Effects of Wildfires and Ash Leaching on Stream Chemistry in the Santa Ynez Mountains of Southern California
| Autor: | John M. Melack, Jean M. Carlson, Parker Shankin-Clarke, Matthew Meyerhof, Carl Swindle |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
location.dated_location
inorganic chemicals Watershed Geography Planning and Development Santa Ynez STREAMS Aquatic Science Biochemistry complex mixtures Rainwater harvesting location major cations Ecosystem TD201-500 Water Science and Technology Volatilisation Water supply for domestic and industrial purposes Chemistry potassium technology industry and agriculture ash Storm Hydraulic engineering stream chemistry Environmental chemistry Leaching (pedology) TC1-978 fire |
| Zdroj: | Water, Vol 13, Iss 2402, p 2402 (2021) Water Volume 13 Issue 17 |
| ISSN: | 2073-4441 |
| Popis: | Wildfires can change ecosystems by altering solutes in streams. We examined major cations in streams draining a chaparral-dominated watershed in the Santa Ynez Mountains (California, USA) following a wildfire that burned 75 km2 from July 8 to October 5, 2017. We identified changes in solute concentrations, and postulated a relation between these changes and ash leached by rainwater following the wildfire. Collectively, K+ leached from ash samples exceeded that of all other major cations combined. After the wildfire, the concentrations of all major cations increased in stream water sampled near the fire perimeter following the first storm of the season: K+ increased 12-fold, Na+ and Ca2+ increased 1.4-fold, and Mg2+ increased 1.6-fold. Our results suggested that the 12-fold increase in K+ in stream water resulted from K+ leached from ash in the fire scar. Both C and N were measured in the ash samples. The low N content of the ash indicated either high volatilization of N relative to C occurred, or burned material contained less N. |
| Databáze: | OpenAIRE |
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