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Sprague River Oregon Centerline South Fork 1940

Dates

Publication Date
Time Period
1940
File Modification Date
2017-04-27 20:37:02

Citation

U.S. Geological Survey, 20091030, Sprague River Oregon Centerline South Fork 1940: U.S. Geological Survey.

Summary

The Sprague River drains 4090 square kilometers in south-central Oregon before flowing into the Williamson River and upper Klamath Lake. In cooperation with the U.S. Fish and Wildlife Service, the USGS and University of Oregon conducted a study to evaluate channel and floodplain processes for the 131 km of the Sprague River and its major tributaries, including the lower 20 km of the South Fork Sprague River, the lower 16 km of the North Fork Sprague River, and the lower 62 km of the Sycan River. The study involved multiple analyses, including assessments of historical channel change, riparian and floodplain vegetation, and surficial geology. To support these analyses, digital floodplain and channel maps were prepared from historic [...]

Contacts

Point of Contact :
Tana Haluska
Originator :
U.S. Geological Survey
Metadata Contact :
U.S. Geological Survey
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey

Attached Files

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spragueriveroregon_centerline_s_fork_1940.xml
Original FGDC Metadata

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16.84 KB

Purpose

These data were created to support understanding of geomorphic conditions and historical changes to channel and floodplain conditions for the Sprague River and the lower portions of its major tributaries. GIS layers depicting channel centerlines, water features, fluvial bars, floodplain vegetation, and floodplain features such as irrigation canals, levees and dikes, and roads were created from aerial photographs dating from 1940, 1968, and 2000. The purpose of this mapping was to track changes in channel and floodplain morphology and vegetation over time and to measure changes in channel position. Historical aerial photographs from 1940 and 1968 were acquired, scanned, and rectified for this project, while digital orthophotographs from 2000 are publicly available. (See metadata for each photograph set for more information on the rectification process and resolution of each dataset). In addition, channel centerlines were mapped from publicly available coverages for 1975 (Natural Resources Conservation Service Soil Survey of Klamath County) and 2005 (U.S. Department of Agriculture NAIP imagery). The surficial geologic mapping was done to support understanding of the geologic context of the modern floodplain, and encompasses the alluvial valleys of the Sprague River and the lower portions of the Sycan, North Fork, and South Fork Sprague Rivers.
Illustration of data set
Illustration of data set

Map

Communities

  • USGS Water Resources NSDI Node

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Additional Information

Identifiers

Type Scheme Key
processingUrl https://water.usgs.gov/GIS/metadata/usgswrd/XML/spragueriveroregon_centerline_s_fork_1940.xml

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