2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/22/2019 | 9:15 AM - 9:30 AM | MACROPHYTES AND NUTRIENTS IN A STREAM SYSTEM: UTILIZING AND EVALUATING THE QUAL2K MODEL IN THE HENRY’S FORK OF THE SNAKE RIVER | 151 ABC
MACROPHYTES AND NUTRIENTS IN A STREAM SYSTEM: UTILIZING AND EVALUATING THE QUAL2K MODEL IN THE HENRY’S FORK OF THE SNAKE RIVER
Water quality modeling tools such as Qual2K (Q2K) will be key to understanding future nutrient fluxes as western U.S. rivers experience urban development and changes to migratory fish populations. The Q2K model does not account for macrophytes, which may influence nutrient flux and are common in some western rivers such as the Henry’s Fork of the Snake river in east Idaho. Our objectives were to 1) evaluate the effectiveness of Q2K in the Henry’s Fork, and 2) simulate how phosphorus loading is likely to change in the Henry’s Fork given future scenarios of wastewater treatment and kokanee salmon (Oncorhynchus nerka) migration. Q2K accurately modeled total phosphorus (TP) flux in the Henry’s Fork, but we struggled to accurately model soluble reactive phosphorus (SRP). SRP was sensitive to phosphorylation rates in sediments, flow rate, and periphyton coverage; processes influenced by macrophyte growth. Future use of Q2K to model P load from wastewater and kokanee in the Henry’s Fork will require an accurate understanding of feedbacks between SRP and macrophytes. Our study results enhance efforts to link nutrient flux and ecosystem change in the Henry’s Fork and in stream ecosystems in general.
- Phosphorous
- Macrophyte
- Water Quality
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Presenters/Authors
John McLaren
(), Utah State University, jacksmclaren@gmail.com;
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Phaedra Budy
(), U.S. Geological Survey, Utah Cooperative Fish and Wildlife Research Unit, Utah State University, phaedra.budy@usu.edu;
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Soren Brothers
(), Utah State University, soren.brothers@usu.edu;
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Rob Van Kirk
(), Henry's Fork Foundation, rob@henrysfork.org;
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