Stream temperature and discharge measured each summer for Roche Moutonnee Creek and Trevor Creek. Dataloggers measured stream temperature and stream height at regular intervals. 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
In general, discharge measurements were taken at a variety of stage heights throughout the summer via conservative tracer additions. A rating curve was developed to relate stage height to discharge, then this relationship was applied to stage height measurements taken throughout each summer to provide more frequent discharge measurements. Onset HOBO pressure transducers were used to provide continuous stage and temperature data throughout the season. Starting in 2017, additional pressure transducers were deployed over winter to attempt to capture fall and spring discharge. Stage from the winter staff gauge was related to what stage would have been on the summer staff gauge, so the summer rating curve could be applied to calculate discharge.
All data with the comment "WINTER" should be used with caution. It is highly likely that the pool around the staff gauge is frozen for much of the remainder of the fall, and we have no visual confirmation of when the river fully freezes in the fall. Data are reported as early as 5/1 and as late as 10/31 when available; however, these should NOT be treated as the official start and end of flow.
In Roche Moutonnee Creek, the staff gauge was located in a pool almost directly across from the USGS stilling well upstream of the Dalton Highway crossing.
In Trevor Creek, the staff gauge was located in a pool about 130 meters upstream of the Dalton Highway crossing. In 2019, it was moved to a more protected area about 90m downstream from the original location.
2015: The pressure transducers in both Roche and Trevor went dry as flows dropped in September. Stage from the original staff gauges was related to stage from replacement staff gauges in deeper pools, and all stage values were standardized to match the late season staff gauge, providing a more continuous record of stage.
2017: In late fall, samples were taken on 9/25, 10/5 and 10/10. Notes indicate 30%, 75% and 95% ice cover, respectively. Ice observed around the staff gauge in October.
2018: It is likely that the pool in Trevor Creek where the staff gauge was located froze for a brief period in early June. Calculated discharge drops to zero, but flow was observed on multiple days during the period in which this occurred.
Protocols: See https://arc.lternet.edu/streams/arctic-lter-streams-protocol
Protocols: See http://arc.lternet.edu/streams/arctic-lter-streams-protocol
April 2019: F. Iannucci organized metadata and data from all individual years of discharge data.
November 2019: A. Medvedeff added 2019 discharge data and updated metadata.