In this analysis attention is paid to hydrological and geomorphological aspects of the transport of suspendedload along the Parseta river as effects of processes taking place in the catchment area. The transport of the sediment load varied over
Relationship between suspended sediment load, channel geometry and land area increment in the Yellow River Delta
Channel geometry ; China ; Delta ; Environmental management ; Huang He ; Human impact ; Hydraulic works ; Sediment transport ; Stream ; Suspendedload
The aims of this work are : to determine what is the critical suspended sediment load needed in order to maintain the land balance of the Yellow River Delta for 2 periods before and after 1976 (the last time the channel shifted); and to examine
the variation in the channel geometry and gradient in response to changes in sediment load and delta area at the river mouth. These results are of importance for the management of the lower Yellow River channel and the delta.
The suspended sediment discharge of the River Euphrates at Haditha, Iraq : an assessment of the potential for establishing sediment rating curves
The results presented indicate that in this case, suspended sediment rating curves established using infrequent samples (2 - 4 samples per month) can be employed to provide estimates of annual loads and of mean annual loads which are within 20
% and 5 % of the actual loads respectively. This level of accuracy is likely to be acceptable for most applications.
Suspended sediment load in the turbidity maximum zone at the Yangtze River Estuary : The trends and causes
China ; Estuary ; Hydrology ; Sediment budget ; Sediment transport ; Suspendedload ; Turbidity ; Yangtze
Based on the analysis of suspended sediment elements at estuaries, influence of human activities and estuarine regulation projects on the turbidity maximum zone was studied according to the measurement data between 1959 and 2011. It was found
that human activities had little effect on the seaward water while the sharp decrease of sediment volume and concentration in runoff led to the sharp decrease of turbidity maximum zone in the estuary. The suspended sediment concentration in North Passage
Use of composite fingerprints to determine the provenance of the contemporary suspended sediment load transported by rivers
England ; Flood ; Multivariate analysis ; Seasonal variation ; Sedimentology ; Stream ; Suspendedload ; United Kingdom ; Watershed
Sediment fingerprinting appears to offer a valuable alternative to direct monitoring for elucidating the provenance of suspended sediment and the relative importance of spatial zones or subcatchments comprising larger drainage basins. Against
this background, a quantitative composite fingerprinting technique, incorporating both statistically verified multicomponent signatures and a multivariate sediment-mixing model, has been employed to determine the spatial origin of contemporary suspended sediment
Correction factors for estimating suspended sediment export from loess catchments
Belgium ; Grain size distribution ; Loess ; Sediment transport ; Soil erosion ; Suspendedload ; Watershed
This study focuses on problems related to estimating the exact exported suspended sediment quantity and quality from flow-proportional samples taken at a fixed height at the outlet of a small, agricultural catchment in central Belgium
. The application of 2 correction factors, one for the water depth and one for the concentration gradient, leads to a reduction of the estimated total sediment export. This paper therefore emphasizes that point sampling of suspended sediment is biased
Suspended sediment outflow from the Cachi reservoir during the flushing in 1990
Applied hydrology ; Catchment area;Watershed ; Costa Rica ; Dam ; Hydraulic works ; Suspendedload ; Turbidity
A method is presented to estimate the deposition of suspended material in reservoirs. Morphology of the reservoir, flow conditions including the occurrence of turbidity currents, duration of water discharges, suspended sediment inflow and grain size
High spatial and spectral resolution sensors such as Landsat Thematic mapper were usually used to estimate the suspended sediment concentrations in the coastal zones. When studying the suspended sediment concentration in Danshui River in Taiwan
, SPOT image was used because of its higher spatial resolution and this river being not as wide enough as the coastal area. Composite of band1 and band2 was found the best combination to express the suspended sediment. And the relationship of river
suspended sediment and its environmental background was analyzed by overlaying the map of suspended sediment, vegetation type and pollution resources.
Catchment size and contribution of the largest daily events to suspended sediment load on a continental scale
Canada ; Climate ; Data base ; Flood ; North America ; Precipitation ; Rainstorm ; Sediment transport ; Spatial analysis ; Spatial scale ; Suspendedload ; United States of America ; Water erosion ; Watershed
The AA. used 2 massive datasets of daily suspended sediment load facilitated by the United States Geological Survey (i.e. USGS Ancillary database), and the Hydrological Service of Canada (i.e. HYDAT dataset). The whole study area covers most
of the temperate and sub-polar latitudinal climate conditions. The data from more than 1800 catchments show that the contribution of few events represents a high proportion of the total basin suspended sediment load. The analysis suggests that the relative
contribution of different n-largest aggregated daily events on total suspended sediment load decreases as catchment size increases. This is a general pattern and means that, for instance, time compression of suspendedload is exacerbated in small catchments
; hence, relatively few events are the key to explain the catchment sediment export. In addition, the relative contribution of the n-largest daily event to the suspended sediment load seems to be independent of climate conditions in small catchments.
