Introduction: River Confluences, Tributaries and the Fluvial Network

Rice, Stephen P.; Rhoads, Bruce L.; Roy, Alain

doi:10.1002/9780470760383.ch1

Cited by 34 publications

(45 citation statements)

References 72 publications

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“…Channel disturbances are amplified at confluences because these locations are points that accumulate water, sediments, and woody debris (Benda et al 2004a;Benda et al 2004b;Rice et al 2006;Rice et al 2008). Water movement can strongly affect the distribution of vegetation types throughout floodplains, as such forces alter the physical structure and stability of the habitat through erosion and sedimentation (Salo et al 1986).…”

Section: The Means (±Sd) Of Shannonmentioning

confidence: 99%

“…In river ecosystems, flooding-induced disturbances, which pro-*Address correspondence to this author at the Graduate School of Human Development and Environment, Kobe University, 3-11, Tsurukabuto, Nadaku, Kobe city, Hyogo pref,Japan;Tel: +81.78.803.7882;Fax:+81.78.803.7820; Handling Editor: Philip H. Crowley vide the most dynamic and complex biophysical habitats (Naiman et al 1993;Burkart 2001), occur more frequently at confluences (Benda et al 2004b). Thus, confluences are considered to increase spatial and temporal habitat heterogeneity (Benda et al 2004a;Benda et al 2004b;Rice et al 2008). Benda et al (2004a, b) reviewed several cases of habitat creation by confluences, e.g., the formation of fans and erosion-resistant deposits, which may influence biodiversity (Benda et al 2004a;Benda et al 2004b).…”

Section: Introductionmentioning

confidence: 99%

“…We used the RNER riparian vegetation data to determine whether diversity in vegetation patches, which serve as potential habitat, increases around confluences of Hyogo Prefecture rivers. High physical heterogeneity may augment biological diversity via the well-established principle that biological diversity tends to increase with habitat variability (Benda et al 2004b;Rice et al 2008).…”

Section: Introductionmentioning

confidence: 99%

“…River confluences, which correspond to the nodes of dendritic river networks, are known to exhibit particular hydrodynamic traits (Rhoads & Kenworthy 1995;De Serres et al 1999;Benda et al 2004a;Benda et al 2004b;Rice et al 2008) that result in many geomorphically diverse habitats (Benda et al 2004b;Rice et al 2008). In river ecosystems, flooding-induced disturbances, which pro-*Address correspondence to this author at the Graduate School of Human Development and Environment, Kobe University, 3-11, Tsurukabuto, Nadaku, Kobe city, Hyogo pref,Japan;Tel: +81.78.803.7882;Fax:+81.78.803.7820; Handling Editor: Philip H. Crowley vide the most dynamic and complex biophysical habitats (Naiman et al 1993;Burkart 2001), occur more frequently at confluences (Benda et al 2004b).…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Diversity at Network Nodes: River Confluences Increase Vegetation-Patch Diversity~!2010-03-22~!2010-04-30~!2010-07-07~!

Osawa¹,

Mitsuhashi²,

Niwa³

et al. 2010

TOECOLJ

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Although dendritic networks within ecosystems have typically been considered a special case of network topology, they have attracted a great deal of attention in recent years. These systems exhibit unique features in that both the nodes and branches provide distinct habitats. Within a river discontinuum context, river confluences, which are nodes of dendritic river networks, are hypothesised to have particular hydrodynamic traits that create heterogeneous habitats through a unique disturbance regime, although this hypothesis has not yet been tested. We tested this hypothesis using a vegetation data set collected from 14 river basin systems in Hyogo Prefecture, Japan. We compared vegetation-patch diversity between confluence and single-flow areas using hierarchical Bayesian models. Our results demonstrated greater vegetation-patch diversity in confluence areas compared to single-flow areas. Our findings support the hypothesis that confluences result in highly heterogeneous habitats. To the best of our knowledge, this is the first empirical report to demonstrate that river confluences have high vegetation-patch diversity. We conclude that network nodes play an important role in maintaining the biodiversity of river networks.

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Section: The Means (±Sd) Of Shannonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Diversity at Network Nodes: River Confluences Increase Vegetation-Patch Diversity~!2010-03-22~!2010-04-30~!2010-07-07~!

