Bankfull width and morphological units in an alpine stream of the dolomites (Northern Italy)

Vianello, Alessandro; D’Agostino, Vincenzo

doi:10.1016/j.geomorph.2006.02.023

Cited by 50 publications

(62 citation statements)

References 35 publications

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“…The trend of downstream bed material coarsening in small headwater channels (Brummer and Montgomery, 2003;Vianello, D´Agostino, 2007) was not confirmed in the studied part of the longitudinal profile for the coarsest fraction. The reported correspondence between the longitudinal stream distance from the source or the increase in the watershed area and the coarsest bed sediments, represented by the mean value of the particle-size index of the largest boulders, reflected: a) changes in the lithology of the source bedrock, as the generally coarser resistant sandstones of the Godula Member are gradually substituted by finer particles of claystone members; and b) the role of slope-channel (de)coupling processes related to the intensity and nature of sediment supply.…”

Section: Discussionmentioning

confidence: 90%

Coarse Bed Sediments in a Headwater Channel as Indicators of Fluvial Processes and Slope-Channel Coupling: A Case Study from the Carpathian Mountains (Czech Republic)

Galia¹,

Škarpich²

2013

Moravian Geographical Reports

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Section: Discussionmentioning

confidence: 90%

Coarse Bed Sediments in a Headwater Channel as Indicators of Fluvial Processes and Slope-Channel Coupling: A Case Study from the Carpathian Mountains (Czech Republic)

Galia¹,

Škarpich²

2013

Moravian Geographical Reports

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“…The Upper Cordevole river in the last decade has been the subject of several analyses of channel bed morphologies and landslide activities [Borga et al, 2002;Vianello and D'Agostino, 2007;Vianello et al, 2009]. The basin is mainly characterized by high-altitude grassland and bedrock outcrops.…”

Section: Upper Cordevole Catchmentmentioning

confidence: 99%

Recognition of surface flow processes influenced by roads and trails in mountain areas using high-resolution topography

Tarolli

Calligaro

Cazorzi

et al. 2013

European Journal of Remote Sensing

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Road networks in mountainous forest landscapes have the potential to increase the susceptibility to erosion and shallow landsliding. The same issue is observed also for minor trail networks, with evidences of surface erosion due to surface flow redistribution. This could be a problem in regions such as the Italian Alps where forestry and tourist activities are a relevant part of the local economy. This is just one among the several effects of modern anthropogenic forcing: it is now well accepted by the scientific community that we are living in a new era where human activities may leave a significant signature on the Earth, by altering its morphology, and significantly affecting the related surface processes. In this work, we proposed a methodology for the automatic recognition of roads and trails induced flow direction changes. The algorithm is based on the calculation of the drainage area variation in the presence, or in the absence of anthropic features such as roads and trails on hillslopes. To simulate the absence of alteration, the surface was smoothed considering moving windows of varying size. In the analysis, we used a 1 and 0.5 m Airborne Laser Swath Mapping technology (ALSM), using LiDAR (Light Detection And Ranging), and 0.2 m Terrestrial Laser Scanner (TLS) derived Digital Terrain Models (DTMs). The aim of the work is to underline the effectiveness of the proposed method based on high resolution topography in the detailed recognition of surface flow direction alteration due to roads, but also trail networks. We propose an automatic method to map at a large scale such alterations, also in areas where it is difficult to recognize them without a trail network surveyed in the field. This methodology could be considered as a support for modeling (i.e., terrain stability and erosion models), and it can be used to interactively assist the design of new infrastructure to reduce their effects on surface instabilities. The reported methodology 177 European Journal of Remote Sensing -2013, 46: 176-197 could also have a role in risk management and environmental planning for mountain areas where tourism and the related economic activities are critical, and where also trails deserve attention due to induced slope instabilities.

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“…If we consider larger sandstone particles as resistant bed surface layer, Montgomery and Gran [2001] found out that there is no measurable difference in the channel width between alternating bedrock and alluvial reaches in channels cut into weak rocks here represented by claystones. Generally, a strong dependence between bankfull width and watershed area was reported by Golden and Springer [2006] and Vianello and D'Agostino [2007] in steep headwaters. Brummer and Montgomery [2003] also documented a strong dependence between these two parameters, although slightly lower coefficient of determination was observed in channels affected by debrisflows.…”

Section: Resultsmentioning

confidence: 89%

“…The channel geometry of the headwater channel is the result of various shaping factors owing to the strong hillslope-channel coupling, occurrence of vertically oscillating bedforms, usually coarse bed sediments, influence of additional roughness parameters (bedrock outcrops, large woods) and usually limited sediment supply [Whiting et al 1999, Gomi et al 2003, Hassan et al 2005, Comiti and Mao 2012. Despite these facts, the relationship between the bankfull width (W) and the watershed area (A) expressed by the following power law with c and d coefficients [Leopold and Maddock 1953] is often used even for small mountain channels [Brummer and Montgomery 2003, Golden and Springer 2006, Vianello and D'Agostino 2007, Wohl and Merritt 2008, Galia and Hradecký 2014:…”

Section: Introductionmentioning

confidence: 99%

Bankfull widths in steep headwaters of the flysch Carpathians

Galia

Škarpich

2015

ASP FC

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abstract. Bankfull widths of steep headwater channels were examined in the Western Carpathian flysch midmountains. The criteria of the top of banks, scoured lines and pre sence of bank vegetation were helpful in the bankfull width determination. A direct downstream relationship between the parameters of the bankfull width and the watershed area and a negative downstream relationship between the parameters of the bankfull width and the channel gradient were observed in all examined channels similarly to lower gradient rivers. However, streams based in more resistant sandstone flysch and/or influenced by small debrisflows indicated much less dependence between these parameters. Significant differences in bankfull widths were found when channels of the same watershed areas, but located on leeward and windward hillslopes were compared.

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Bankfull width and morphological units in an alpine stream of the dolomites (Northern Italy)

Cited by 50 publications

References 35 publications

Coarse Bed Sediments in a Headwater Channel as Indicators of Fluvial Processes and Slope-Channel Coupling: A Case Study from the Carpathian Mountains (Czech Republic)

Coarse Bed Sediments in a Headwater Channel as Indicators of Fluvial Processes and Slope-Channel Coupling: A Case Study from the Carpathian Mountains (Czech Republic)

Recognition of surface flow processes influenced by roads and trails in mountain areas using high-resolution topography

Bankfull widths in steep headwaters of the flysch Carpathians

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