tailieunhanh - The Aral Sea Encyclopedia - G

G Geller Samuil Yulievich (Yevelievich) (1906–1972) – Soviet geographer who was one of the pioneer researchers studying the Karakum Desert. He graduated from the Geographical Department of Leningrad University, Doctor of Geography (1947). | G Geller Samuil Yulievich Yevelievich 1906-1972 - Soviet geographer who was one of the pioneer researchers studying the Karakum Desert. He graduated from the Geographical Department of Leningrad University Doctor of Geography 1947 . In the 1920s he took part in the expeditions led by . Fersman and . Scherbakov. Their investigations focused mainly on desert geography and saline water desalinization. In 1930 the USSR Academy of Sciences USSR AS sent G. to investigate the western part of the Northern Karakums after which he worked in the Kara-Bogaz-Gol area then studied the Southern Mangyshlak Plateau the Karyn-Djaryk depression and Ustyurt. As a result G. developed his theories about the utilization of deep drainless depressions for hydropower generation and raw chemical materials production. In 1934 together with . Kunin he published a review of the projects on watering of the Turkmen Karakums. Here he drew attention to the utilization of Kelif Uzboy for transit of the Amudarya waters to the west. His hydrological studies of deserts resulted in the formulation of an engineering-geographical practical proposal on deriving fresh waters from saline water by their natural freezing. G. built a trial site on which saline water was frozen in a layer-by-layer mode over a winter. At freezing salts in the form of brine precipitate from ice that after subsequent thawing becomes fresh water. In his work Some Aspects of the Aral Sea Problems 1969 G. disagreed with those who advocated for the calculation of an optimal water level in the Aral. Relying upon economic estimates G. argued that the benefits from expansion of irrigated farming would outstrip by 100-fold losses due to degradation and the interruption of the fishery activities that were the key economic sector for this water body. Considering the effects of wind drift of salts from the drying Aral Sea the stock of which is evaluated at 10 bill tons G. comes to the conclusion that wind drift of salts precipitated