Sagehen Creek Field Station

07 Sep, 11 AM - 12 Sep, 05 PM

Objective: Compare the resolution and fluxes of multiple methods of quantifying groundwater-surface water interactions. I suggest focusing on a 1-2 km reach upstream of the USGS stream gauge because 1) there is access to electricity for the fiber optic system; 2) the stream gauge will provide continuous streamflow data; and 3) this stream section is low gradient (~5 m/km??) with a gentle riffle and pool geometry and a streambed of sand or rounded cobbles (in the riffles). The mean September discharge is 0.05-0.1 m3/s (~1.5 -3 cfs) but the baseflow can be <1 cfs. We would collect distributed temperature data for ~7 days while also collecting radon data (in real time) and completing SF6 tracer experiments (to determine the gas exchange velocity in riffles and pools). We would inject SF6 into the stream and monitor the concentrations downstream at two to four locations. The radon and SF6 data will constrain groundwater discharge rates using the model developed by Cook et al. 2006.

Visit #18850 @Sagehen Creek Field Station

Approved

Under Project # 20360 | Research

Hyporheic exchange experiment

research_scientist - University of British Columbia

Reservation Members(s)

Group of 2 Research Scientist/Post Doc Sep 7 - 12, 2009 (6 days)

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Meadow Cabin (Lower Camp) 2 Sep 7 - 12, 2009