Doyle, Micelis C. Smith, Cassandra D. Jones, Krista L. Costello, Alexandria E. 20250923 Tabular data set Reston, VA U.S. Geological Survey https://doi.org/10.5066/P9SPNYKJ Micelis C. Doyle Cassandra D.Smith Krista L. Jones Alexandria E. Costello 2024 publication https://doi.org/10.3133/sir20225022C The USGS computed streamflow during 2016 and 2017 at two sites – one on Bronson Creek (USGS station 453250122494501) and one on Fanno Creek (USGS station 452738122474100), which are tributaries to the Tualatin River in northwestern Oregon. The computed streamflows from the two aforementioned sites were then used to estimate the corresponding streamflow at two other sites- USGS station 453320122483701 (located upstream of the computed streamflow on Bronson Creek); and USGS station 452718122474700 (located downstream of the computed streamflow on Fanno Creek) The estimated streamflow was calculated by applying a scaling factor to the computed streamflow that reflected the difference in drainage areas between the sites in each stream. This data release documents the supporting information for an accompanying USGS Scientific Investigations Report “Beavers in the Tualatin River Basin, Oregon: 3. Effects on Sediment Transport and Deposition in Urban Streams (https://doi.org/10.3133/sir20225022C." The water level data collected during this study, and the data that were used to develop the site specific stage-streamflow relations (rating curves) are available from the USGS National Water Information System (NWIS). 20160622 20171129 ground condition Complete None planned -122.82900 -122.79500 45.55600 45.45500 ISO 19115 Topic Category farming inlandWaters USGS Thesaurus river systems aquatic ecosystems Producer defined North American beavers Castor canadensis USGS Metadata Identifier USGS:61e068ddd34e8911d9fe9db0 Geographic Names Information System Oregon Clackamas County Multnomah County Washington County Fanno Creek Bronson Creek Tualatin River None. Please see 'Distribution Info' for details. These data are in the public domain in accordance with Creative Commons Zero v1.0 UniversalPublic Domain Dedication (CC0-1.0) and have no use constraints. Users are advised to read thedataset's metadata thoroughly to understand appropriate use and data limitations. Krista Jones U.S. Geological Survey, NW-PACIFIC ISLAND REG Hydrologist mailing address

