China ; Dune ; Echosounding ; Estuary ; Fluvial dynamics ; Grain size distribution ; Sediment load ; Sediment transport ; Sedimentology ; Yangtze
This study aims to investigate the bed features in the tide-dominated Changjiang (Yangtze) Estuary using a side-scan sonar and a depth recorder, and to examine the bed material transport pathways on the basis of the maximized gross bedform-normal
transport. The bed material migrations in terms of relative maximum gross transport show a satisfactory agreement with the sonar mapping in the dry season. The relative maximum gross transport as an independent estimator of migration direction, can be used
to effectively determine the bed material transport directions in the Changjiang Estuary.
Balance sedimentario ; Bosque ; Carga en suspensión ; Carga solida ; Cuenca hidrográfica ; Degradación del medio ambiente ; Ghana ; Transportesedimentario
Bassin-versant ; Bilan sédimentaire ; Charge en suspension ; Charge solide ; Dégradation de l'environnement ; Forêt ; Ghana ; Ghana du Sud ; Pra ; Transport sédimentaire
Le transport sur des longues distances des radionucléides dans l’atmosphère et dans les cours d’eau
Atmósfera ; Catástrofe ; Contaminación ; Contaminación radioactiva ; Corriente de agua ; Estados Unidos ; Estudio de impacto ; Rusia ; Transporte eólico ; Transportesedimentario ; Ucrania
Atmosphère ; Catastrophe ; Cours d'eau ; Etats-Unis ; Etude d'impact ; Pollution ; Pollution radioactive ; Russie ; Transport sédimentaire ; Transport éolien ; Ukraine
Aeolian transport ; Atmosphere ; Catastrophe ; Impact study ; Pollution ; Radioactive pollution ; Russia ; Sediment transport ; Stream ; Ukraine ; United States of America
Les AA. présentent les données concernant le transport des radionucléides par les cours d’eau et par l'air sur de longues distances, suite à des catastrophes et des explosions nucléaires. En utilisant les isotopes du Césium 134/ Césium 137, les AA
. ont déterminé le temps nécessaire pour le transport des radionucléides depuis la mer d’Irlande dans la mer de Barents et dans la mer Baltique.
Hillslopes, rivers, plows, and trucks : mass transport on Earth's surface by natural and technological processes
Acción antrópica ; Corriente de agua ; Geomorfodinámica ; Movimiento de masa ; Tecnología ; Transportesedimentario ; Vertiente
Action anthropique ; Cours d'eau ; Géomorphodynamique ; Mouvement de masse ; Technologie ; Transport sédimentaire ; Versant
Earth surface processes ; Human impact ; Mass movement ; Sediment transport ; Slope ; Stream ; Technology
. Technological systems with large mass-action tend to be comprised of discrete, self-powered units (e.g. trucks). Discretization of transported mass reflects the different locomotion strategy required for transport of solids on land, compared with the transport
requirements of spatially extensive fluids in nature. The principle of maximum entropy production may provide a framework for understanding the emergence of advective, technological mass-transport systems.
Dnový transport sedimentů v souvisloti s transformací geomorfologického režimu štěrkonosných toků Moravskoslezských Beskyd
Transport de la charge solide en relation avec la transition géomorphologique des lits des cours d'eau à graviers dans les montagnes de Moravskoslezské Beskydy
Carga solida ; Cauce ; Caudal ; Corriente de agua ; Geometria hidráulica ; Grava ; República Checa ; Transportesedimentario
Charge solide ; Cours d'eau ; Débit ; Gravier ; Géométrie hydraulique ; Lit fluvial ; Moravskoslezské Beskydy ; Tchèque république ; Transport sédimentaire
Channel geometry ; Czech Republic ; Discharge ; Gravel ; Moravian-Silesian Beskids mountain ; River bed ; Sediment load ; Sediment transport ; Stream
This paper summarizes the results of bedload transport research in the Morávka, Mohelnice and Ostravice basins, conducted using the BAGS (Bedload Assessment for Gravel-bed Streams) spreadsheet-based program and unit stream power empirical formulas
. The presented results only show the potential rate of bedload transport, because sediment inputs and barriers were not included into the model. The results may be applied to improve local watershed management. - (EN)
and dating the exposure time, they determined the volume of material supply into the channel during the last flood, in 2010. In-channel sediment transport was analysed on 14 cross-sections, and the channel sediment thickness was estimated using
the geophysically based ERT (Electrical Resistivity Tomography) method. The calculated total volume of sediment supply resulting from bank failures during the flood (based on dendrogeomorphic methods) was significantly lower than the calculated bedload transport
for the entire study area. This finding implies that contemporary sediment sources cannot adequately cover the transport capacity during high-magnitude flood events, and in general, in-channel erosion processes prevail.
