Loading…
This event has ended. Create your own event on Sched.

Thank you to everyone who attended the 11th Annual Salt Lake County Watershed Symposium! This free two-day conference encourages a comprehensive review of the current state of our watershed while creating learning opportunities for a diverse array of stakeholders. Sessions covered a broad range of topics on water quality and watershed issues with local, regional, and national relevance. Hosted by Salt Lake County Watershed Planning & Restoration.

We love feedback! Take the Symposium Survey


"The Symposium is tremendously important to the future of all of Utah. You guys are educating stakeholders across Northern Utah in an objective, user-friendly way about issues, problems and concerns that are not being discussed publicly anywhere else."  -Zach Frankel, Utah Rivers Council


View analytic
Wednesday, November 15 • 4:00pm - 4:30pm
Using 87Sr/86Sr Ratios to Investigate Changes in Stream Chemistry

Log in to save this to your schedule and see who's attending!

Feedback form is now closed.
Using 87Sr/86Sr Ratios to Investigate Changes in Stream Chemistry

Summary:
Water chemistry in mountain streams is variable during spring snowmelt as shallow groundwater flow paths are activated in the watershed, introducing solutes derived from soil water. Sr isotopes and other tracers can be used to differentiate waters that have interacted with soils and dust (shallow groundwater) and bedrock (deep groundwater).

Full Abstract:
Water chemistry in mountain streams is variable during spring snowmelt as shallow groundwater flow paths are activated in the watershed, introducing solutes derived from soil water. Sr isotopes and other tracers can be used to differentiate waters that have interacted with soils and dust (shallow groundwater) and bedrock (deep groundwater). To investigate processes controlling water chemistry during snowmelt, we analyzed 87Sr/86Sr ratios, Sr and other trace element concentrations in bulk snowpack, dust, soil, soil water, ephemeral channels, and river water during snowmelt runoff in the upper Provo River watershed in northern Utah, USA, over four years (2014-2017). Strontium concentrations in the river averaged ~20 ppb during baseflow and decreased to ~10 ppb during snowmelt runoff. 87Sr/86Sr ratios were around 0.717 during base flow and decreased to 0.715 in 2014 and 0.713 in 2015 and 2016 during snowmelt, trending towards less radiogenic values of mineral dust inputs in the Uinta Mountain soils. Ephemeral channels, representing shallow flow paths with soil water inputs, had Sr concentrations between 7-20 ppb and 87Sr/86Sr ratios between 0.713-0.716. Snowpack Sr concentrations were generally

Speakers
CH

Colin Hale

Graduate Student, BYU
Colin Hale has graduated from Brigham Young University with his bachelor’s degree in Geology. He is currently working towards his master’s degree at the same university under Dr. Greg Carling. He is studying the processes controlling fluctuations in river water chemistry duri... Read More →



Attendees (16)