Examples of conceptual model use

The Caspian Sea receives most pollutants from river discharge, mainly due to the Volga River. Recently, the annual quantity of oil hydrocarbons entered into the Caspian Sea with river discharge reaching 55,990 tons, synthetic surfactants, 12,695 tons, and organochlorinated pesticides, 66 tons (Shaporenko, 1997). 

Let s consider examples of a conceptual model using recent POCs monitoring data for water and bottom sediments of water bodies (rivers and flowing water-storage reservoirs) in the basins of the Volga, Ural, Terek and Kura rivers. 

Our studies (Galiulin and Bashkin, 1996) accomplished in Klyazma and Ivan kovsk water reservoirs suggested loss or leaching of HCH and lindane in relatively little transformed form fromLPA because the oc- andy-isomers content was similar (Table I). The proportion of DDT in bottom sediments of the Klyazma river, tributaries of the Moskva and Oka rivers (Moscow region) was as (DDE + DDD)/DDT 1, suggesting relatively little insecticide transformation in silts of bottom sediments. 

Ivan kovsk, Istra, Ruza and Klyazma reservoirs 0.002-0.004 0.003-0.006 0.002 Khadjibaeva et al., 1996 

Ivan kovsk and Klyazma reservoirs 0.08-0.176 0.059-0.066 0.075-0.077 Galiulin a. Bashkin, 1996 

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