.C., under the Mt. St. Helens Research and Development Program.1
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- Willamette Valley, Oregon, United States, (Hypsographic)3
- Oregon, Oregon, United States, (Administrative Boundary)2
- Baja California, Baja California, Mexico, (Administrative Boundary)1
- Coos Bay Estuary, Oregon, United States, (Hydrographic)1
- Crater Lake National Park, Oregon, United States, (Area)1
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