Ilyin L. Limnosystems of Ukrainian Polissya: Regional Regularities and Peculiarities of Optimization.

The thesis presents the development of theoretic-methodological and methodics basis of constructive-geographical research of limnosystems (branch limnological, complex landscape-studying, constructive-geographical and integrational ecolimnological ones). The main objective regularities of limnogenesis and peculiarities of both natural processes and those activized anthropogeneously or technogeneously in the regional water bodies and their basins have been established with due consideration of zone and region specific features. Historical aspects of water bodies investigation are considered, current branch classifications of water bodies are analyzed as a scientific basis for their geoecological research and limnologic-geographical knowledge synthesis. Nature conditions and factors of limnosystems state formation and functioning as well as regularities of natural and artificial water bodies distribution have been discovered. Both space-temporal and limnologic-geographical analysis as well as typification of water bodies have been done. Water bodies are studied in the manuscript as the environment for deposition piling up and bottom sediments accumulation so geochemical limnosystems state indicators have been determined.