Modeled bedload-transport capacity for the Siletz River, Oregon

Bedload-transport capacity models of the Siletz River, Oregon, were developed using standard sediment transport equations (Parker, 1990a,b; Wilcock and Crowe, 2003; Recking, 2013) for the reach from Moonshine Park to the town of Siletz, Oregon (river kilometers 87.2 to 68.5) to evaluate bedload transport capacity over a broad range of streamflows. Models were used to assess longitudinal changes in bedload transport capacity and identify locations where deposition of sands, gravels, and cobbles is most likely. Model inputs included results from a one-dimensional hydraulic model (White and others, 2025), measured surficial and subsurface particle-size data (Jones and Keith, 2021), and streamflows (U.S. Geological Survey, 2024). Details on the bedload-transport capacity models, including sediment transport equations, hydraulic and sediment inputs, and results can be found in the accompanying report (Jones and others, 2025). This documentation describes the zipped folder containing the bedload sediment transport capacity model files for the Siletz River including input, model, and output files. This documentation also describes associated readme text. Users are advised to read the dataset's metadata and readme files and associated report (Jones and others, 2025) thoroughly to understand appropriate use and data limitations. Jones, K.L, and Keith, M.K., 2021, Surficial and subsurface grain-size data for the Siletz River, Oregon, 2017-18: U.S. Geological Survey Data release, accessed May 17. 2022 at https://doi.org/10.5066/P96ZXPP. Jones, K.L., Keith, M.K., Harden, T.M., White, J.S., van de Wetering, S., and Dunham, J.B., 2025, Assessment of channel morphology, hydraulics, and bed-material transport along the Siletz River, western Oregon: U.S. Geological Survey Scientific Investigations Report 2025-5063, 95 p., https://doi.org/10.3133/sir20255063. Parker, Gary, 1990a, Surface-based Bedload transport relation for gravel rivers: Journal of Hydraulic Research, v. 28, no. 4, p. 417–436. Parker, Gary, 1990b, The ACRONYM series of PSACAL programs for computing bedload transport in gravel rivers: External Memorandum M-220. St. Anthony Falls Laboratory, University of Minnesota, 124 p. Recking, Alain, 2013, Simple Method for Calculating Reach-Averaged Bed-Load Transport: Journal of Hydraulic Engineering, v. 139, no. 1, p. 70–75. U.S. Geological Survey, 2024, National Water Information System—Web interface: U.S. Geological Survey, https://waterdata.usgs.gov/nwis. White, J.S., Harden, T.M., Jones, K.L., and Keith, M.K., 2025, One- and two-dimensional hydraulic models for the Siletz River, Oregon: U.S. Geological Survey data release, https://doi.org/10.5066/P1489NN8. Wilcock, P.R., and Crowe, J.C., 2003, Surface-based transport model for mixed-size sediment: Journal of Hydraulic Engineering, v. 129, p. 120–128.

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