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DOI	10.1016/j.jsames.2020.102522
	Do the morphological characteristics of Chilean gravel-bed rivers exhibit latitudinal patterns?
	Ulloa, H.1; Iroume, A.2; Picco, L.3,4,5; Vergara, G.6; Sitzia, T.3; Mao, L.7; Mazzorana, B.1
通讯作者	Ulloa, H.
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN	0895-9811
出版年	2020
卷号	99
英文摘要	Gravel-bed rivers exhibit remarkable dynamics and distinctive morphological patterns which influence the biological processes, as well as the river ecosystem resilience to human impacts. Classifications of river ecosystems into groups with morphologically distinct patterns are therefore of paramount importance for a better understanding of their dynamics, their management and conservation. Investigations on fluvial morphology and the related dynamics in Chilean gravel-bed rivers are still scarce, and, so far, no efforts have been made to identify latitudinal patterns of their morphological characteristics that may serve as a basis for further classification purposes. In fact, the great variability in bio-geographic, climatic, geologic and geomorphologic settings of the country offer an almost unique opportunity to study how the morphological characteristics of gravel-bed rivers may vary within extremely heterogeneous environments. We performed a regional analysis of nineteen Chilean gravel-bed rivers, from semi-arid Mediterranean to rainy temperate conditions (latitude ranging from 32 degrees S to 39 degrees S). Planform characteristics within these reaches were identified through interpretation of satellite images. Topographic features of the river basins were derived from open source digital elevation models and water discharge values were obtained from available national databases. We addressed the following research questions: a) can these 19 rivers be grouped into clusters considering their distinct planform characteristics of the river channel and basin features, as related to latitudinal gradients?, b) do river morphological characteristics vary along the analyzed latitudinal gradient?, c) does the distribution of specific geomorphic units (i.e. islands) follow a longitudinal pattern?, and finally, d) are these units associated to specific hidrogeomorfic characteristics? We generated a clustering which reflects latitudinal and morphological gradients in Chilean gravel-bed rivers, with the northernmost and southernmost rivers grouped according to their distinctive hydro-morphological characteristics and geomorphic units. We also observed a general tendency of an increase in the proportion of fluvial islands relative to the active channel area from the 33 degrees Latitude in southward direction.
英文关键词	River patterns Gravel-bed river Latitudinal pattern Morphological characteristics Chile
类型	Article
语种	英语
国家	Chile ; Italy ; England
收录类别	SCI-E
WOS记录号	WOS:000528182600007
WOS关键词	BRAIDED RIVER ; RIPARIAN VEGETATION ; FLUVIAL LANDFORMS ; ALLUVIAL RIVER ; CHANNEL ; EVOLUTION ; CLASSIFICATION ; FRANCE ; SYSTEM ; REGION
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315085
作者单位	1.Univ Austral Chile, Fac Sci, Inst Ciencias Tierra, Independencia 631, Valdivia 5110566, Chile; 2.Univ Austral Chile, Fac Forest Sci & Nat Resources, Valdivia, Chile; 3.Univ Padua, Dept Land Environm Agr & Forestry, Padua, Italy; 4.Univ Austral Chile, Fac Engn, Valdivia, Chile; 5.Univ Austral Chile, Nat & Anthropogen Risks Res Ctr, RINA, Valdivia, Chile; 6.Univ Austral Chile, Fac Econ & Adm, Valdivia, Chile; 7.Univ Lincoln, Sch Geog, Brayford Pool, Lincoln LN6 7TS, England
推荐引用方式 GB/T 7714	Ulloa, H.,Iroume, A.,Picco, L.,et al. Do the morphological characteristics of Chilean gravel-bed rivers exhibit latitudinal patterns?[J],2020,99.
APA	Ulloa, H..,Iroume, A..,Picco, L..,Vergara, G..,Sitzia, T..,...&Mazzorana, B..(2020).Do the morphological characteristics of Chilean gravel-bed rivers exhibit latitudinal patterns?.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,99.
MLA	Ulloa, H.,et al."Do the morphological characteristics of Chilean gravel-bed rivers exhibit latitudinal patterns?".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 99(2020).