U.S. Geological Survey 20091030 vector digital data Portland, OR U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?spragueriveroregon_floodplain_2000 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 notes, maps, and aerial photos to depict channel and floodplain conditions at different times between 1866 and 2005. The geospatial database of current and historic channel and floodplain conditions will also enable evaluation of long-term trends pertaining to aquatic and riparian habitat conditions. 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. 2000 ground condition Complete None planned -121.874809 -121.081355 42.615368 42.433240 None geomorphology channel analysis floodplain analysis inlandWaters None Sprague River Oregon Klamath Basin None The U.S. Geological Survey and the University of Oregon should be acknowledged as the data source in products derived from these data. Tana Haluska U.S. Geological Survey Geographer mailing address

2130 SW 5th Avenue

Portland OR 97201 USA 503-251-3212 N/A 503-251-3470 thaluska@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.) http://water.usgs.gov/GIS/browse/spragueriveroregon_floodplain_2000.gif Illustration of data set GIF Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000 Image evaluation and feature interpretation occurred at a scale of 1:10,000 - 1:500. Digitization of features occurred at a scale of 1:1,000. Topology rules were used to clean and edit features digitized within the floodplain boundary data set for overlap and boundary accuracy. A separate topology was run to edit digitizing overlap with the floodplain boundary data set and the features digitized within it to ensure all features were enclosed within the final floodplain boundary. Data are complete. Digitization of features occurred at a scale of 1:1000. In general, all features that were clearly visible at that scale were digitized. Minimum size and density specifications for digitizing are listed in each attribute definition. Where vegetation overhang and shadows overlapped with other features within the floodplain boundary digitizing an accurate boundary of the covered feature was attempted. Interpreting the boundary of the covered feature (Water, Built Feature or Bar) was done by extrapolating edges from visible data. Varied discharge associated with different photo dates occasionally resulted in discontinuity of water features at photo overlap and boundaries. In the situation of discontinuity at overlap one photo was exchanged for a bordering photo at approximately the mid-point of overlap and features were digitized to the photo being utilized. When discontinuity occurred at image boundaries or the photo exchange point the water feature with the greatest area was digitized. Mean daily discharges associated with different photo dates are recorded in the Photo Sets and Related Stream Discharge.xls spreadsheet located inside the SpragueRiverAnalysis.mdb file. All terrestrial features within the defined Floodplain Boundary are mapped as one of the floodplain surface types. A goal of an RMSE less than 5 meters was established for the georectification process. Photo scanning and DPI were calculated to ensure that 2000, 1968, and 1940 photo sets all had the same 1 meter pixel resolution. N/A U.S. Fish and Wildlife Service 2000 remote-sensing image U.S. Fish and Wildlife Service (USFWS). 1998 Natural color photo images, 1:12000. Sprague River Riparian Vegetation Characterization. Spatial Solutions, Inc. Bend, OR. 2000. 12,000 digital Aerial Photography 1998 ground condition USFWSDAP Aerial Photography U.S. Department of Agriculture 1985 map Cahoon, Joe. 1985. Soil Survey of Klamath County, Oregon; southern part. United States Department of Agriculture, Soil Conservation Service in cooperation with Oregon Agricultural Experiment Station. paper map 1985 ground condition USDASS85 Used to compare floodplain delineation and vegetation interpretations. Natural Resources Conservation Service 1985 map and tabular data Natural Resources Conservation Service (NRCS). Oregon Soil Survey Data. Klamath, OR640 Klamath County, southern part. Tabular and Spatial GIS data. Maps compiled from 1975 U.S. Geological Survey orthophotography. Published in Soil Survey of Klamath County, Oregon; southern part. 1985. http://www.or.nrcs.usda.gov/pnw_soil/or_data.html digital map and tabular data 1985 ground condition NRCSSS85 Used to digitize the 1975 river centerline and used in floodplain delineation. Watershed Sciences, LLC 2005 raster digital data Watershed Science. 2005. Sprague River LiDAR Remote Sensing and Data Collection. Submitted to the Klamath Tribes. digital elevation model 2005 ground condition WS2005 Used to identify topographic details that assisted in feature classification during digitizing as well as floodplain delineation. Also used for analysis of relative elevation and proximity of features within the delineated floodplain. Department of the Interior and Department of Agriculture 1985 map U.S. Geological Survey. Oregon-Klamath Co Quadrangle 7.5-Minute series Topographic Map. 1:24,000. U.S. Department of the Interior and U.S. Department of Agriculture. Variable dates (1985-1998). 24,000 digital topographic map 1985 1998 ground condition USGSTOPO Used as a reference for digitizing roads, railroads and feature names. U.S. Geological Survey 2000 remote-sensing image 20,000 digital orthophoto 2000 ground condition quadrangle Used to digitize channel and floodplain features for 2000. Data Acquisition: Remotely sensed imagery (historic aerial photos and LiDAR) researched and obtained. 