601 SW 2nd Ave

Portland OR 97204 US 503-758-4641 gs-w-or_sciencebase@usgs.gov The authors are thankful for the assistance of Greg Lind and Marc Stewart from USGS who helped develop the stage-streamflow rating curves used in this study. The mean absolute error in the computed or estimated streamflow at all four stations was calculated based on the difference between measured (instantaneous) streamflow readings and the values obtained either from using the rating curves (for stations 453250122494501 and 452738122474100) or from scaling by the drainage area ratios (for stations 453320122483701 and 452718122474700). The calculated errors were based on streamflow values greater than one cubic foot per second. The rating curve used at station 453250122494501 (downstream station on Bronson Creek) had an estimated error of 27 percent, the rating curve used at station 452738122474100 (upstream station on Fanno Creek) had an estimated error of 24 percent, the drainage area ratio method used at station 453320122483701 (upstream station on Bronson Creek) had an estimated error of 41 percent, and the drainage area ratio method used at station 453320122483701 (downstream station on Fanno Creek) had an estimated error of 12 percent. Attribute values were checked for logical ranges of values and outliers by the study investigators. Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. No formal positional accuracy tests were conducted No formal positional accuracy tests were conducted Doyle, Micelis C., Smith Cassandra D., Jones, Krista L., Costello, Alexandria E. 2021 Manuscript Reston, VA U.S. Geological Survey https://doi.org/10.5066/xxxxxxx Scientific Investigations Report 20160622 20171129 Ground condition Doyle_2023 Provides detailed description of techniques used to collect the streamflow data included in the data release. Emerson, Dougla.G., Vecchia, Aldo, and Dahl, A.L., 2005 Manuscript Reston, VA U.S. Geological Survey https://doi.org/10.3133/sir20055017 Scientific Investigations Report 20050101 20051231 Publication date Emerson_2005 Specified the techniques used to estimate streamflow using drainage area ratios. Turnipseed, D. Phil., and Sauer, Vernon B. 2010 Manuscript Reston, VA U.S. Geological Survey Specified the techniques used to compute streamflow from stream water-elevation measurements. Techniques and Methods book 20100101 20101231 Publication date Turnipseed_2010 Specified the techniques used to compute streamflow from stream water-elevation measurements. U.S. Geological Survey 2017 tabular digital data https://waterdata.usgs.gov/or/nwis/nwis Digital and/or Hardcopy 20160622 20171129 ground condition NWIS Data base where the water-level data and rating curve data from this study are stored. 1. While the techniques used to create this data release are summarized here, a full description of how streamflow was computed and estimated for this study is included in Doyle_2023. Doyle_2023 2017 2. Water levels were continuously measured at USGS station 453250122494501 on Bronson Creek at one-hour intervals between 6/30/2016 and 10/11/2016 and at half-hour intervals between 10/11/2016 and 11/29/2017. 2017 3. Water levels were continuously measured at USGS station 452738122474100 on Fanno Creek at one-hour intervals between 6/22/2016 and 10/11/2016 and at half-hour intervals between 10/11/2016 and 11/29/2017. 2017 4. The streamflow at station 453250122494501 on Bronson Creek and station 452738122474100 on Fanno Creek were computed from measured water-level values at those locations and site-specific stage-streamflow relations (known as rating curves), and following the methods specified in Turnipseed_2010. The rating curve for station 453250122494501 was based on eight concurrent elevation and streamflow measurements taken at that site between 12/10/16 and 11/01/17. The rating curve for station 452738122474100 was based on eleven concurrent elevation and streamflow measurements taken at that site between 07/13/16 and 11/01/17. No changes to the rating curves were made before using them to estimate the streamflow values in this data release. Turnipseed_2010 2017 5. Streamflow was estimated at upstream USGS station 453320122483701 on Bronson Creek during the period of record for station 453250122494501 by multiplying each computed value from station 453250122494501 by 0.545 (the ratio between the drainage areas for the stations) using the methods described in Emerson_2005. 2017 6. Streamflow was estimated at downstream USGS station 452718122474700 on Fanno Creek during the period of record for station 452738122474100 by multiplying each computed value from station 452738122474100 by 1.019 (the ratio between the drainage areas for the stations) using the methods described in Emerson_2005. Emerson_2005 2017 All streamflow values were reported consistent with USGS standards: a) values less than or equal to 0.10 cfs were rounded to one significant figure; b) values greater than 10 but less than 100 cfs were rounded to two significant figures; and c) values greater than 100 cfs were rounded to three significant figures. The streamflow values are reported to the hundredth decimal place, and values less than 0.01 cfs were reported as 0.01 cfs with a remark of "<". 2017 The station locations described in this metadata can be found on USGS topographic maps. Point 0.0001 0.0001 Decimal degrees D_North_American_1983 GRS_1980 6378137.0 298.257222101 site_info.txt Site information for stations used in study U.S. Geological Survey Station_ID Identification number for USGS station U.S. Geological Survey USGS National Water Information System https://waterdata.usgs.gov/nwis Station_Name Name of USGS station U.S. Geological Survey USGS National Water Information System https://waterdata.usgs.gov/nwis Station_Lat Latitude of USGS station U.S. Geological Survey 45.455 45.556 Decimal degrees Station_Lon Longitude of USGS station U.S. Geological Survey -122.829 -122.795 Decimal degrees Station_DA_sqmi Drainage area for USGS station U.S. Geological Survey and producer defined 2.0 10.5 Square miles bronson_streamflow.csv Computed and estimated streamflow in Bronson Creek Producer Defined Date Date that streamflow was computed or estimated Producer Defined 06/30/16 11/29/17 Time Time that streamflow was computed or estimated Producer Defined 0:00 23:30 453250122494501_CQ Computed streamflow at station 453250122494501 Producer Defined . Streamflow not computed Producer defined 0.01 205.00 Cubic feet per second 0.01 453250122494501_CQ_remark Remark for 453250122494501_CQ Producer Defined ND No data Producer defined - No remark Producer defined 453320122483701_EQ Estimated streamflow at station 453320122483701 Producer Defined 0.01 100.00 Cubic feet per second 0.01 453320122483701_EQ_remark Remark for 453320122483701_EQ Producer Defined ND No data Producer defined - No remark Producer defined < Less than the reported value Producer defined fanno_streamflow.csv Comma Separated Value (CSV) file containing data. Producer Defined Date Date that streamflow was computed or estimated Producer Defined 06/22/16 11/29/17 Time Time that streamflow was computed or estimated Producer Defined 0:00 23:30 452738122474100_CQ Computed streamflow at station 452738122474100 Producer Defined 0.15 323.0 Cubic feet per second 0.01 452738122474100_CQ_remark Remark for 452738122474100_CQ Producer Defined - No remark Producer defined 452718122474700_EQ Estimated streamflow at station 452718122474700 Producer Defined 0.15 329.0 Cubic feet per second 0.01 452718122474700_EQ_remark Remark for 452718122474700_EQ Producer Defined - No remark Producer defined GS ScienceBase U.S. Geological Survey mailing and physical

Denver federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. 20250923 Daniel Wise U.S. Geological Survey, NW-PACIFIC ISLAND REG Hydrologist mailing address

601 SW 2nd Ave

Portland OR 97204 US 971-413-0036 gs-w-or_sciencebase@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998