Understanding watershed suspended sediment transport
This paper synthesizes a variety of methods adopted in suspended sediment monitoring, estimation and modelling for understanding sediment transport processes and determining the suspended sediment load. Methods for sediment monitoring are described
in terms of direct and indirect approaches. Different approaches toward the establishment of a sediment rating curve are examine thoroughly. Techniques of sediment modelling are summarized via depiction of various hydrological and sediment models
at the watershed scale. The paper ends with the discussion of future developments in suspended sediment studies at the watershed scale.
This study aims to quantify flood-based sediment yields in 2 highly active headwater catchments in the upper Isábena River : Villacardi and Cabecera. The results are compared with the sediment delivery from a zero-order badland catchment
and the sediment yield at the outlet of the basin, upstream of the reservoir. A novel regression aproach is applied that allows the interpolation of intermittent measurements of suspended sediment concentrations, computes confidence intervals for these estimates
Downstream variation in bed sediment size along the East Carpathian rivers : evidence of the role of sediment sources
Carpathian Mountains ; Drainage network ; Grain size distribution ; River bed ; Romania ; Sediment budget ; Sediment load ; Sedimentology ; Stream ; Suspended load
This paper intends to approach the phenomena of river-bed material variability inside a network of rivers from the drainage basin of Siret as a link between sediment sources and their sediment delivery. The AA. will focus on the spatial variability
sediment through the Carpathian tributaries, while the second mode, of the sands, is local.
in seabed sediments, and discuss their implications for tracing organic matter source; and calculate contributions of different organic matter sources in seabed sediments.
Le but de cette étude est de montrer et d'établir les bénéfices et les limites du géoradar dans un terrain proglaciaire. En particulier, cette technique aide à différencier la structure interne de sédiments gelés faiblement triés.
Sediment transport rate-based model for rainfall-induced soil erosion
Experimentation ; Mathematical model ; Model ; Overland flow ; Precipitation ; Rainfall simulation ; Sediment transport ; Soil erosion ; Water erosion
A one-dimensional mathematical model, termed sediment transport rate-based model, is developed for determining rainfall-induced soil erosion and sediment transport. A series of soil flume experiments under simulated rainfall were conducted
to simulate the overland flow and sediment transport and to test the sediment transport rate-based model. The numerically simulated hydrographs, sediment transport rate and concentration distributions are in good agreement with those measured in laboratory
Impacts of dams on the sediment flux of the Pearl River, southern China
China ; Dam ; Hydraulic works ; Impact ; Quantitative analysis ; Reservoir ; Sediment budget ; Sediment transport ; Southern China ; Stream ; Xi Jiang
Based on datasets begun in the 1950s of water and sediment flux at the main gauging stations and measured deposition rates in some reservoirs, this paper examines the impact of dam construction on the sediment flux of the Pearl River. The results
and conclusions show that the sediment flux of the Pearl River has shown a drastically decreasing trend since the mid-1980s, which is attributed mainly to deposition in the reservoirs. A further decrease in sediment flux into the sea is expected to occur
The behavior of specific sediment yield in different grain size fractions in the tributaries of the middle Yellow River as influenced by eolian and fluvial processes
Aeolian features ; China ; Dust storm ; Erosion ; Fluvial processes ; Grain size distribution ; Huang He ; Precipitation ; Sediment budget ; Sediment load ; Suspended load ; Watershed
Based on data from 35 stations on the tributaries of the Yellow River, annual specific sediment yield in 8 grain size fractions has been related to basin-averaged annual sand-dust storm days and annual precipitation to reveal the influence of eolian
and fluvial processes on specific sediment yield in different grain size fractions. The period from which the data were used is from 1950 to 1970 as basin-wide erosion and sediment control measures have not yet been practiced during this period, and human
impact on sediment producing and transporting processes was relatively small.
Quantification de haute précision de l'apport de sédiments du versant à la rivière. Résultats préliminaires du transport de la charge de rivière dans la première saison après l'événement de terrain et comparaison avec l'introduction de sédiments de
leurs principales sources. Etablissement d'un bilan sédimentaire préliminaire pour l'étude de la mouille du lit. Mise en lumière de l'influence de l'apport de sédiments supérieurs sur le transport de sédiments vers l'aval et l'hydrologie.
Impact of deposition on the enrichment of organic carbon in eroded sediment
Field experiment ; Organic materials ; Sediment transport ; Sedimentary ; Soil erosion ; Topography ; Vegetation ; Watershed
Examen de l'enrichissement en carbone organique dans les sédiments transportés en relation avec les dépôts induits par la topographie et la végétation.
