Study of Fuel-Smoke Dynamics in a Prescribed Fire of Boreal Black Spruce Forest through Field-Deployable Micro Sensor Systems
| Autor: | Ginny Marshall, Dan K. Thompson, Masum Hossain, Quamrul Huda, Ken Hidalgo, David Lyder, Alberto J. Leon, Dave Schroeder, Marty Collins |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
smoke propagation model
010504 meteorology & atmospheric sciences Fine particulate QC1-999 smoke dynamics Environmental Science (miscellaneous) Combustion Atmospheric sciences 01 natural sciences Earth and Planetary Sciences (miscellaneous) Safety Risk Reliability and Quality Air quality index micro sensor system 0105 earth and related environmental sciences 040101 forestry Smoke Physics fine particulate matters Pollutant transport Forestry 04 agricultural and veterinary sciences Building and Construction smoldering combustion Black spruce air quality Sharp rise Boreal 0401 agriculture forestry and fisheries Environmental science Safety Research flaming combustion prescribed fire |
| Zdroj: | Fire, Vol 3, Iss 30, p 30 (2020) Fire Volume 3 Issue 3 |
| ISSN: | 2571-6255 |
| Popis: | Understanding the combustion dynamics of fuels, and the generation and propagation of smoke in a wildland fire, can inform short-range and long-range pollutant transport models, and help address and mitigate air quality concerns in communities. Smoldering smoke can cause health issues in nearby valley bottoms, and can create hazardous road conditions due to low-visibility. We studied near-field smoke dynamics in a prescribed fire of 3.4 hectares of land in a boreal black spruce forest in central Alberta. Smoke generated from the fire was monitored through a network of five field-deployable micro sensor systems. Sensors were placed within 500&ndash 1000 m of the fire area at various angles in downwind. Smoke generated from flaming and smoldering combustions showed distinct characteristics. The propagation rates of flaming and smoldering smoke, based on the fine particulate (PM2.5) component, were 0.8 and 0.2 m/s, respectively. The flaming smoke was characterized by sharp rise of PM2.5 in air with concentrations of up to 940 µ g/m3, followed by an exponential decay with a half-life of ~10 min. Smoldering combustion related smoke contributed to PM2.5 concentrations above 1000 µ g/m3 with slower decay half-life of ~18 min. PM2.5 emissions from the burn area during flaming and smoldering phases, integrated over the combustion duration of 2.5 h, were ~15 and ~16 kg, respectively, as estimated by our mass balance model. |
| Databáze: | OpenAIRE |
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