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The author represents the method of creating composite 3D-models employing technology of geographical information systems for environmental impact assessment of projected, constructed and operating energy facilities. The paper describes the techniques of applying bundled software ArcView with add-on modules ImageWarp and RASTRProfi for alignment of multiscale bit-mapped and direct-beam three-dimensional models with the object of evaluating ecological risks for diverse territories.The article evaluates the environmental impact of a thermal power plant near the city of Rasht (industrial area Saravan) and demonstrates analysis of the territorial distribution of the soil contamination with varied pollutants at different wind structures. The paper demonstrates the method of building composite 3D-models applied for assessment of presumable incidents with radioactivity discharge at the nuclear power plant in Halileh, 20 km from the city of Bushehr. By analyzing the wind diagram in the territory being explored and determining the predominant wind directions in different periods, it is possible by way of employing this method to distinguish the territories and the objects with most unfavorable prognosis. This enables rendering a prompt decision on the measures minimizing unfavorable impact on the population and environment.Altering the point of topographical survey while synchronizing the scales, the researcher can place the designed project within any territory and analyze the necessary parameters for each variant.The author considers the presented in such a manner technique worth productive implementing while analyzing environmental impact of both operating and projected industrial facilities (industrial and agricultural enterprises, thermal and nuclear electric-power plants etc.).