U.S. Geological Survey 2010 vector digital data Portland, OR U.S. Geological Survey https://water.usgs.gov/lookup/getspatial?umpqua_River_Oregon_Geologic_Floodplain J. Rose Wallick Jim E. O'Connor Scott Anderson Mackenzie Keith Charles Cannon John Risley 2010 document Wallick, J.R., O'Connor, J.E., Anderson, Scott, Keith, Mackenzie, Cannon, Charles and Risley, John, 2010, Channel change and bed-material transport, Umpqua River, Oregon: U.S. Geological Survey Open-File Report 2010-1314. https://pubs.usgs.gov/of/2010/1314/ The Umpqua River drains 12,103 square kilometers (4,673 square miles) in southwest Oregon before flowing into the Pacific Ocean at Winchester Bay near the city of Reedsport. In cooperation with the Portland District of the U.S. Army Corps of Engineers (USACE), the USGS evaluated sediment transport and gravel storage along the downstream alluvial reaches of the North and South Umpqua Rivers and the entire mainstem Umpqua River. This includes the lower 46.8 kilometers (29.1 miles) of the North Umpqua River and the lower 122.6 kilometers (76.2 miles) of the South Umpqua River. The Umpqua River gravel transport study involved multiple analyses, including tracking patterns of historical channel change and estimation of a sediment budget. To support these analyses, digital channel maps were produced to depict channel and floodplain conditions along the Umpqua River system from different time periods. GIS layers defining the active channel of the Umpqua River system were developed for three time periods: 1939, 1967, and 2005. For the South Umpqua River and the 19 kilometers (12 miles) of the mainstem Umpqua River downstream from the confluence of the North and South Umpqua Rivers, GIS layers were also developed for the time periods 1994, 2000, and 2009. For this project, the active channel was defined as area typically inundated during annual high flows, and includes the low-flow channel as well as side channels, islands, and channel-flanking gravel bars. The active channel datasets were developed by digitizing from aerial photographs. Aerial photographs from 1939 and 1967 were scanned, rectified, and mosaiced for this project. Digital orthophotographs from 1994, 2000, 2005, and 2009 are publicly available (See metadata for each photograph set for more information on the rectification process and resolution of each dataset). Although our study area encompasses the Umpqua River and lower reaches of the North and South Umpqua Rivers, the extent of each dataset depended upon the underlying aerial photographs; for example, the 1967 photographs extend only as far downstream as floodplain kilometer 7, whereas the 1939 and 2005 datasets extend to the mouth of the Umpqua River at the Pacific Ocean. These data were created to support the evaluation of sediment transport and gravel storage in the alluvial reaches of the Umpqua River system, Oregon. This mapping was used to track changes in channel morphology over time and to measure changes in gravel bar area and channel position. 2010 publication date Complete None planned -124.222764 -122.870956 43.756118 42.920038 USGS Thesaurus inlandWaters fluvial geomorphology active channel sediment transport ISO 19115 Topic Category geoscientificInformation inlandWaters environment USGS Metadata Identifier USGS:438a108a-7dd3-49c1-ae28-9a6b2dcc589d Geographic Names Information System Umpqua River Oregon Douglas County None The U.S. Geological Survey should be acknowledged as the data source in products derived from these data. U.S. Geological Survey Charles Cannon Hydrologic Technician mailing address

2130 SW 5th Avenue

Portland OR 97201 USA (503) 251-3273 (503) 251-3470 ccannon@usgs.gov (Warning: Although accurate at the time of production, this information may have become obsolete. See the Metadata_Reference_Information section for a current contact.) https://water.usgs.gov/GIS/browse/Umpqua_River_Oregon_Geologic_Floodplain.jpg Illustration of data set JPEG Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850 This floodplain delineation includes occasional topographic highs that are well above the local maximum floodplain elevation. This mapping is a reference frame for geomorphic analyses, and should not be interpreted as a floodplain hazard map or delineation of actual historical flood boundaries. This product should not be used for planning or insurance purposes. This floodplain delineation includes topographic highs that are well above the local maximum floodplain elevation. Where possible, these areas of elevated relief were omitted from the floodplain, but in some instances, such as at Bolon Island near Reedsport, the elevated areas are within the bounds of the active