The article represents the results of research of petroleum pollution in Kerch marine commercial harbor area conducted in framework of complex monitoring of the marine ecosystem state in the harbor and Kerch bay.

Methane is the important element of the ecosystem of the Black Sea, which influences a global climate change. In the work the basic processes of the biogeochemical behavior of methane are evaluated.

The influence of the drain of the Chernaya River to the forming of the water-salt regime of waters is examined on the basis of data of the regime observations of the aqueous drain and content of chemical indices. The calculation of the extension of biogenic elements into the Sevastopol Bay is executed.

The procedure of assessment of water areas ecological state using pollution load index (PLI) was applied to elucidate the pollution status of the Sevastopol Bay. The index allows assessing the quality of environment on the ten-point scale from 1 to 10 i.e. from a severely contaminated water basin to nearly unpolluted one. The ecological status of the Sevastopol Bay was clarified, its partition and comparison with both a number of the European Bays and estuaries and the Australian estuary were accomplished using the PLI.

Verification of model of fluctuation processes, taking into account effects of the flooding and shallowing of coast
Fomin V.V., Marine Hydrophysical Institute