Relationships among rainfall, runoff, and suspended sediment in a small catchment with badlands
The Araguás Catchment of the Central Spanish Pyrenees has been monitored since 2004 to study weathering erosion, as well as the hydrological and sediment responses to rainfall in order to understand the dynamics of a badland area in a relatively
humid environment. This paper focuses on relationships among rainfall, runoff, and suspended sediment. One objective is to distinguish different hysteretic loops for single flood events and determine the relationships between the types of hysteresis
Sediment release and storage in early deglaciated areas : towards an application of the exhaustion model from the case of Massif des Ecrins (French Alps) since the Little Ice Age
Alps (The) ; Deglaciation ; France ; Glacier ; Little ice age ; Paraglacial ; Sediment budget ; Sediment transfer
Mesure des impacts du déclin de ce glacier sur le fonctionnement du système sédimentaire de cascade en comparant le signal de rupture (variations du glacier) avec le signal de réponse (transferts des sédiments).
Benthos ; European part of Russia ; Hydrocarbon ; Hydrochemistry ; Karelia ; Lacustrine sediment ; Micro-organism ; Oil product ; Onega Lake ; Pollution ; Spatial distribution
Composition en hydrocarbures de pétrole dans les sédiments de fond. Réaction du bactériobenthos à la pollution des limons par les produits pétroliers.
Examen d'exemples de l'impact de la teneur en matière organique, composés d'Al et de Fe dans les sédiments d'eaux douces sur le flux de P depuis le fond.
Structural composition and sediment transfer in a composite cirque glacier : Glacier de St. Sorlin, France
Cirque ; Fluvioglacial features ; France ; Glacier ; Glacier dynamics ; Meltwater ; Model ; Moraine ; Rhône-Alpes ; Sediment transport
This paper considers the links between structure, sediment transport and sediment delivery at Glacier de St. Sorlin, French Alps. The conclusion of this study is that at Glacier de St. Sorlin proglacial sediment-landform associations are subjected
to intense syn- and post-depositional modification by high melt-water discharges, hence their composition does not reflect that of sediments melting out at the terminus. The action of melt water limits the potential of the sedimentary record to be used
The goal of this study is to estimate suspended sediment load in the Mellah wadi, Seybouse basin, using the sediment rating curve technique on data from a 23-year period. The analysis is based on frequent suspended sedument concentration
measurements during a great number of storms. Sediment transport is dominated by winter storms. A high exponent b of the power regression equation during the winter season confirms the intense geomorphic work by winter season storms caused by high intensity
Improving precision in sediment source and erosion process distinction in an upland catchment, south-eastern Australia
Australia ; Bank erosion ; Erosion ; Gully erosion ; Isotope analysis ; New South Wales ; Sediment budget ; Sedimentology ; Slope gradient ; Watershed
In this study Cs 137 and Pb 210 were used to determine surface and sub-surface source contributions of fine sediment in a small upland headwater catchment in the Central Tablelands region of New South Wales. The findings from this analysis
are employed in an adjustment procedure to better differentiate sediment source erosion processes by utilising channel survey and erosion pin data. Variability in sediment source contributions within the catchment was high, with rapid transition from hillslope
to channel source dominance of sediment flux with distance downstream in the study catchment.
Temporal variation in downstream sediment transfer in the Lower Yellow River
China ; Huang He ; Human impact ; Hydraulic works ; Sediment transport ; Soil conservation ; Stream ; Twentieth Century ; Water resources ; Watershed
An index of sediment transferring function (Fs) is applied in this study to reveal the temporal variation in the downstream sediment transfer of the Lower Yellow River. It is found that in the past 50 years, this sediment transferring function index
, the changing drainage basin factors have resulted in the decrease in the sediment transferring function of the Lower Yellow River.
A suspended sediment budget of the Yichang-Wuhan reach of the Yangtze River, China
Carrying capacity ; China ; Human impact ; Multiple regression ; River bed ; Sediment budget ; Stream ; Suspended load
The amount of the sediment deposition in the Yichan-Wuhan reach of the middle Yangtze River has been determined using the concept of sediment budget at the channel-reach scale. The fill-scour processes of the middle Yangtze River were studied during
the period 1956-1997 in response to the variation in sediment load and flow inputs. Multiple regression equations have been established to assess the contributions of influencing factors to the variation in sediment deposition amount in the studied river
Using a dataset up to 8 years long in the Lower Chabagou Creek, the variability in suspended sediment load at different temporal scales (within-flood variability, monthly-seasonal and annual) is analyzed in this paper. The results show
that, on the within-flood scale, most of the sediment peaks lag behind peak discharges, implying that slope zones are the main sediment source area; independent of the occuring sequences of the peaks of sediment and discharge, all the events could present an anti
-clockwise hysteresis loop resulting from the abundant material and the influence of hyperconcentrated flows on suspended sediment concentration. At monthly and seasonal scales, there is a store-release process, i.e. sediment is prepared in winter, spring
and late autumn, and exported in summer and early autumn. At the annual scale, the high variability in concentration and sediment yield are highly correlated with water yield, resulting from the number and magnitude of floods recorded yearly, and almost all