Surgil ESIA Report - Volume III - EKN

OAJ “O’ZLITINEFTGAZ”
ПТЭО «Комплексное обустройство
месторождения Сургиль с извлечением ценных
компонентов»
Second geotechnical element (EGE-2) includes limestone, limestone-rakushnyak
heavily fractured, weathered, friable. Layer thickness 1.0 meters or more. Group of soil on
the development of 31b.
Third geotechnical element (EGE-3) interbedded sandstone carbonatized with
mudstones, marls. Marls and mudstones in the form of thin layers of platy. At the top layer
of soil cracks, the cracks plastered.
Groundwater at the study site to a depth of 10.0 m is not revealed.
Soils have a high degree of aggressiveness in relation to the concrete in sulfateresistant
cement, and a high degree of corrosivity for steel. The depth of seasonal freezing -
0,72 m. Seismicity area - 5 points.
Based on the analysis of the soil in the area of an object, we can conclude:
- Construction of the facility is on land not suitable for agriculture due to low fertility
and strong salinization of soils;
- Soil area under consideration, mainly to have structural damage, so the additional
physical effects of significant changes will not make;
- Chemical pollution accumulates, mostly in the upper layer of soil because of high
capacitive properties of the terms of rocks.
Radioactivity of soils ranges from 18 - 20 mR / h. In accordance with sanitary norms
of radiation safety of the Republic of Uzbekistan exposure dose of radiation to areas with
permanent presence of humans should not exceed 30 mR / h. Thus, the natural radioactivity
of soils does not exceed the MPC.
Current status of Aral Sea in a desert zone determines the nature of the vegetation of
the investigated region. In connection with modern natural processes in the operation area is
observed degradation of vegetation cover. One of the most difficult factors determining the
current state of Aral Sea ecological community is a process of desertification.
The predominant type of desertification - soil salinity, but along with it is marked and
the degradation of fragile vegetation. Manifestation of desertification are vast expanses of
marshes, the unevenness in the overgrowth, the predominance of annual species of plants, a
weak association of them, a small part of perennials, the incomplete development of
biogorizontov, increasing the degree of mineralization of groundwater and lowering them.
In the Aral Sea in Uzbekistan, according to published data found 244 species of flora.
Among the most common family of the following: buzgunovye, Asteraceae, cereals,
tamariksovye, sedges, Chenopodiaceae, cruciferous and leguminous plants.
Flora of water (the Aral Sea and Lake) is very poor and about 13 species of higher
plants. They are representatives of families Rogozov and sedge, they were in retreat of the
sea more resilient than other groups of plants.
Changes in environmental conditions led to impoverishment of species composition
(both qualitatively and quantitatively) flora. In the operation area of the most common are
Книга 2. Часть 2. Проект ЗВОС по строительству ГХК
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