A new approach for linking event-based upland sediment sources to downstream suspended sediment transport
Balance sedimentario ; Carga en suspensión ; Cuenca hidrográfica ; Erosión de los suelos ; Estado de Nueva York ; Estados Unidos ; Precipitación ; Transportesedimentario ; Velocidad de erosión
Bassin-versant ; Bilan sédimentaire ; Charge en suspension ; Erosion des sols ; Etats-Unis ; New York State ; Précipitation ; Transport sédimentaire ; Vitesse d'érosion
Erosion rate ; New York State ; Precipitation ; Sediment budget ; Sediment transport ; Soil erosion ; Suspended load ; United States of America ; Watershed
This approach is based on a new concept of spatial scale, sub-watershed area (SWA), defined as a sub-watershed within which all eroded soils are transported out without deposition during a hydrological event. Using (rainfall) event data collected
processes connecting sediment sources and downstream sediment transport. During small events, sediment transport in streams was at capacity and dominated by the deposition process, whereas during big events, it was below capacity and controlled
The aim of this paper is to investigate the rainfall–runoff–sediment transport relations and to assess the linearity of the hydrological and sedimentary response of the Isábena river basin, a highly dynamic Mediterranean mountainous catchment
located in the Southern Pyrenees. Moreover, this work intends to improve the understanding of the factors that control sediment transport patterns and loads in mesoscale catchments.
Concept ; Model ; Overland flow ; Sediment transport ; Soil erosion ; Statistical analysis ; Water erosion ; Watershed
The suitability of 5 sediment transport capacity functions was evaluated for overland flow conditions using graphical and statistical analysis. The results show that the application of these functions is limited to the range of hydraulic
and sediment conditions for which each was formulated. To improve predictions of transport capacity under overland flow conditions, especially at low flow intensities, a new function, based on the unit stream power concept, was derived using experimental data.
Les AA. étudient le transport de sédiments et le ruissellement dans le bassin versant de Izas (Pyrénées aragonaises) afin d’obtenir le bilan sédimentaire et d’évaluer la part relative de la période de fonte des neiges dans le transport global de
The goal of this paper is to present results of ongoing investigations on fluvial sediment transport and fluvial sediment yields during thermally and pluvially induced runoff events in the glacier-fed Erdalen catchment in Nordfjord, western Norway
Aprovechamiento hidráulico ; Balance sedimentario ; Corriente de agua ; Estados Unidos ; Geometria hidráulica ; Grava ; Represa ; Transportesedimentario
Aménagement hydraulique ; Barrage ; Bilan sédimentaire ; Cours d'eau ; Etats-Unis ; Gravier ; Géométrie hydraulique ; Snake River ; Transport sédimentaire ; Wyoming
Channel geometry ; Dam ; Gravel ; Hydraulic works ; Sediment budget ; Sediment transport ; Stream ; United States of America ; Wyoming
Calibration of the transport relations was based on bed load transport data collected over a wide range of flows on the Snake River and its 2 major tributaries within the study area in 2006 and 2007. Comparison of actual flows with unregulated flows
magnitudes, common floods are capable of mobilizing the bed material. Calculations suggest that the Snake River was not in equilibrium before construction of JLD, but was naturally in sediment deficit. This result highlights the value of transport data
Carga en suspensión ; Estadística ; Estuario ; Hidrodinámica ; Inglaterra ; Modelo ; Modelo numérico ; Reino Unido ; Serie cronológica ; Transportesedimentario
Charge en suspension ; England ; Estuaire ; Hydrodynamique ; Modèle ; Modèle numérique ; Royaume-Uni ; Statistique ; Suffolk ; Série chronologique ; Transport sédimentaire
England ; Estuary ; Hydrodynamics ; Model ; Numerical model ; Sediment transport ; Statistics ; Suffolk ; Suspended load ; Time series ; United Kingdom
This paper examines the basis for evaluating the performance of complex hydrodynamic and sediment transport models, and the quantitative and qualitative understanding that can emerge from this kind of modelling, especially in situations where data
with reference to illustrative hydrodynamic and sediment transport model results for a muddy meso-tidal estuary.
Cuenca hidrográfica ; Erosión de los suelos ; Erosión hídrica ; Erosión pluvial ; Granulometría ; Inclinación de la vertiente ; Modelo ; Parcela experimental ; Precipitación ; Propiedades del suelo ; Transportesedimentario
Bassin-versant ; Erosion des sols ; Erosion hydrique ; Erosion pluviale ; Granulométrie ; Modèle ; Parcelle expérimentale ; Pente de versant ; Propriétés du sol ; Précipitation ; Saltation ; Transport sédimentaire
Experiment plot ; Grain size distribution ; Model ; Precipitation ; Raindrop erosion ; Saltation ; Sediment transport ; Slope gradient ; Soil erosion ; Soil properties ; Water erosion ; Watershed
In this paper, the results produced by simulations using a mechanistic model of sediment transport by rain-impacted flow are used to illustrate how sediment transport by suspended load, raindrop induced saltation and flow driven saltation may