Mathematical modeling of marine environment pollution processes by petroleum hydrocarbons and their degradation in Caspian Sea ecosystem |
| |
Authors: | A V Leonov O V Chicherina L V Semenyak |
| |
Institution: | 1.Institute of Oceanology,Russian Academy of Sciences,Moscow,Russia;2.All-Russia Research Institute of Marine Fisheries and Oceanography,Moscow,Russia |
| |
Abstract: | The available observational data on the pollution of tributaries and areas of the Caspian Sea by petroleum hydrocarbons and
products are examined. The possible petroleum input from sources in the sea is assessed using up-to-date data of satellite
observations of sea surface pollution by oil films. The hydroecological CNPSi-model is applied to studying water pollution
processes by petroleum hydrocarbons in ten areas chosen in the Caspian Sea and the subsequent biodegradation of those pollutants.
The model calculations of the within-year dynamics of petroleum hydrocarbon concentrations use mean annual observational data
on within-year variations in water mediium characteristics (water temperature, light intensity, and transparency), as well
as the morphometric parameters of sea areas (the area, mean depth, and water volumes). The characteristics of water exchange
between the areas were evaluated using a hydrodynamic model. The model calculations were used to characterize the within-year
variations in petroleum hydrocarbon concentrations, the biomasses of petroleum-oxidizing bacteria, the characteristics of
their oxidation activity and bioproduction, and the internal fluxes of petroleum hydrocarbons (their input from various sources,
horizontal and vertical transport, and biotransformation) in different sea areas. Calculation results were used to compile
annual balances for the processes of input and consumption of petroleum hydrocarbons in the chosen and aggregated sea areas. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|