The transport of fine-grained particles in estuarine and coastal waters is influenced by flocculation processes (aggregation and floc breakup). As a consequence, the particle size varies with time in the water column, and can be orders of magnitude larger than those of primary particles. In this study the variations in floc size is simulated using a size-resolved method, which approximates the ...

of spherical particles are ‘‘cast’’ vertically over a planar horizontal sions, X and Z, and then we generated the deposition over surface. Upon first contact (with the surface or with a previously a segment of length 10 particle-diameter units. Unlike this deposited particle) each particle stops. This model helps material example, interesting simulations are in 3D. In order to scientists to stu...

in order to assess the potential of copper mineralization and its associated elements in soltan meydan basaltic formation situated in the north of shahrud, the method of stream sediment and heavy mineral has been used. to achieve this aim, totally 68 samples of sediments (-80 mesh in particle size) and 6 samples of heavy minerals (-20 mesh in particle size) have been collected in an optimized n...

The specific goal of this research is to develop a model of acoustic scattering due to volume heterogeneity consistent with existing propagation models in elastic layered sea beds and therefore to provide a self-consistent theoretical basis for improving and upgrading current bottom interaction codes (such as GABIM). At this first stage of research, the model should be capable of explaining bac...

There is growing concern about the biologic effects stemming from steroids in impacted waterways. In aquatic systems, interaction between steroids and sediment influence both contaminant fate as well as subsequent bioavailability to aquatic organisms. The focus of this dissertation research was to gain a better understanding of steroid behavior in aquatic systems based on the physiochemical pro...

Abstract The goal of this paper is to set up a framework designed to take into account the characteristics of sediment particles when transported by water. Our protocol consists in describing the characteristics of sediment particles via an additional variable, and to build operators involving this new variable, modeling the evolution of the particle characteristics. Several such operators are ...