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. Measurements were taken at the water line and recorded using a measuring stick placed vertically on the upstream side between the two culverts. The readings were in centimeters up from the bottom of the river. Measurements were taken daily. \
Discharge was calculated from stage height. The calibration of the discharge regression equation was rechecked during the summer at three different stage heights, 88, 89.5 and 112cm. Actual flow measurements were taken at the 10cm depth increments every 1 meter along a cross sectional transect of the river, just downstream of the gas pipeline crossing. Calibration measurements were taken using a Marsh-McBirney, Model 201 portable water current meter.
Due to the excessive 1989 spring break-up, the original stilling well and stage height measuring stick were washed away and lost. While a replacement measuring stick was positioned in the same location as the original, the zero point for the original stick was not recorded and it is unknown how the sticks correspond to one another with respect to their zero points. It is estimated that they were within 6cm of each other. The break-up also caused the section of the north culvert that was previously bent to bend further.
The three calibration values correspond fairly well to 1988’s regression curve when there is no change in slope of the curve at stage <105cm. Since there was minimal calibration data collected in 1989 due to the break-up, the discharge at all stage heights were calculated using the 1988 curve at a single slope (0.016). The rating curve equation used was y = ((x-70)^1.44 * 0.016) + 0.1), with x being the stage height. Raw data from the calibration measurement are available.
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.
Arctic LTER Streams Protocol, updated 2010 by EBS
annual data updated to new file
For Archival Use:
DATE RECEIVED: 4 December 1989
DATA FILE ENTERED BY: Carolyn Bauman
DATA FILE VALIDATION:
NAME: Carolyn Bauman
DATE: 7 Feb 1990, 4Oct91
Version 2: uploaded by J.Laundre
Version 3: 7/24/13: EJE organized metadata and data into this file. - Added temperature data to the Discharge file
Version 4: Keywords updated (23Jan14-Jd)
Version 5: Changed Distrubution URL since the LTER network DAS system is being discontinued. JimL 9Apr2015
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