Each week throughout the summer, the concentrations of phosphorus,
nitrate, and ammonium are measured at several stations in control and
nutrient-enriched sections of each stream. In some years, these
nutrients have also been measured in the hyporheic zones of the Kuparuk
River and the New Reach streams. These measurements are done by an
autoanalyzer and often by manual chemistry. Note that the analytical
chemistry methods changed over the years. Data is compiled into a single
file for multiple years if the methods remained the same.
The principal investigators in charge of the nutrient measurements are
Drs. Bruce Peterson, Mike Miller and Breck Bowden.
The menu below provides a complete list of sestonic and hyporheic
nutrient files. Consult the brief descriptor following each file name
for the information contained in each file. Clicking on a file name
will send you to a document file that describes the method in which the
data were collected; from the document file, you can access the data
file by clicking on the hypertext data file name.
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1990-currentpeknut - Samples from designated stations from the Kuparuk River were collected during each summer from 2000 to current time. Station sites are relative distance from the original 1983 phosphorus dripper. Stations include sites in a reference reach, a reach that has been recovering from phosphorus addition since 1996, and a reach that has had phosphorus added since 1983. Phosphoric acid is added to the stream to increase the soluble reactive phosphorus by 0.32 uM. Three sampling dates occurred each summer; once in June prior to the start of fertilization and once each in July and August. Water samples were analyzed for soluble reactive phosphate, ammonium, and nitrate.
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2000-currentpeonut - Samples from designated stations from Oksrukuyik Creek were collected during each summer from 2003 to current time. Sampling stations are in the reference reach of the stream, upstream of the point of phosphorus addition that occurred from 1991-1996. Nutrients analyzed by manual chemistry from Oksrukuyik Creek during the summer of 2003 to current time. Three sampling dates occurred each summer; once each in June, July, and August. Water samples were analyzed for soluble reactive phosphate, ammonium, and nitrate.
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90bohypo - Hyporheic nutrients for samples were collected from pools and riffles in both the control and fertilized reaches of the Kuparuk River.
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90penut - Nutrients run on the Technicon Autoanalyzer II for the lakes, rivers, experiments, and watersheds on of the Toolik Lake Research Area on the North Slope of Alaska during the summer of 1990.
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91bohypo - Hyporheic nutrients and chemistry for samples were collected from control pool and riffle sites in both the Kuparuk River and Oksrukuyik Creek.
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91penuts - Nutrients run on the AA on the lakes, rivers, experiments, and watersheds on of the Toolik Lake Research Area on the North Slope of Alaska during the summer of 1991.
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92bohypo - Hyporheic nutrients and chemistry for samples were collected from a grid of wells in one control pool/riffle site in both the Kuparuk River and Oksrukuyik Creek.
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92peknut - Nutrients run on the AA on the Kuparuk river during the summer of 1992.
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92peonut - Nutrients run on the AA on the Oksrukuyik river during the summer of 1992.
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93peknut - Nutrients run on the AA for the Kuparuk River during the summer of 1993.
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93peonut - Nutrients run on the AA from Oksrukuyik Creek during the summer of 1993.
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94boct01 - Rhodamine WT (RWT) concentrations over time at three sites on the Blueberry Creek June 25, 1994.
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94boct02 - Rhodamine WT (RWT) and bromide concentrations over time at two sites on the Blueberry Creek (New Reach 1994) July 2, 1994.
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94boct03 - Rhodamine WT (RWT) concentrations over time at two sites on the Blueberry Creek.
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94boct04 - Rhodamine WT (RWT) concentrations over time at one site on the tributary to Blueberry Creek July 21, 1994.
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94boct05 - Bromide concentrations over time at two sites on the Blueberry Creek August 6, 1994.
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94boct06 - Bromide (Br) concentrations over time at two sites on the Kuparuk river July 5, 1994.
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94bohypo - Hyporheic nutrient data for samples were collected from hyporheic samplers in Blueberry creek July 1 to August 11, 1994.
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94peknut - Nutrients run on the AA and by manual chemistry for the Kuparuk River during the summer of 1994.
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94peonut - Nutrients run on the AA and by manual chemistry from Oksrukuyik Creek during the summer of 1994.
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95boct01 - Bromide concentrations over time at three sites on the Oksrukuyik Creek, July 11, 1995.
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95boct02 - Bromide (Br) concentrations over time at two sites on Imnavait Creek July 3, 1995.
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95boct03 - Bromide (Br) concentrations over time at two sites on Imnavait Creek July 6, 1995.
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95boct04 - Bromide (Br) concentrations over time at two sites on Kuparuk River, July 15, 1995.
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95boct05 - Bromide (Br) concentrations over time at two sites on Inlet Stream to Toolik Lake, July 21, 1995.
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95boct06 - Bromide (Br) concentrations over time at two sites on Kuparuk River, Fertilized Zone July 25, 1995.
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95boht01 - Bromide concentrations within the hyporheic zone of Oksrukuyik creek, 11-Jul-1995, as a result of a continuos addition of the conservative tracer, sodium bromide, to the channel at an upstream site.
