Episodic salinization and freshwater salinization syndrome mobilize base cations, carbon, and nutrients to streams across urban regions
| Autor: | Shuiwang Duan, Shahan Haq, Sujay S. Kaushal |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Biogeochemical cycle
Soil salinity 010504 meteorology & atmospheric sciences Dissolved silica 010501 environmental sciences 01 natural sciences 6. Clean water Salinity chemistry.chemical_compound Nutrient Nitrate chemistry 13. Climate action Environmental chemistry Dissolved organic carbon Environmental Chemistry Environmental science Eutrophication 0105 earth and related environmental sciences Earth-Surface Processes Water Science and Technology |
| Zdroj: | Biogeochemistry. 141:463-486 |
| ISSN: | 1573-515X 0168-2563 |
| Popis: | Urbanized watersheds in colder climates experience episodic salinization due to anthropogenic salt inputs and runoff from impervious surfaces. Episodic salinization can be manifested as a ‘pulse’ in concentrations and fluxes of salt ions lasting from hours to days after snowstorms in response to road salting. Episodic salinization contributes to freshwater salinization syndrome, characterized by cascading mobilization of chemicals and shifting acid–base status. We conducted laboratory experiments and analyzed high-frequency sensor data to investigate the water quality impacts of freshwater salinization syndrome and episodic salinization across 12 watersheds draining two major metropolitan regions along the U.S. East Coast. Sediments from 12 watersheds spanning land use gradients across two metropolitan regions, Baltimore, Maryland and Washington DC, were incubated across a range of replicated salinity treatments (0–10 g/L sodium chloride). There were statistically significant linear increasing trends in calcium and potassium concentrations with experimental salinization across all 12 sites and in magnesium concentrations at 11 of 12 sites (p |
| Databáze: | OpenAIRE |
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