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Open-File Report 2015–1047

Prepared in cooperation with the Trinity River Restoration Program

Geomorphic Mapping to Support River Restoration on the Trinity River Downstream from Lewiston Dam, California, 1980–2011

By Jennifer A. Curtis and Timothy M. Guerrero

Thumbnail of and link to report PDF (6.8 MB)Abstract

Historic land use, dam construction, water storage, and flow diversions in the Trinity River watershed have resulted in downstream geomorphic change, loss of salmonid habitat, and declines in salmonid populations. The USGS in cooperation with the Trinity River Restoration Program, a multi-agency partnership tasked with implementing federally mandated restoration, completed a geomorphic change assessment to inform the planning process for future restoration work. This report documents an ARCMAP geodatabase (v.10.0) containing geomorphic features digitized from a series of rectified orthophotographs ( Upland, riparian, and channel features were digitized from six available base images (1980, 1997, 2001, 2006, 2009, and 2011). This report describes the structure of the geodatabase and the methods used to delineate individual geomorphic features.

First posted May 13, 2015

Database of Geomorphic Features

  • Scientific Investigations Report 2015–5046
    Curtis, J.A., Wright, S.A., Minear, J.T., and Flint, L.E., 2015, Assessing geomorphic change along the Trinity River downstream from Lewiston Dam, California, 1980–2011: U.S. Geological Survey Scientific Investigations Report 2015–5046, 69 p., plus appendix,

For additional information, contact:
Director, California Water Science Center
U.S. Geological Survey
6000 J Street, Placer Hall
Sacramento, California 95819

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Suggested citation:

Curtis, J.A., and Guerrero, T.M., 2015, Geomorphic mapping to support river restoration on the Trinity River downstream from Lewiston Dam, California, 1980–2011: U.S. Geological Survey Open-File Report 2015–1047, 15 p.,

ISSN 2331-1258 (online)




Purpose and Scope

Study Area

Geomorphic Mapping Geodatabase

References Cited

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