2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 8:30 AM - 10:30 AM | Classification of freshwater salinity regimes in urban streams across the United States | Virtual Platform
Classification of freshwater salinity regimes in urban streams across the United States
Urbanization increases non-point source loading of major ions from human activities into freshwater ecosystems. While elevated salinity is a commonly documented phenomenon in urban streams draining watersheds with heavy winter road salt use and increased hydrologic connectivity through roads and subsurface piping, the spatial variability and inter-annual consistency of winter salinity extremes in streams draining cities across the U.S. is unclear. We classified annual regimes of specific conductance as a proxy of salinity in 39 U.S. Geological Survey stream monitoring locations draining urbanized watersheds across the U.S. using dynamic time warping and hierarchical clustering. Urban stream salinity regimes varied within regions and among years, pointing to high spatiotemporal variability as a key characteristic of urban stream chemistry. We used a random forest classifier to explore how catchment attributes including local climate and urban development characteristics predict cluster membership across space and time. Identifying critical locations and times of peak solute export from urbanized watersheds can inform efforts to mitigate the salinization of freshwater ecosystems.
- Conductivity
- Data science
- Landscape
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Presenters/Authors
Joanna Blaszczak
(), Global Water Center and Department of Natural Resources and Environmental Science, University of Nevada, Reno, jblaszczak@unr.edu;
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Lauren Bolotin
(), University of Nevada Reno, bolotinljb@gmail.com;
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