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Sediment Dynamics Articles & Analysis
27 articles found
The thin-film, oxygen-rich environment supports gas removal and biological processing that improves overall water quality; bottom sediment dynamics depend on system configuration and biota.What happens if the pond receives too much ...
The growth of maritime traffic in Portuguese-speaking African countries has made dredging a strategic element for the competitiveness of commercial ports, industrial terminals, and large rivers. Keeping the seabed at the correct depth means guaranteeing access to deeper draft vessels, reducing logistics costs along inland corridors, and creating new opportunities for businesses involved in the ...
While many reservoirs measure level and flow, few consider the full topography of underwater sediments that accumulate over time, reducing storage capacity and impacting water quality. LG Sonic uniquely provides bathymetry analysis through remote sensing to determine water depth and topography of underwater terrain, including both historical data and predictions of future sediment accumulation. ...
Quantitative studies on sediment release fluxes and their impact on water quality are important for water pollution control, ecological restoration, water safety, and human health. ...
A new term accounting for the sediment effect on the momentum conservation of water–sediment mixture is added to the model equations by assuming that the flow and the fixed bed is connected by an infinitesimally thin boundary layer, in which the erodible material gains the necessary velocity to enter the flow above. Comparison of numerical results and ...
Fluvial habitats are also shaped by the combined interaction of water, sediments, woody/organic material, and riparian vegetation. Water abstraction, flow regulation by dams, gravel pits or siltation by fine sediments eroded from hillslopes are pressures that can disturb interactions among water, sediments, and other constituents that create the ...
In this paper, the use of nonlinear nearest trajectory based on phase space reconstruction along with several data-driven methods, including two types of perceptron artificial neural networks with Levenberg–Marquardt (ANN-LM) and particle swarm optimization learning algorithms (ANN-PSO), adaptive neuro-fuzzy inference system (ANFIS) and gene expression programming for forecasting suspended ...
Channel morphology in an alluvial river usually varies due to the altered flow and sediment regime from upstream damming. This paper reports an evaluation of the dynamical changes of sedimentation and erosion in the middle and lower reaches of the Yangtze River after operation of the Three Gorges Dam (TGD). ...
Results showed that the drainage ditch that was the most contaminated with P had the highest sediment zero-equilibrium phosphorus concentration (EPC0). Because sediment EPC0 of the three ditches was higher than water P concentration, they acted as a sink of P across the sediment interface. ...
The numerical modelling of circulations in shallow lakes is a relevant tool for all environmental applications in which flow advection processes are of interest, e.g. for studies on nutrients, microorganisms, pollutants and sediment dynamics. While three-dimensional (3D) models are needed to properly describe the flow fields of basins with the main ...
To understand how we can put hydrology, soil quality and sediment dynamics back in place. In our project we will do exactly this: find out how we can restore the mangroves through ‘ecological rehabilitation’, an approach that focuses on restoring enabling conditions to natural mangrove recovery. ...
Eroded sewer sediments are a significant source of organic matter discharge by combined sewer overflows. Many authors have studied the erosion and sedimentation processes at the scale of a section of sewer pipe and over short time periods. The objective of this study was to assess these processes at the scale of an entire sewer network and over 1 month, to understand whether phenomena ...
Preliminary analysis of long-term hydrological data shows that sediment dynamics of Russian Arctic rivers is largely affected by hysteresis effects in relation of water discharge to suspended sediment concentration (SSC). The role of large-scale geomorphic and geocryological conditions in sediment transport is still relatively ...
During the warm season, macroalgae underwent degradation processes and this caused the presence of high abundance of opportunistic species and species connected to perturbed sediment. The composition and the dynamic of macrobenthos of phytotreatment system can be useful to understand what happen, on a big scale, in some areas of Orbetello lagoon. Keywords: ...
Measured 226Ra radioactivity levels in the retrieved oligochaetes did not relate directly to water and sediment exposure levels. Other environmental factors that may influence 226Ra bioavailability in sediment and water were investigated. The strongest mitigating influence on 226Ra bioaccumulation factors was sediment barium concentration, with ...
Full information about CWF you can find on www.fuelcleaning.globecore.com Characteristics of coal-water fuel are follows: - rheological (viscosity, bias potential); - sedimentation (static and dynamic conditions homogeneity saving); - combustible (energy potential, combustion efficiency) Properties of coal-water fuel: - flammability point – ...
Modelling fine sediment dynamics, including transport, deposition and re-suspension, is very complex. ...
Fluid Dynamics offers a full cooling tower protection service including scale inhibitor, biocide, particulate filtration and on site tower cleaning. ...
The removal of the mangroves and confinement of the intertidal range due to construction of earth bunds around the shrimp ponds caused changes in sediment dynamics. This triggered massive erosion and the related land loss, inundation and salt water intrusion problems. ...
Sediments in combined sewers may negatively affect the performance of sewer systems and significantly promote the formation of hydrogen sulfide. To prevent this, German sewer systems are cleaned regularly but at high costs. In order to optimize the cleaning intervals, this study investigates how deposits build up and change over a defined period under constant conditions. The experiments were ...