Analysis of possible pollution scenarios of risk in Vado Ligure harbour,

The goal of the paper is to analyze the possible pollution scenarios of risk in Vado Ligure – Ligurian Sea using wave heights data obtained from a local buoy. The original data of buoy were provided by Savona’s Harbor Authorities for this research. The examined area present an extension of approximately 10 hectares, and the principal maritime structures are quays and piers. The realization of a new multipurpose platform with a surface over the sea of 250.000 m2 implies that this is an area of interest for environmental analysis taking into account the increasing of trade of dangerous goods. The area was defined in a detailed bathymetry with a grid of 5mx5m. The wave heights were available only for a short period not significant to support a statistical approach but to describe a possible ordinary conditions of sea waves. The analysis was curried out using the software of Danish Hydraulic Institute MIKE21 that allows to model starting from the boundary conditions over the examined area the hydro dynamic sea conditions and knowing the characteristic of polluted elements to evaluate the impact along the shore and in whole area. To simulate the diffusion of the polluted elements we have proposed different approach used in literature assuming different conditions of wind and current to evaluate the extension of the possible pollution and the value of its concentration. The different results obtained are then compared among them to define the worst condition of waves and winds in case of accident. The final goal is the production of maps of different risk scenarios