干旱区生态环境知识资源中心(Arid): Extreme Precipitation Across Adjacent Burned and Unburned Watersheds Reveals Impacts of Low Severity Wildfire on Debris-Flow Processes

Arid

DOI	10.1029/2020JF005997
	Extreme Precipitation Across Adjacent Burned and Unburned Watersheds Reveals Impacts of Low Severity Wildfire on Debris-Flow Processes
	McGuire, Luke A.; Youberg, Ann M.; Rengers, Francis K.; Abramson, Nathan S.; Ganesh, Indujaa; Gorr, Alexander N.; Hoch, Olivia; Johnson, Justin C.; Lamom, Patt; Prescott, Alexander B.; Zanetell, Jessica; Fenerty, Brendan
通讯作者	McGuire, LA (corresponding author), Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
ISSN	2169-9003
EISSN	2169-9011
出版年	2021
卷号	126 期号:4
英文摘要	In steep landscapes, wildfire-induced changes to soil and vegetation can lead to extreme and hazardous geomorphic responses, including debris flows. The wildfire-induced mechanisms that lead to heightened geomorphic responses, however, depend on many site-specific factors including regional climate, vegetation, soil texture, and soil burn severity. As climate and land use change drive changes in fire regime, there is an increasing need to understand how fire alters geomorphic responses, particularly in areas where fire has been historically infrequent. Here, we examine differences in the initiation, magnitude, and particle-size distribution of debris flows that initiated within the area burned by the 2019 Woodbury Fire in central Arizona, USA, and those that initiated in a nearby unburned area. Despite similar rainfall intensities, unburned watersheds were less likely to produce debris flows. Debris flows in unburned areas initiated from both runoff and shallow landslides, while debris flows only initiated from runoff-related processes in the burned area. The grain-size distribution making up the matrix of debris-flow deposits within the burned area generally had a lower ratio of sand to silt relative to debris flows that initiated in the unburned area, though there were no systematic differences in the coarse fraction of debris-flow sediment between burned and unburned areas. Results help expand our ability to predict postwildfire debris-flow activity in a wider range of settings, specifically the Sonoran Desert ecoregion, and provide general insight into the impact of wildfire on geomorphic processes in steep terrain.
英文关键词	debris flow fire grain size initiation landslide volume
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000645002100006
WOS关键词	SOIL-HYDRAULIC-PROPERTIES ; INTENSITY-DURATION THRESHOLDS ; RUNOFF ; INITIATION ; EROSION ; FIRE ; PREDICTION ; RAINFALL ; BASIN ; INFILTRATION
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	University of Arizona ; United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350844
作者单位	[McGuire, Luke A.; Abramson, Nathan S.; Gorr, Alexander N.; Hoch, Olivia; Lamom, Patt; Prescott, Alexander B.; Fenerty, Brendan] Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA; [Youberg, Ann M.] Univ Arizona, Arizona Geol Survey, Tucson, AZ USA; [Rengers, Francis K.] US Geol Survey, Golden, CO USA; [Ganesh, Indujaa] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA; [Johnson, Justin C.] Univ Arizona, Sch Nat Resourr & Environm, Tucson, AZ USA; [Zanetell, Jessica] Univ Arizona, Program Appl Math, Tucson, AZ 85721 USA
推荐引用方式 GB/T 7714	McGuire, Luke A.,Youberg, Ann M.,Rengers, Francis K.,et al. Extreme Precipitation Across Adjacent Burned and Unburned Watersheds Reveals Impacts of Low Severity Wildfire on Debris-Flow Processes[J]. University of Arizona, United States Geological Survey,2021,126(4).
APA	McGuire, Luke A..,Youberg, Ann M..,Rengers, Francis K..,Abramson, Nathan S..,Ganesh, Indujaa.,...&Fenerty, Brendan.(2021).Extreme Precipitation Across Adjacent Burned and Unburned Watersheds Reveals Impacts of Low Severity Wildfire on Debris-Flow Processes.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,126(4).
MLA	McGuire, Luke A.,et al."Extreme Precipitation Across Adjacent Burned and Unburned Watersheds Reveals Impacts of Low Severity Wildfire on Debris-Flow Processes".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 126.4(2021).