Osawa¹,

Mitsuhashi²,

Niwa³

et al. 2010

TOECOLJ

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“…La definición de este origen presenta alguna controversia actualmente según la fuente de consulta siendo también reconocido como origen a la confluencia del río Penitente con el río Turbio siendo el Rubens solo un tributario del Penitente (CFI, 1961;Niemeyer, 1982). Una confluencia de ríos consiste en una interface de éstos en la que ocurren importantes procesos físicos como resultado de la mezcla de sus aguas, condicionando cambios en éstas y en sus lechos aguas abajo del punto de unión y que difieren de las particularidades propias de cada curso aguas arriba, mientras que una afluencia consiste en un curso menor que vierte sus aguas en uno de mayor importancia (Roy, 2008;Rice, 2008). No se dispone aún de estudios hidrológicos que permitan concluir sobre el tema, por lo que por la importancia de los caudales involucrados se consideró, a efectos del presente trabajo, la definición planteada en la cartografía oficial, asumiendo su origen en la confluencia de Rubens y Penitente.…”

Section: Río Gallegos En Puente Blancounclassified

Hidrología superficial de la Región Hidrográfica del río Gallegos (Sur de la provincia de Santa Cruz, Argentina)

Diaz¹,

Monserrat²,

Tiberi³

et al. 2016

ICTUNPA

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RESUMENLos recursos hídricos de superficie han sido escasa y esporádicamente estudiados en la región del río Gallegos. Se carece actualmente de datos fundamentales sobre su dinámica pasada, producción actual de aguas y tendencias. Esta región reviste gran importancia económica por el tipo e intensidad de su economía por lo que el establecimiento de conocimiento básico del recurso resulta fundamental para asegurar su apropiada gestión. Se realizó una compilación de antecedentes, series hidrométricas continuos y datos dispersos de la región, procedentes de una diversidad de estudios, informes técnicos, publicaciones y trabajos de investigación recientes. Se analizó la producción mensual, estacional y anual de aguas de superficie en cursos principales y tributarios del río Gallegos. En términos generales la información hidrológica disponible, procedente de unas pocas estaciones de monitoreo en un territorio extenso, resulta escasa, dispersa y discontinua, no obstante lo cual se pudo realizar una aproximación preliminar del comportamiento del agua en superficie y su variabilidad espacial a escala de cuenca, así como identificar vacíos de información y conocimiento que podrían orientar líneas de investigación y trabajo futuros. Los río Rubens y Penitente aportan conjuntamente, entre los pocos tributarios del sistema hidrográfico, los mayores caudales mensual y estacional. Los regímenes fluviales predominantes evidencian una dependencia de las precipitaciones de otoño-invierno y fusión de nieve estacional. En términos generales las tendencias observadas revelan un ligero incremento en los caudales medios anuales y mensuales hacia 2014 con la excepción de ríos tributarios del E. como el río Ci Aike/Chico, con una clara tendencia decreciente.

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River basin organization around the main stem: Scale invariance in tributary branching and the incremental area function

2014

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The incremental increase in contributing area along a main stem river, called here the incremental area function (IAF), has direct relevance to the spatial heterogeneity of environmental fluxes (water, sediment, nutrients, etc.) entering the stream from hillslopes and side tributaries. It also dictates, to a large extent, possible ecohydrologic discontinuities or transitions resulting from large tributary contributions. Mathematically, the IAF directly reflects the topological and geometrical structure of the river network and maps the two-dimensional landscape organization into a one-dimensional function. In this paper, we use two approaches to investigate the spatial heterogeneity of the IAF. First, we implement a multithreshold decomposition on IAF to study the distribution of distances between tributaries as a function of the imposed threshold contributing area and verify the presence of a simple power law scaling relationship between the threshold and the average distance between tributaries. Second, we use a wavelet-based multiscale approach and document the presence of statistical self-affinity (multifractality) in the IAF with a high intermittency coefficient, reflecting the complex arrangement of extreme contributions of different size tributaries. We propose a multiplicative cascade model, parameterized in terms of basin-specific properties, to statistically simulate the IAF along the main stem. Finally, we point out the relation between the IAF and the widely used width function of a basin and show how the latter can be constructed from the former via a convolution on the self-similar structure of a tree.

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Introduction: River Confluences, Tributaries and the Fluvial Network

Cited by 34 publications

References 72 publications

Enhanced Diversity at Network Nodes: River Confluences Increase Vegetation-Patch Diversity~!2010-03-22~!2010-04-30~!2010-07-07~!

Enhanced Diversity at Network Nodes: River Confluences Increase Vegetation-Patch Diversity~!2010-03-22~!2010-04-30~!2010-07-07~!

Hidrología superficial de la Región Hidrográfica del río Gallegos (Sur de la provincia de Santa Cruz, Argentina)

River basin organization around the main stem: Scale invariance in tributary branching and the incremental area function

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