GIS MAPPING OF ECOLOGICAL TENSION (CASE-STUDY OF ANGARA RIVER-BASIN AND IRKUTSK RESERVOIR)
Purpose. When zoning there appear technological and substantive challenges which depend on natural and anthropogenic conditions of a region. The purpose of the article is to study GIS mapping of ecological tension area zoning. Material and methods. The article deals with the characteristics of GIS mapping depending on the ecological tension degree based on the basin and geomorphological approaches. A lot of attention is paid to the development of spatial queries on the basis of attributive and geographical criteria in the basin of a large river. Results. The authors conclude that economic activities and dangerous natural processes cause ecological tension. Conclusion. The system of ecological destabilization severity criteria based on ecological tension degrees has been developed for each category of ecologically destabilized areas of Angara river-basin.