2005 Digitizing: Began digitizing channel and floodplain features and river centerlines for 2000. Completed in 2008. Digitizing Protocol: The Sprague River Project is focused on geomorphic and vegetation changes over time within the active geomorphic floodplain of the Sprague River watershed. We defined the active geomorphic floodplain as the area adjacent to the channel system that is low-lying and displays geomorphic features typical of channel erosion and depositional processes clearly on imagery, including aerial photos, 7.5 min USGS topo maps, and LIDAR images (Watershed Sciences, 2005). Geomorphic features used to define the extent of the active geomorphic floodplain included point bars, scroll bars, abandoned channels (including oxbows ponds and filled channels), and swell and swale topography. The active geomorphic floodplain was distinguished from adjacent alluvial surfaces that are smoother and show less evidence of erosion and deposition, although some of these adjacent surfaces may be flooded regularly by overbank flows. Digital data sets were first digitized from the 2000 DOQs. High resolution LiDAR imagery data (Watershed Sciences, 2005) was used to identify topographic details that assisted in feature classification. If the feature visible in the LiDAR was not visible in the 2000 DOQ the feature was not digitized. Additional comparison with the 1998 color air photo mosaic (USFWS 1998) aided in evaluating the 2000 DOQs. The 2000 digital data was then used as a template for digitizing features from the 1968 and 1940s photo sets. Because the spatial context of this project is focused within the active geomorphic floodplain, interpreting and digitizing the floodplain boundary was prioritized to define area of digitization in all three year sets. Original data sets were digitized in ArcMap as separate shapefiles (line or polygon). Line files were "buffered" in ArcMAP to generate polygons with a calculable area for these features. All digitizing was reviewed and edited by the graduate research assistants or project leaders for interpretation consistency and data accuracy. After editing, the shapefiles were input into a geodatabase. The geodatabase was used to organize the data sets by data type and subtype, feature prioritization, and topology rules. WS2005 USGSTOPO USGSDOQ2000 USFWSDAP USDASS85 NRCSSS85 2005 Quality Assurance: Ran two stages of topology as discussed in the Logical Consistency Report 2008 Vector G-polygon 888 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 Sprague_River_Oregon_Floodplain_2000 Floodplain features in 2000 U.S. Geological Survey OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. TYPE Type of floodplain surface U.S. Geological Survey IS - Island Surface A terrestrial feature surrounded by a water feature (typically by primary and secondary channels) and with established vegetation. Islands can also contain built features and island attached bar features, which are included in the area of island polygons. Water features that are not part of the primary or secondary channel system (such as Ponds or Irrigation Ditches) may occur on Islands and were subtracted from the island feature area. Tone of islands varied, depending on the composition of vegetation and built features. U.S. Geological Survey MCBAR - Mid-Channel Bar Surface A sub-type of island features, mid-channel bars are depositional land features within a channel, typically smaller than an island and with little or no permanent vegetation. Mid-channel bar features were typically streamlined in shape and were most commonly light gray or white in tone, with a smooth texture or very subtle speckling. A minimum area of 16 pixels was required for the feature to be digitized as a mid-channel bar. They are classified as Bare (Vegetation) or very lightly vegetated. This data set of floodplain feature class is identical to the mid-channel bar data set in the bar feature class. U.S. Geological Survey FP - Floodplain Surface Any land surface that is not an island or mid-channel bar feature. Floodplains could have any combination of Vegetation classification. They contain built features and floodplain attached bar features, which are included in the area of floodplain polygons. Non-channel water features are found on floodplains and were subtracted from the floodplain feature area. Tone and texture were highly variable, reflecting different vegetation covers. Floodplain features were derived by subtracting all island, mid-channel bar, and all water features from the floodplain boundary data set. For example, irrigation water features were subtracted from the floodplain feature area. U.S. Geological Survey CF - Complete Floodplain Surface All terrestrial surfaces within the floodplain boundary data set. The complete floodplain was derived by subtracting a subset of water features (Primary Channel, Secondary Channel, Spring, Spring Channel, Tributary, and Backwater) from the floodplain boundary. Water features included in the calculable area of complete floodplain are irrigation water, pond and built pond. U.S. Geological Survey FB - Floodplain-Bars Surface Any depositional land features located between the channel and Floodplain with little or no permanent vegetation. Floodplain-bar features were typically streamlined in shape and were most commonly light gray or white in tone, with a smooth texture or very subtle speckling. A minimum area of 16 pixels was required for the feature to be digitized. They are classified as Bare (Vegetation) or very lightly vegetated. U.S. Geological Survey IB - Island-Bars Surface Any depositional land features located between the channel and an Island with little or no permanent vegetation. Island-bar features were typically streamlined in shape and were most commonly light gray or white in tone, with a smooth texture or very subtle speckling. A minimum area of 16 pixels was required for the feature to be digitized. They are classified as Bare (Vegetation) or very lightly vegetated. U.S. Geological Survey OFP - Other Floodplain Surface Any other land surface feature not defined as Island or Floodplain. Old Bridge Piling also identified as a Built Feature are also attributed as Other Floodplain Surface features in years 1968 and 2000. No Old Bridge Pilings are present in the 1940s photo set. U.S. Geological Survey SUBTYPE Subtype code U.S. Geological Survey 10 Floodplain Surface U.S. Geological Survey 11 Island Surface U.S. Geological Survey 12 Mid-Channel Bar Surface U.S. Geological Survey 13 Other Floodplain Surface U.S. Geological Survey 14 Complete Floodplain Surface U.S. Geological Survey 15 Floodplain-Bars Surface U.S. Geological Survey 16 Island-Bars Surface U.S. Geological Survey NAME Name of floodplain feature U.S. Geological Survey Unique name of floodplain feature. NOTE_ Notes U.S. Geological Survey Notes 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 Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html 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 http://water.usgs.gov/GIS/dsdl/SpragueRiverAnalysis.zip None. This dataset is provided by USGS as a public service. 20090929 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+spragueriveroregon_floodplain_2000 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998