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  • Hubbard Brook Experimental Forest: Daily Streamflow by Watershed, 1956 - present
  • USDA Forest Service, Northern Research Station
  • 2019-05-14
  • USDA Forest Service, Northern Research Station. 2019. Hubbard Brook Experimental Forest: Daily Streamflow by Watershed, 1956 - present ver 10. Environmental Data Initiative. https://doi.org/DOI_PLACE_HOLDER (Accessed 2024-12-28).

  • Streamflow at 9 watersheds within the Hubbard Brook Experimental Forest has been measured continuously from as early as 1955. Streams are gaged with V-notch weirs at the outlet of each watershed. Height of water behind the weir increases with increased streamflow and is recorded by means of a float attached mechanically to a pen on a spring-wound strip-chart recorder. Gage height is converted to streamflow rate by calibration factors and then integrated to generate daily streamflow. Streamflow rate is measured as volume per unit time(L/s) and is proportional to the watershed area.

    Beginning January 1, 2013, instantaneous streamflow data (and derived daily streamflow) are measured by electronic sensors, and data are provisional as the transition from chart to digital data collection is still under evaluation. Data may be updated before they are finalized. Please contact the dataset creator prior to data use/publication. Daily streamflow data are derived from the instantaneous streamflow record, and additional information (quality control flagging and gapfilling) can be found in that record https://portal.lternet.edu/nis/mapbrowse?scope=knb-lter-hbr&identifier=1

    In 2016, a new, more comprehensive gapfilling method was used, wherein data removed by QC flagging are calculated with a regression ensemble, using data from all remaining weirs that have data passing QC tests. The median of the predicted 5-minute discharge rates based on regression with the remaining weirs was used as the robust prediction of discharge for a data gap. Additionally, the difference between the prediction and the actual values at the beginning and end of a gap were set to zero to “snap” the prediction to the adjacent measured values.

    These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.

  • Geographic Coordinates
    • N: 43.959286, S: 43.952053, E: -71.726311, W: -71.731339
    • N: 43.960224, S: 43.939945, E: -71.687683, W: -71.728706
    • N: 43.962128, S: 43.939945, E: -71.687683, W: -71.725502
    • N: 43.95837, S: 43.939945, E: -71.687683, W: -71.737183
    • N: 43.9571, S: 43.939945, E: -71.687683, W: -71.739853
    • N: 43.957001, S: 43.949928, E: -71.735649, W: -71.743462
    • N: 43.948246, S: 43.916016, E: -71.687683, W: -71.77346
    • N: 43.948246, S: 43.917942, E: -71.687683, W: -71.76255
    • N: 43.948246, S: 43.915962, E: -71.687683, W: -71.758507
  • This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.
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