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95boht02 - Bromide concentrations within the hyporheic zone of Kuparuk River, July 15, 1995, as a result of a continuos addition of the conservative tracer, sodium bromide, to the channel at an upstream site.
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95boht03 - Bromide concentrations within the hyporheic zone of Kuparuk River, Fertilized Zone July 25, 1995, as a result of a continuos addition of the conservative tracer, sodium bromide, to the channel at an upstream site.
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95bohypo - Hyporheic nutrient data for samples were collected from pools and riffle in the Kuparuk river reference zone 1995 at or below the 0.0km marker. Samples were collected from the 2.7km riffle in the Kuparuk river fertilized zone 1995. Samples were collected from point bars(fertilized zone) and a riffle(reference zone) in Oksrukuyik creek 1995. Samples were collected from riffles in Imnavait creek 1995.
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95bovhg1 - Vertical hydraulic gradient (VHG) measurements for Oksrukuyik creek and both the reference and fertilized zones of the Kuparuk river during the 1995 field season.
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95peknut - Nutrients run on the AA for the Kuparuk River during the summer of 1995.
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95peonut - Nutrients run on the AA from Oksrukuyik Creek during the summer of 1995.
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96boct01 - Bromide (Br) concentrations over time at two sites on Kuparuk River, June 21, 1996.
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96boct02 - Bromide (Br) concentrations over time at two sites on Oksrukuyik Creek, June 26, 1996.
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96boct03 - Bromide (Br) concentrations over time at two sites on the Inlet stream to Toolik Lake July 5, 1996.
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96boct04 - This file provides documentation for file 96boct04.dat, a comma delimited file that contains Rhodamine WT (RWT) concentrations over time at two sites on the Lower Kuparuk River July 12-17, 1996.
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96boct05 - Bromide (Br) concentrations over time at two sites on the Kuparuk River July 26, 1996.
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96boht01 - Bromide concentrations within the hyporheic zone of Kuparuk River, June 21, 1996, as a result of a continuos addition of the conservative tracer, sodium bromide, to the channel at an upstream site. Additionally, the concentration of one or more of the following, associated with a given hyporheic well but not necessarily on the exact same date, exists within the file; phosphate, nitrate, ammonium, dissolved oxygen, specific conductivity, methane, and carbon dioxide.
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96boht02 - Bromide concentrations within the hyporheic zone of Oksrukuyik Creek, June 26, 1996, as a result of a continuos addition of the conservative tracer, sodium bromide, to the channel at an upstream site. Additionally, the concentration of one or more of the following, associated with a given hyporheic well but not necessarily on the exact same date, exists within the file; phosphate, nitrate, dissolved oxygen, specific conductivity, methane, and carbon dioxide.
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96boht03 - Bromide concentrations within the hyporheic zone of Kuparuk River July 26, 1996, as a result of a continuos addition of the conservative tracer, sodium bromide, to the channel at an upstream site. Additionally, the concentration of one or more of the following, associated with a given hyporheic well but not necessarily on the exact same date, exists within the file; phosphate, nitrate, ammonium, dissolved oxygen, specific conductivity, methane, and carbon dioxide.
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96boht04 - TRhodamine WT (RWT) concentrations with in the hyporheic and parafluvial zones of lower Kuparuk River as a result of a continuos addition of the conservative tracer, RWT, to the channel at an upstream site. Additionally, the concentration of one or more of the following, associated with a given hyporheic at some time during the addition, exists within the file; phosphate, nitrate, ammonium, dissolved oxygen, specific conductivity, methane, and carbon dioxide.
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96bohypo - Hyporheic nutrient data. Samples were collected from riffles in Oksrukuyik creek, late in the 1996 season.
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96boslg1 - Conductivity data for conservative tracer (NaBr) slug additions to the reference riffle in the Kuparuk river, June 28, 1996 and July 30, 1996, the fertilized zone riffle in the Kuparuk river June 29, 1996, and a riffle in fertilized zone of Oksrukuyik creek July 1, 1996.
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96bovhg1 - Vertical hydraulic gradient (VHG) measurements for Oksrukuyik creek, both the reference and fertilized zones of the Kuparuk river, and the mouth of the Kuparuk river during the 1996 field season.
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96peknut - Nutrients run on the AA for the Kuparuk River during the summer of 1996.
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96peonut - Nutrients run on the AA from Oksrukuyik Creek during the summer of 1996.
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97peknut - Nutrients run on the AA and by manual chemistry from the Kuparuk River during the summer of 1997.
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97peonut - Nutrients run on the AA and by manual chemistry from Oksrukuyik Creek during the summer of 1997.
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98peknut - Nutrients analyzed by manual chemistry from the Kuparuk River during the summer of 1998.
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98peonut - Nutrients analyzed by manual chemistry from Oksrukuyik Creek during the summer of 1998.
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99peknut - Nutrients from the Kuparuk River during the summer of 1999.
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99peonut - Nutrients analyzed by manual chemistry from Oksrukuyik Creek during the summer of 1998.
