干旱区生态环境知识资源中心(Arid): Reach-scale bankfull channel types can exist independently of catchment hydrology

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DOI	10.1002/esp.4874
	Reach-scale bankfull channel types can exist independently of catchment hydrology
	Byrne, Colin F.1; Pasternack, Gregory B.1; Guillon, Herve 1; Lane, Belize A.2; Sandoval-Solis, Samuel 1
通讯作者	Byrne, Colin F.
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2020
卷号	45 期号:9 页码:2179-2200
英文摘要	Reach-scale morphological channel classifications are underpinned by the theory that each channel type is related to an assemblage of reach- and catchment-scale hydrologic, topographic, and sediment supply drivers. However, the relative importance of each driver on reach morphology is unclear, as is the possibility that different driver assemblages yield the same reach morphology. Reach-scale classifications have never needed to be predicated on hydrology, yet hydrology controls discharge and thus sediment transport capacity. The scientific question is: do two or more regions with quantifiable differences in hydrologic setting end up with different reach-scale channel types, or do channel types transcend hydrologic setting because hydrologic setting is not a dominant control at the reach scale? This study answered this question by isolating hydrologic metrics as potential dominant controls of channel type. Three steps were applied in a large test basin with diverse hydrologic settings (Sacramento River, California) to: (1) create a reach-scale channel classification based on local site surveys, (2) categorize sites by flood magnitude, dimensionless flood magnitude, and annual hydrologic regime type, and (3) statistically analyze two hydrogeomorphic linkages. Statistical tests assessed the spatial distribution of channel types and the dependence of channel type morphological attributes by hydrologic setting. Results yielded 10 channel types. Nearly all types existed across all hydrologic settings, which is perhaps a surprising development for hydrogeomorphology. Downstream hydraulic geometry relationships were statistically significant. In addition, cobble-dominated uniform streams showed a consistent inverse relationship between slope and dimensionless flood magnitude, an indication of dynamic equilibrium between transport capacity and sediment supply. However, most morphological attributes showed no sorting by hydrologic setting. This study suggests that median hydraulic geometry relations persist across basins and within channel types, but hydrologic influence on geomorphic variability is likely due to local influences rather than catchment-scale drivers. (c) 2020 John Wiley & Sons, Ltd.
英文关键词	channel-reach morphology multivariate classification hydrogeomorphic hydraulic geometry basin hydrology
类型	Article
语种	英语
国家	USA
开放获取类型	Green Submitted
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000533127700001
WOS关键词	RIVER CHANNEL ; HYDRAULIC GEOMETRY ; STREAM POWER ; BED MATERIAL ; ARID-REGION ; SEDIMENT ; CLASSIFICATION ; MORPHOLOGY ; FLOW ; DYNAMICS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	University of California, Davis
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319086
作者单位	1.Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA; 2.Utah State Univ, Civil & Environm Engn, Logan, UT 84322 USA
推荐引用方式 GB/T 7714	Byrne, Colin F.,Pasternack, Gregory B.,Guillon, Herve,et al. Reach-scale bankfull channel types can exist independently of catchment hydrology[J]. University of California, Davis,2020,45(9):2179-2200.
APA	Byrne, Colin F.,Pasternack, Gregory B.,Guillon, Herve,Lane, Belize A.,&Sandoval-Solis, Samuel.(2020).Reach-scale bankfull channel types can exist independently of catchment hydrology.EARTH SURFACE PROCESSES AND LANDFORMS,45(9),2179-2200.
MLA	Byrne, Colin F.,et al."Reach-scale bankfull channel types can exist independently of catchment hydrology".EARTH SURFACE PROCESSES AND LANDFORMS 45.9(2020):2179-2200.