he physico-chemical paramenters(Kow,eveporation pressure,water solubility,Koc and BCF)of monocarboxoldehyde and other 19 organic pollutants were estimated and fugacityapproach model of multimedia environment at stable equilibrium for pond and agriculturalfield ecosystems was made.The primary reaults show that the model prediction for concen-tration distribution of organic pollutants in multimedia environment at stable equilibrium condition is feasible.For hydrophobic organic chemicals,the concentration in s...