The aim of the research work is fairly eliciting the improvement processes, results of applied irrigation changes performed in 1951-1990 in the irrigation system of Uzbekistan and their consequences applied primary and historical sources.
The scientific novelty of the research work includes followings:
Double-sided policy of the Soviet government in Uzbekistan touching upon irrigational system in the second half of the XX century and its impact on irrigational field deformation processes have been fairly elucidated;
In the republic that had developed the culture of irrigated field formed a unique school, it was adopted as supportive goal on upbringing personnel even during the reign of Soviet power, similarly, local engineer-hydrotechnic personnel’s attendance on building barrages (small water reservoirs) has been subsumed into scientific consumption applying «Oral history» approach;
The reclamation of new lands rose quarrels in the fields of irrigation and social life, in particular, in order to reclamation of virgin and dry lands in wasteland of Central Ferghana, Mirzachul, Surkhan-Sherabad, Karshi and Jizzakh, families were made to move from densely populated parts of the republic, and their influence on urbanization and transformation of districts has been substantiated;
It has been ascertained that from the beginning of the 70-80s of the XX century irrigated field had been enlarged extensively without paying attention to the quality of fertilation which later caused widening irrigation and melioration affairs, the change of configuration in irrigation system, turning of irrigated field to the wasteland, and decrease of productivity;
The construction of pumping stations, drainage and canal on the purpose of decreasing the surface of subsoil water in irrigated field, lately cased to destruction of natural balance of water, shortage of water, derailing of ecologic condition, and external effect to the area near the Aral Sea gene pool have been confirmed basing on historical evidences.
