干旱区生态环境知识资源中心(Arid): Disturbance and valley confinement: Controls on floodplain large wood and organic matter jam deposition in the Colorado Front Range, USA

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DOI	10.1002/esp.5321
	Disturbance and valley confinement: Controls on floodplain large wood and organic matter jam deposition in the Colorado Front Range, USA
	Guiney, Molly R.; Lininger, Katherine B.
通讯作者	Guiney, MR (corresponding author)，Univ Colorado, Dept Geog, Boulder, CO 80309 USA.
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2022-01
英文摘要	Organic matter dynamics (entrainment, transport, deposition) can influence ecogeomorphic complexity in rivers. However, the depositional controls on downed large wood (LW) and coarse particulate organic matter (CPOM) on floodplains have rarely been assessed. We investigate the influence of different disturbance histories, as well as geomorphology and forest stand density, on the deposition of LW and CPOM accumulations, or jams, between two adjacent drainages (West Creek, North Fork Big Thompson) in the semi-arid Colorado Front Range, USA. Both basins recently experienced an extreme flood, but West Creek experienced a larger flood peak as well as a recent upstream fire. We also analyse jam fabric (LW piece orientation) between floodplain and in-channel jam types. We measured LW and CPOM jams on the North Fork to compute jam frequencies (jams ha(-1)) and loads (volume per area; m(3) ha(-1)), and we compare these data to a previously published dataset from West Creek. Average floodplain LW jam frequencies (70.4 jams ha(-1)) and loads (678.6 m(3) ha(-1)) on West Creek were significantly higher than on the North Fork (frequency: 14.8 jams ha(-1); load: 94.3 m(3) ha(-1)). Average floodplain CPOM jam frequencies (West Creek: 19.0 jams ha(-1); North Fork: 15.1 jams ha(-1)) and loads (West Creek: 10.70 m(3) ha(-1); North Fork: 9.98 m(3) ha(-1)) were not significantly different between basins. A larger flood peak, likely enhanced by a recent upstream fire and a more confined valley bottom, resulted in greater deposition of LW jams on West Creek compared to the North Fork. Geomorphic characteristics, such as valley confinement and slope, also influence jam frequencies and loads. Floodplain jam types oriented parallel to the stream were significantly different than other jam types. This work will inform river restoration efforts using wood and organic matter and provide insight on the transport and depositional processes influencing floodplain LW jam formation.
英文关键词	Colorado fire flood floodplain large wood organic matter
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000749731700001
WOS关键词	MOUNTAIN NATIONAL-PARK ; RIVER CORRIDORS ; BRUSH PILES ; AIN RIVER ; DEBRIS ; CHANNEL ; TRANSPORT ; DYNAMICS ; STREAM ; FIRE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377058
作者单位	[Guiney, Molly R.; Lininger, Katherine B.] Univ Colorado, Dept Geog, Boulder, CO 80309 USA
推荐引用方式 GB/T 7714	Guiney, Molly R.,Lininger, Katherine B.. Disturbance and valley confinement: Controls on floodplain large wood and organic matter jam deposition in the Colorado Front Range, USA[J],2022.
APA	Guiney, Molly R.,&Lininger, Katherine B..(2022).Disturbance and valley confinement: Controls on floodplain large wood and organic matter jam deposition in the Colorado Front Range, USA.EARTH SURFACE PROCESSES AND LANDFORMS.
MLA	Guiney, Molly R.,et al."Disturbance and valley confinement: Controls on floodplain large wood and organic matter jam deposition in the Colorado Front Range, USA".EARTH SURFACE PROCESSES AND LANDFORMS (2022).