Observations on the movement of coarse gravel using implanted motion‐sensing radio transmitters

McNamara, J. P.; Borden, Carter

doi:10.1002/hyp.1453

Cited by 73 publications

(54 citation statements)

References 14 publications

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“…In fact, previous studies demonstrated that the handling of sediments causes the disruption of surface structures (i.e., clusters) and can increase sediment transport by decreasing the critical shear stress Oldmeadow and Church, 2006). A second advantage is the possibility of monitoring a wide range of grain sizes, whereas other tracing techniques [such as motion-sensing radio transmitters (McNamara and Borden, 2004) or passive integrated transponder tags (Lamarre et al, 2005)] are adoptable only for coarse sediments. Finally, the analysis can rely on a large number of particles, because hundreds or thousands of particles (approximately from 1000 to 3000 in our study) are included in a small area (e.g., 0.8× 0.8 m).…”

Section: Advantages and Drawbacks Of The Methodsmentioning

confidence: 98%

Observations on sediment mobility in a large gravel-bed river

Mao

Surian

2010

Geomorphology

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Section: Advantages and Drawbacks Of The Methodsmentioning

confidence: 98%

Observations on sediment mobility in a large gravel-bed river

Mao

Surian

2010

Geomorphology

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“…The size and travel distance of mobilized grains can be estimated using painted pebbles (Leopold et al, 1966;Billi, 1988;Petit et al, 2005a), tracers containing iron or magnets (Hassan, 1990;Schmidt and Ergenzinger, 1992;Gintz et al, 1996;Ferguson et al, 2002), PIT-tag (Lamarre et al, 2005;Rollet et al, 2008) or active (radio) tracers (Ergenzinger et al, 1989;Busskamp and Hasholt, 1996;MacNamara and Borden, 2004). These methods evaluate bedload mobility over a relatively short timescale.…”

Section: Introductionmentioning

confidence: 99%

Long-term bedload mobility in gravel-bed rivers using iron slag as a tracer

et al. 2011

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Bedload dispersion is evaluated in gravel-bed rivers using slag elements from ironworks established along rivers in the Ardenne region, between the fourteenth and the nineteenth centuries. Large quantities of slag were dumped close to these rivers or even directly into the channels. For centuries, slag elements were dispersed in the bedload and transported by floods of varying importance. Consequently, slag may be considered as a reliable tracer to analyze bedload dispersion over several centuries. The size of slag elements was studied along 16 Ardenne rivers. The longitudinal size trend of the largest slag particles allows the effective competence of these rivers to be determined (between 19 and 129 mm for rivers where specific stream power for the bankfull discharge ranges between 20 and 134 W/m²). A direct relationship doesn't exist between these two parameters as the size of slag elements must be considered with regard to the D 50 of the bed. Selective transport was analyzed directly downstream of the input sites. The sorting distance varies from river to river and depends on the velocity of the coarse elements introduced into the river since the inception of the iron industry. Downstream of two metallurgic sites, the slag propagation fronts were located. As the periods of activity at these sites are known from historical studies, the virtual velocity of bedload movement in these rivers was estimated to be 2-4 km/century.

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“…Elles ont été obtenues au moyen de trappes à charge de fond automatiques, de type Birkbeck. L'utilisation de radio émetteurs pour le traçage des particules sur une rivière à forte pente (2,6 %) de l'Idaho a permis d'analyser finement les périodes de déplacement et de repos de la charge grossière et le couplage de ces informations avec les hydrogrammes de crues a montré des * c compris entre 0,027 et 0,063 (McNamara et Borden, 2004). proposent une gamme comprise entre 0,030 et 0,086 d'après la compilation de 80 années d'étude de transport solide dans les rivières à charge graveleuse.…”

Section: Discussionunclassified

La mobilité de la charge de fond des rivières torrentielles méditerranéennes

Liébault¹,

Clément

2009

gpq

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La mobilité de la charge de fond de trois affluents de la Drôme (Barnavette, Béoux et Esconavette) a fait l’objet d’un suivi événementiel entre 1997 et 2002, au moyen d’un dispositif de terrain relativement simple permettant de mesurer les phénomènes de creusement et de remblaiement du lit, ainsi que la mise en mouvement des particules. Trois stations de mesure comprenant un ou plusieurs profils en travers pour le suivi topographique, un ensemble de chaînes d’érosion, des traceurs colorimétriques et un équipement d’enregistrement des hauteurs d’eau maximales ont été installés à proximité de l’exutoire des trois affluents. Cet équipement a permis de caractériser la fréquence du charriage (6 à 7 crues mobilisatrices par an en moyenne), les distances de transport de la charge de fond (en moyenne entre 450 et 470 m par an) et les seuils de mise en mouvement. Les résultats obtenus sont en adéquation avec les valeurs communément observées dans les rivières à forte pente, avec des forces tractrices critiques adimensionnelles comprises entre 0,031 et 0,076.Event-based bedload mobility of three tributaries to the Drôme River (Barnavette, Béoux and Esconavette) was monitored between 1997 and 2002, with field devices allowing the measurement of scour and fill processes, and individual particles displacements. Three field sites including one or two resurveyed cross sections, a set of scour chains, painted tracers and one crest stage gauge were installed near the outlet of the streams. This equipment allowed the characterization of the frequency of bedload transport, the hydraulic conditions for incipient motion and the distances of transport of individual grains. We observed that an average of 6 to 7 competent flow events per year occurred during the study period. The annual distances of transport of coarse particles range between 450 and 470 m. The thresholds of motion for bedload transport are similar to the values published for small gravel-bed rivers, with dimensionless critical shear stress between 0.031 and 0.076

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Observations on the movement of coarse gravel using implanted motion‐sensing radio transmitters

Cited by 73 publications

References 14 publications

Observations on sediment mobility in a large gravel-bed river

Observations on sediment mobility in a large gravel-bed river

Long-term bedload mobility in gravel-bed rivers using iron slag as a tracer

La mobilité de la charge de fond des rivières torrentielles méditerranéennes

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