Wood as a driver of past landscape change along river corridors

Francis, Robert A.; Petts, Geoffrey E.; Gurnell, Angela M.

doi:10.1002/esp.1626

Cited by 29 publications

(19 citation statements)

References 18 publications

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“…Multi-channel systems in European and North American landscapes are known to have been more widespread in the past (Brown, 2002;Walter and Merritts, 2008;Francis et al, 2008). The presence of multiple floodplain channel systems has been reported in other river types including island-braided (Collins and Montgomery, 2002;Montgomery and Abbe 2006), and meandering gravel-bed rivers (Piégay and Gurnell, 1997;Jones, 2006).…”

Section: Logjams and The Formation And Maintenance Of Multiple Channementioning

confidence: 97%

“…In contrast, periods of low wood recruitment and supply limited transport result in channel incision, relatively stable floodplain surfaces, low rates of vertical accretion and simplification of channel pattern. Brown (2002), Gregory (2003) and more recently, Francis et al (2008) have highlighted how the role of wood in rivers has changed in response to human modification of the riparian corridor and channel form. Similarly, Coulthard and Macklin (2001) have demonstrated how substantial increases in sediment load occurs in response to both human landscape disturbance and climate change (though without the inclusion of wood in rivers).…”

Section: Long Term Dynamics and Floodplain Evolutionmentioning

confidence: 99%

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Logjam controls on channel:floodplain interactions in wooded catchments and their role in the formation of multi-channel patterns

Sear

Millington

Kitts³

et al. 2010

Geomorphology

145

110

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The role of wood in the formation and maintenance of complex dynamic floodplain surfaces is important and to date has received relatively limited attention compared to in-channel habitat processes. This paper explores the role of logjams as important agents of channel:floodplain interaction. We draw on a specific case study as well as examples from the literature to show that although the processes of interaction differ, the resulting dynamic floodplain patchwork is a common feature of rivers with logjams. In addition, we contend that the presence of logjams is an important factor in the evolution and maintenance of multiple channel patterns in both montane and lowland river environments. These observations have important implications for the definition of reference targets for river restoration. The specific results of this research show:1) The presence of a range of types of multiple channel network dissecting the floodplains of low order channels that are strongly associated with the presence of logjams. 2) The relatively rapid formation of floodplain channels following logjam formation.3) The dynamic nature of logjams within headwater channels on both seasonal and annual timescales that lead to a highly dynamic habitat mosaic on the floodplain surface. 4) An increased frequency of overbank flooding and high rates of floodplain sediment accumulation upstream of logjams and along floodplain channel networks that create the complex topography observed in the case study forested floodplains.

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Section: Logjams and The Formation And Maintenance Of Multiple Channementioning

confidence: 97%

Section: Long Term Dynamics and Floodplain Evolutionmentioning

confidence: 99%

Logjam controls on channel:floodplain interactions in wooded catchments and their role in the formation of multi-channel patterns

Sear

Millington

Kitts³

et al. 2010

Geomorphology

145

110

View full text Add to dashboard Cite

show abstract

“…Prior to and during the Quaternary, European rivers functioned naturally witha wide range of channel obstructions, most notably those caused by Eurasian beaver (Castor fiber) dams and accumulations of large wood (Coles 2006;Francis et al 2008). Wooded riparian corridors provide a variety of dead and living wood sizes, seeds and propagules directly into the channel network.…”

Section: Channel Obstructions and Secondary Transformationmentioning

confidence: 99%

Natural vs anthropogenic streams in Europe: History, ecology and implications for restoration, river-rewilding and riverine ecosystem services

Brown

Lespez

Sear

et al. 2018

Earth-Science Reviews

200

152

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“…La vegetación en esta zona está marcada principalmente por la altitud y el régimen de precipitaciones y temperaturas. (Ellenberg, 1988). Por otro lado, las formaciones de alisos se caracterizan porque no soportan los fríos intensos y no aguantan el estiaje, por lo que concentran su presencia en los tramos medios y bajos de los ríos y arroyos.…”

Section: La Sierra De Gredos Ríos Y Cuencas Analizadasunclassified

Avances en el análisis del material leñoso en ríos: incorporación, transporte e influencia en el riesgo por inundaciones

Ruíz-Villanueva

Díez‐Herrero

Pozo

et al. 2015

CyG

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de Gredos (Sistema Central), presentándose una síntesis de algunos de los resultados principales obtenidos. Como conclusión fundamental, se puede afirmar que una correcta gestión de los ríos requiere a su vez de una apropiada gestión de la vegetación de ribera y el material leñoso transportado y depositado en los mismos; y esta gestión debe encontrar el compromiso para mantener las buenas condiciones ecológicas, reduciendo en lo posible los potenciales riesgos.Palabras clave: material leñoso; detritos leñosos; riesgo de inundación; avenida. AbstractThe presence of large wood (logs, trees, branches and roots) in rivers may aggravate the consequences of flood events. This material may affect infrastructures such as bridges, weirs, etc., especially those intersecting forested mountain rivers. Until recently, a widely accepted practice (in Spain) was to systematically remove wood from river channels as a preventive measure. However, it is well known now that this practice may be useless as the material is transported and deposited after each flood. In addition, this practice might be not beneficial for the natural balance of the river ecosystem in a long term perspective. Therefore, the presence of this woody material in rivers must be managed and included in flood hazard and risk analysis. However, there is lack of studies in this respect in Spain, and therefore there is a lack of related bibliography in Spanish. In this paper we present a detailed review of recent methods proposed to analyse large wood in rivers, and in addition we propose a comprehensive methodological approach to study the role of large wood in rivers, with a focus on flood hazard. First, to understand the dynamics of wood recruitment, the contributing areas delivering wood to the streams have to be delineated and the recruitment processes studied. Thus, an estimate of the potential volume of deliverable wood can be obtained. To analyse wood transport we present a numerical model, which allows simulating the behaviour of individual pieces of wood together with hydrodynamics. These methods have been tested in several rivers in Gredos Mountain Range (Ávila, Spain), and we present here a synthesis of the main obtained results. As a final conclusion of these results we can affirm that a good river management requires a proper management of the riparian vegetation and in-stream large wood, and this management should find the equilibrium between the good ecological conditions and the potential risks.

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Wood as a driver of past landscape change along river corridors

Cited by 29 publications

References 18 publications

Logjam controls on channel:floodplain interactions in wooded catchments and their role in the formation of multi-channel patterns

Logjam controls on channel:floodplain interactions in wooded catchments and their role in the formation of multi-channel patterns

Natural vs anthropogenic streams in Europe: History, ecology and implications for restoration, river-rewilding and riverine ecosystem services

Avances en el análisis del material leñoso en ríos: incorporación, transporte e influencia en el riesgo por inundaciones

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