channel, and were included in the floodplain delineation. NAIP imagery from 2005 was used to verify that the mapping was reasonable. We define the geologic floodplain as the geomorphic surface that is actively accumulating sediment through occasional overbank deposition. Areas within the geologic floodplain are considered to be formed during the recent (Holocene-epoch) climatic regime. The floodplain extent includes most Quaternary deposits mapped in Ma and others (2009) and Wells and others (2000). This mapping is not intended to include Pleistocene surficial deposits. The floodplain was interpreted and digitized at a scale of 1:10,000 U.S. Department of Agriculture, Natural Resources Conservation Service 20090812 vector digital data Fort Worth, Texas U.S. Department of Agriculture, Natural Resources or649 http://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm online 19971112 20090812 ground condition SSURGO Soil survey used to identify floodplain soils Surdex Corporation, Chesterfield, MO 2006 remote-sensing image aerial photography 20050717 20050804 ground condition NAIP 2005 Used as a check to verify floodplain delineation was reasonable. U.S Geological Survey Unknown 24,000 stable-base material 1985 1990 publication date Quadrangles, 24k Topographic contours used as an elevation guide U.S. Geological Survey 2009 raster digital data National Elevation Data (NED) 0.1 Sioux Falls, SD U.S. Geological Survey http://nationalmap.gov/viewer.html 24,000 online 1999 2009 ground condition NED Elevation used to determine changes in slope. Compiled by Lina Ma, Ian P. Madin, Keith V. Olson, and Rudie J. Watzig, Oregon Department of Geology and Mineral Industries 2009 5 vector digital data OGDC v5 Portland, OR Oregon Department of Geology and Mineral Industries Technical assistance by Ray E.Wells, U.S. Geological Survey; Alan R. Niem, Oregon State University; and George R. Priest, Oregon Department of Geology and Mineral Industries Additional help by Darrick E. Boschmann, Marie W. Brophy, Christina L. Furnari, Olivia L. Miller, Luke M. Raymond, and Josh I. Thuele. CD-ROM 2009 publication date OGDC-5 Geologic map used to identify Quaternary alluvial units R.E. Wells A.S. Jayko A.R. Niem G. Black T. Wiley E. Baldwin K.M. Molenaar K.L. Wheeler C.B. DuRoss R.W. Givler 2000 1.0 vector digital data U.S. Geological Survey Open File Report 00-376 Menlo Park, CA U.S. Geological Survey http://geopubs.wr.usgs.gov/open-file/of00-376/ 100,000 online 2000 publication date Wells and others, 2000 Geologic map used to identify Quaternary alluvial units The floodplain was digitized at a scale of 1:10,000. Floodplain boundaries were determined using slope breaks interpreted from the National Elevation Dataset digital elevation model and generally follow the base of hill slopes. The boundaries were adjusted to follow maximum elevations of floodplain soils from the Natural Resources Conservation Service Soil Survey Geographic (SSURGO) database using contours from digital USGS topographic maps. At tributary junctions, the floodplain boundaries are truncated to follow the course of the Umpqua River floodplain, and except for the North Umpqua River and South Umpqua River, the boundaries do not extend along tributary valleys. SSURGO NAIP 2005 NED OGDC-5 Wells and others, 2000 Quadrangles, 24k 2009 Vector G-polygon 2 Universal Transverse Mercator 10 0.999600 -123.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000100 0.000100 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Umpqua_River_geologic_floodplain Geomorphic surface that is actively accumulating sediment through occasional overbank deposition U.S. Geological Survey OBJECTID Internal feature number. ESRI Positive real numbers that are automatically generated. SHAPE Feature geometry. ESRI Coordinates defining the features. Location River whose floodplain is represented U.S. Geological Survey North Umpqua Floodplain of North Umpqua River U.S. Geological Survey Mainstem and South Umpqua Floodplain of Umpqua and South Umpqua Rivers U.S. Geological Survey SHAPE_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. Shape_Area Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. U.S. Geological Survey Michael Ierardi IT Specialist mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov Downloadable Data Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. ESRI Geodatabase Feature Class PKZIP compression Winzip 1000 https://water.usgs.gov/GIS/dsdl/ofr2010-1314/Umpqua_River_geomorphology_study.zip None. This dataset is provided by USGS as a public service. 20201117 U.S. Geological Survey Michael Ierardi IT Specialist mailing and physical address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998