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THE INFLUENCE OF THE WATER EXCHANGE INTENSITY ON THE CONTAMINATION PROCESSES IN THE ENVIRONMENT OF ARAL SEA REGION
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org
Citation: Paper number 701P0904, . (doi: 10.13031/2013.17420)
Authors: D. V. Z.
Keywords: problem, pollution processes, hydrochemical conditions, toxic components, water exchang, possibility of spreading toxic microelements
Nowadays many scientists and researchers emphasize solutions for the ecological problems of Aral Sea Region. In this paper attention has been paid to underground water and soil contamination processes. A study of such processes on the irrigated territory is important for decision-making and development of the efficient actions over improvement of the ecological situation in Aral Sea Region.The main sources of technogenic influences in this particular situation are agriculture, industrial enterprises, acid rains, and dusty storms. These influences are coming from the dried areas of Aral Sea bottom and from the polluted water of Amudariya River.
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In this research an attention is paid to the forming factors of hydrochemical conditions and barriers that promote accumulating processes of the toxic microelements. Using the results of chemical analysis three danger classes of microelements are specified. The concentrations of them in the underground water greatly exceed the norms. The row of toxic components polluting underground water and soils was defined, and the questions of the spatial sharing of polluting metals have been considered. During the investigation process the influence, diluting the abilities of the surface water on spreading of contamination and changes in their concentration have been noticed that is also stipulated by the particularity of the water exchange. One specifies a feature of hydrogeological terms on the considered area is a shaping natural-technogenic type of water exchange. In this condition, the specific particularities of the contamination and self-clear processes of geological ambience also come into the light. The specified type of water exchange is conditioned by complex influences. There are natural and technogenic factors.
The total part of the research was an estimation of underground water quality and hazard of heavy metals spreading into adjoining areas with the provision of the natural and man-made type of water exchange.