The objective of this article is to find the optimal trajectory of a pumping ship, used to clean oil spots in the open sea, in order to pump the maximum quantity of pollutant on a fixed time period. We use a model previously developed to simulate the evolution of the oil spots concentration due to the coupling of diffusion, transport from the wind, sea currents and pumping process and reaction ...

*Correspondence: Christos H. Halios, Department of Meteorology, University of Reading, Early Gate, PO Box 243, Reading RG6 6BB, UK e-mail: [email protected] Geometric shapes of coherent structures such as ramp or cliff like signals, step changes and waves, are commonly observed in meteorological temporal series and dominate the turbulent energy and mass exchange between the atmospheric sur...

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in river meandering, when flow passes through a bend, reduction of flow velocity and rising hydrostatic pressure cause super elevation phenomena at outer side and reduction of water surface at inner-side of the bend. a helical motion results, causing erosion of the outer side of the bend. installation of submerged vanes on the stream bed can reduce erosion of the outer bank significantly. in th...

The sediment composition of the seabed governs its mobility, hence determining transport and morphological evolution estuaries tidal basins. Bed sediments often consist mixtures sand mud, with spatial gradients in sand/mud content. This study aims at increasing understanding processes driving basins, focusing on depositional processes. We show that bed Wadden Sea tend to be either mud-dominated...

This paper is concerned with the problem of recognition of objects laying on the sea-bed and presented on sonar images. Considering that high resolution sonar system provides acoustic images of high-quality, several researches have been interested in Synthetic Aperture Sonar (SAS) and Sides can sonar images for underwater objects. This work presents recent detection algorithms targeting their m...