Energetics prediction of frequency-dependent suspended sand transport rates on a macrotidal beach
Beach ; Coastal dynamics ; Coastal environment ; England ; Forecast ; Intertidal zone ; Model ; Sand ; Sediment transport ; Suspendedload ; United Kingdom ; Wave ; Yorkshire
-shore transport processes : that associated with the short (incident) waves, that due to the long infragravity waves, and transport associated with the mean flow. Comparison of the suspendedload velocity moment predictions with field measurements
In this paper, simple energetics modelling is used to compare velocity moment predictions with field observations of suspended sand transport rates. Separate consideration is given to transport associated with the 3 main frequency-dependent cross
is then used to assess the validity of this energetics approach in the prediction of cross-shore suspended sand transport fluxes.
Predictability of river flow and suspended sediment transport in the Mississippi River basin : a non-linear deterministic approach
Determinism ; Discharge ; Forecast ; Mississippi ; Missouri ; Stream ; Stream flow ; Suspendedload ; United States of America ; Watershed
. For implementation, river flow and suspended sediment transport variables observed at the St. Luois (Missouri) station are studied. Specifically, daily water discharge, suspended sediment concentration and suspended sediment load data are analysed
Anthropogenic changes in the suspendedload transportation by and sedimentation rates of the river Vistula, Poland
Alluvium ; Carrying capacity ; Dam ; Floodplain ; Human impact ; Hydraulic works ; Poland ; Stream ; Suspendedload ; Wisła
Evidence is presented that regulation works on the Vistula channel have introduced very significant and rapid changes in the magnitude of river load transportation and sedimentation. It is acknowledged that human interference represents the most
significant cause of change in the Vistula catchment within historical times. The alluviation of the Vistula valley floodplain as described here, which was initiated about 150 years ago, may be compared with the equally rapid changes of load transportation
Estimated transport of the suspendedload of the River Malewa, Kenya, between 1931-1959
The aim of this study is to evaluate the usefulness of a data set of the suspended sediment concentration in the River Malewa, Kenya. One important benefit of such an evaluation is to acquire fundamental knowledge about the transport characteristics
Source identification of suspended sediment from grain-size distributions : I. application of nonparametric statistical tests
Grain size distribution ; Hokkaido ; Japan ; Sedimentology ; Statistics ; Suspendedload ; Tracer ; Watershed
In this study, a new technique for identifying the source of suspended sediment is described, based on a comparison of overall grain-size distributions. Suspended sediment flux (SSF) supplied from sediment generated by logging and deposited
on hillslopes, and that from unpaved road surface, were obtained in the Hiyamizusawa Brook basin, Hokkaido. The ratio between SSF from deposited sediment fines (DSF) and that from suspended sediment in the road surface flow (SSR), i.e. the ratio DSF:SSR
, was estimated from grain-size distributions of the river-suspended sediment based on nonparametric statistical tests.
Fitting concentration and load rating curves with generalized linear models
Carrying capacity ; England ; Illinois ; Model ; Northern England ; Statistics ; Stream ; Suspendedload ; United Kingdom ; United States of America
for suspended sediment concentration for an upland stream in the Northern Pennines and for phosphorus load for the Illinois River.
Generalized linear models may be used as a systematic and flexible alternative to existing practices in fitting sediment or solute concentration and load rating curves. In particular, they offer a one-step solution to the common and ackward problem
that a bias correction is needed when estimating total loads. As generalized linear models return predictions directly on the original measured scale, there is no need for back-transformation or subsequent correction factors. Example analyses are given
This paper presents a comparison of different fractional bed-material load computation methods in sand-bed channels. These methods include the direct computation by size fraction approach of Einstein, Laursen and Toffaleti; the bed material fraction
Using Chernobyl-derived fallout radionuclides to investigate the role of downstream conveyance losses in the suspended sediment budget of the River Severn, United Kingdom
England ; Floodplain ; Geochemistry ; Radioactivity ; Sediment budget ; Suspendedload ; United Kingdom ; Watershed
basin of the River Severn. The results relate to a 3-year period, 1986-1989, and indicate that conveyance losses associated with floodplain and channel storage respectively accounted for 23% and 2% of the total suspended sediment load passing through
This contribution descibes how measurements of the fate of Chernobyl-derived 134Cs have been used to investigate the role of downstream conveyance losses associated with channel and floodplain storage in the suspended sediment budget of the 6850 km2
Suspended sediment concentration measurements were undertaken for 10 months in selected stream discharge measuring stations within the Pra Basin by coupling dip and integrated sampling approaches. Samples were analyzed using the evaporation method
. Daily mean suspended sediment concentration was calculated from which monthly and annual suspended sediment yields were derived. Suspended sediment concentration and sediment yield were found to be very high.