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Discharge and suspended sediment a paired watershed study examining the effects of contemporary forest harvesting in the Oregon Coast Range

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Abstract
  • Forest harvesting practices can expose mineral soils, decrease infiltration capacities of soils, disturb the stream bank and channel, and increase erosion and fine sediment supply to stream channels. To reduce nonpoint source sediment pollution associated with forest management activities and to maintain the high water quality typically provided from forests, best management practices (BMPs) were developed and implemented. The Alsea Watershed Study was an important early research site that lead to the development of contemporary forest management practices to protect water quality and fish habitat in Oregon and elsewhere. By returning to the same watersheds that were harvested in 1966, this is one of the few times that a watershed-scale study is able to directly compare and contrast the effects of historical practices with contemporary practices. The Alsea Watershed Study Revisited includes the same three watersheds as the original study. Flynn Creek (FCG, 219 ha) is an old-growth dominated reference watershed. Deer Creek (DCG, 315 ha) is an extensively managed watershed that was patch-cut during the original study. Needle Branch (NBLG, 94 ha) was clearcut harvested in the original study and again in the recent study, but with contemporary BMPs, including riparian buffers. The upper portion of Needle Branch was harvested in 2009 (Phase I), while the lower portion of the watershed was harvested in 2015 (Phase II). This data set suspended sediments and discharge from WY 2006–2016.
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  • Hatten, J., Segura, C., Bladon, K., Hale, C., Ice, G. G., & Stednick, J. (2020). Discharge and suspended sediment a paired watershed study examining the effects of contemporary forest harvesting in the Oregon Coast Range (Version 1) [Data set]. Oregon State University. https://doi.org/10.7267/2Z10WX52X
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  • 17100205
  • 17100205030202
  • 17100205030201
  • 1417100205030201
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file details AlseaWatershedStudy_Sediment_Data.csv 2020-12-17 Public Download
file details AlseaWatershedStudy_Sediment_DIB.pdf 2021-07-03 Public Download
file details AlseaWatershedStudy_Sediment.xml 2021-07-03 Public Download