Stream nutrient sampling during winter baseflow conditions in the Andrews Forest and Willamette River Basin, February 2009

  • Creator(s): Julia A. Jones, Jason J.B. Frentress
  • PI(s): Julia A. Jones
  • Originator(s): Jason J.B. Frentress
  • Other researcher(s): Kate Lajtha
  • Dates of data preparation: Feb 13 2009 - Jun 19 2009
  • Data collection status: Study collection is completed and no new collection is planned
  • Data access: Online
  • DOI:
  • Last update: Jan 27 2014 (Version 6)
<Citation>     <Acknowledgement>     <Disclaimer>    
Jones, J.; Frentress, J. 2014. Stream nutrient sampling during winter baseflow conditions in the Andrews Forest and Willamette River Basin, February 2009. H. J. Andrews Experimental Forest. Forest Science Data Bank, Corvallis, OR. [Database]. Available: Accessed 2023-12-11.
Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 08-23380), US Forest Service Pacific Northwest Research Station, and Oregon State University.
While substantial efforts are made to ensure the accuracy of data and documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is". The Andrews Forest shall not be liable for damages resulting from any use or misinterpretation of data sets.
To better understand the impact of land use on stream nutrient export, a synoptic sampling of streams draining 57 sub-basins within the Willamette River basin was conducted during winter baseflow conditions. The objective of the study was to assess how streamwater values of stream dissolved organic carbon (DOC), NO3- and Cl- and specific ultra-violet absorbance (SUVA) were related with the proportion of land in the watershed in urban areas, agriculture, and forest. Stream water samples were collected during baseflow conditions in February 2009 throughout the Willamette River basin, including the experimental watersheds (1,2,6,7,8,9,10), Lookout and Mack Creeks at the HJ Andrews Forest. Land use for each point-delineated watershed were determined from published values from the PNWERC dataset (

Study Description Study Site Map Download Study Location Information: (CSV)
Ecological Metadata Language: (EML)
1Site attributes (Feb 13 2009 - Feb 19 2009)METADATADATA
Stream sample locations, watershed area, elevation, stream order and land use within watersheds
2Site chemistry (Feb 13 2009 - Feb 19 2009)METADATADATA
Stream sample DOC, TN, NH3, NO3, Cl and SUVA[254nm]

 Frentress, Jay 2010, Stream DOC, nitrate, chloride and SUVA response to land use during winter baseflow conditions in sub-basins of the Willamette River basin, OR (Pub. No: 4624)