Stream temperature and discharge each summer, water temperature and stream discharge are determined for the Kuparuk River. In many years, temperature and stream height were recorded manually each day. In recent years, data loggers have measured stream temperature and stream height at regular intervals. The Kuparuk River data is maintained by Dough Kane on the Water and Environmental Research Center at UAF (http://www.uaf.edu/water/projects/NorthSlope/upper_kuparuk/uk_river/uk_r...) Stream height is converted into stream discharge based on a rating curve calculated from manual discharge measurements throughout the season. The principal investigator in charge of the temperature and discharge measurements is Dr. Breck Bowden.
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Longterm monitoring and experimentation
Stage height measurements were taken 1 km upstream of the Kuparuk River crossing at the Dalton Highway. A Stevens Water Level Recorder with a float in a sitting well was used along with a pressure transducer to take a continuous record of stage height. Measurements were also taken at the water line from a measuring stick placed vertically on the upstream side between the two culverts. Readings on the measuring stick were in centimeters up from the bottom of the river.
Discharge measurements were made using both a Marsh-McBirney 201 flow meter and a Gurney flow meter. Calibration measurements were at 60% of depth at 20-30 points along a cross sectional transect of the river, downstream of the culverts at the pipeline crossing. Raw data from calibration measurements are available.
Due to early June high waters, the standpipe from 1991 was washed out and one of the culverts was badly damaged. The resulting erosion and road washout from the flood altered the stream morphology. A new standpipe was installed in late June, but was also washed out on July 1st. On July 4th another standpipe was installed. The data logger would normally supply missing data; however, the pressure transducer and the data logger were both lost in floods. The pressure transducer was washed downstream and lost in the early June flood. The data logger disappeared in the August 26 flood, prior to data collection. As a result, some data was lost.
Once again, a new discharge rating curve was developed for this year. The rating curve equation used was y = (-3.82 + 0.041*x )^2, with x as the stage height. Discharge was calculated for six stage height readings a day, taken at four hour intervals. Stage height was not accurately represented on the following days due to missing stage height data:
June 27 Only 1 reading - 1600 ASTJune 28 No readingsJune 29 No reading at 0000 and 0400July 1 No reading at 2000July 2 Only 1 reading - 1000July 3 Only 2 readings - 0930 and 1200July 4 No reading at 0000 and 0400Aug 14 No reading at 1600 and 2000Aug 15 Only 2 readings - 1600 and 2000
Breck Bowden performed some surveying at the Kuparuk road crossing to establish permanent reference marks and increase year to year continuity.
Temperature readings were taken daily with a 12” blunt stem reotemp dial-head thermometer at a location between the two culverts upstream of the road. There are several days within missing temperature data. There are also days where multiple temperature readings were taken.
Arctic LTER Streams Protocol, updated 2010 by EBS
annual data updated to new file
For Archival Use:
DATE RECEIVED: November 3, 1992
DATA FILE ENTERED BY: Nancy Parmentier
DATA FILE VALIDATION:
NAME: Nancy Parmentier
DATE: November 3, 1992
Version 3: 8/8/13: EJE organized metadata and data into this file. TEMPERATURE data ADDED to discharge
Version 4: Keywords updated 23Jan14
Version 5: Changed Distrubution URL since the LTER network DAS system is being discontinued. JimL 9Apr2015
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