Timchenko O. The hydrological factors of oxygen regime formation of Kaniv reservoir

Dissertation for a degree of Candidate of Geographic Sciences by specialization 11.00.07 - land hydrology, water resources, hydrochemistry. - Taras Schevchenko Kiev University, Kiev, 2006. This work is dedicated to searching of key hydrological factors which can improve of oxygen regime in Kaniv reservoir. The oxygen regime is viewed as integral index of water quality and ecosystem conditions. The Kaniv reservoir is good flowing water body and has better oxygen regime than other reservoirs in Dnieper cascade. But some time in summer and winter period the extreme situations which connecting with reduced concentration of oxygen in water can be formed in there. For the avoidance of this the methodical base for improve of oxygen by HEPS flash are elaborated. Extension of flash and maintenance of its irregular regime for summer period and extension of ice hole size for winter period are suggested for river (upper) part of reservoir. Activation of internal exchanging by asynchronous work of Kiev and Kaniv HEPS are suggested for lake (lower) part of reservoir. The methodical elaboration of improving oxygen in Kaniv reservoir open the way to system problem-solving with management of oxygen regime in cascade reservoir where are potentialities of artificial regulations of water regime by HEPS. The key words: Kaniv reservoir, oxygen regime, methods of improving.