A model is developed for simulating changes in river bed morphology as a result of bed scouring during the release of an ice jam. The model couples a non-hydrostatic hydrodynamic model with the processes of erosion and deposition through a grid expansion technique. The actual movement of bed load is implemented by reconstructing the river bed in piecewise linear elements in order to bypass the ...

Seawalls are vital for protecting coastal areas. However, the seabed in front of seawalls may undergo severe scouring. This can result destabilization seawall structure, underlying mechanisms which remains unclear. Therefore, an integrated observation system consisting acoustic and optical instruments was deployed areas with used to observe sediment dynamics elements such as waves, currents, ti...

Obstacle marks are instream bedforms, typically composed of an upstream frontal scour hole and a downstream sediment accumulation in the vicinity obstacle. Local scouring at infrastructure (e.g. bridge piers) is well-studied phenomenon hydraulic engineering, while less attention given to time-dependent evolution holes boulders their geometric relations (depth width, length ratio). Furthermore, ...

To determine immunologic reactivity to Bacillus anthrax antigens, we conducted serologic testing of workers in a factory that performed scouring of wool and goat hair. Of 66 workers, approximately 10% had circulating antibodies or T lymphocytes that reacted with anthrax protective antigen. Individual immunity varied from undetectable to high.

The Evidential Reasoning for Multi Criteria Decision Analysis (ER-MCDA) is based on a mapping process transforming a possibility distribution into a Bayesian basic belief assignment (BBA) related to a qualitative frame of discernement (FoD). Each element of the FoD is a fuzzy set. A new improved mapping method is proposed to get a final potentially non-Bayesian BBA on the FoD. We apply it to as...

We present a new set of experiments in local scour due to confined twin propeller jets aiming include driving characteristics the analysis scouring action during in-port manoeuvres. The maximum depth is studied as function bed clearance, wall clearance and efflux velocity jet. Aiming reproduce more realistic manoeuvres, both forward backward rotation propellers are analysed showing different be...