Azizdzhan fazilovich babadjanov

hydrogeological conditions. According to the conditions of formation and consumption, the groundwater of the surveyed area, discovered in the Quaternary and Upper Neogene deposits, is divided into groundwater and interstratal. Groundwater is confined to alluvial, alluvial -proluvial, proluvial-alluvial, proluvial deposits of Quaternary age, in the southern part of the territory - to sandstones and sandy siltstones of Upper Neogene age. Water-bearing rocks are gravel, uneven-grained sands, sandy loams, loams. Relative regional aquiclude are dense clays and siltstones of Upper Neogene age.
The depth of groundwater varies from 1 to 100 meters or more , and in most of the surveyed area is 10-80m. The smallest depth of groundwater occurrence is noted within the Charagyl depression and in the floodplain part of the Kashkadarya river, as well as on irrigated massifs of the proluvial-flat plain. Groundwater is fed mainly due to underground inflow from the gravel-pebble part of the alluvial fan of the Guzardarya River, and within the territory - due to infiltration of surface waters of the river. Kashkadarya and large channels: Faizabad, Kamashi, Denau, Beshkent, etc.
In places with a close occurrence of groundwater, atmospheric precipitation participates in the supply of groundwater, and in irrigated areas - infiltration losses of irrigation water. Groundwater is mainly used for underground outflow towards the modern valley of the Amudarya River, where there is a regional discharge of groundwater in most of the territory. Groundwater is also consumed for evaporation and transpiration within the Charagyl depression and in areas with a close occurrence of groundwater. The degree of mineralization of groundwater is very varied. Their dense residue varies from 0.5 to 3.0 g/l, and within the solonchak depression. Fresh and low-mineralized waters with a dense residue from 0.5-1.0 to 1.0-3.0 g/l are distributed in a strip along the modern riverbed. Kashkadarya up to 3 km wide, as well as along large canals - Denau, Faizli, Faizabad reaches 5.78 g / l.
By the nature of mineralization, groundwater is predominantly sulphate, sulphate-chloride and chloride. Interstratal (pressure) waters discovered by exploratory wells at depths of 50-330 meters are confined to the interbedded strata of sandstones, siltstones and clays of the Upper Neogene age. Paleogene clays serve as a regional aquiclude. The degree of mineralization of interstratal waters is varied. The content of the dense residue varies from 1-3 to 10-15 g/l, while the character of mineralization also changes from sodium sulfate to sodium chloride.
The basis for constructing the model and as the initial parameters were the results of complex engineering and geological studies carried out to justify the project for the irrigation development of the territory of the central, southeastern and southwestern parts of the Karshi steppe (16, 17, 19), which included the following types works:
Experimental engineering-geological and hydrogeological works are as follows: determination of the filtration properties of the rocks of the aeration zone by the method of pouring into pits; determination of the filtration properties of rocks by the method of cluster pumping from wells; methodology and results of determining the engineering-geological characteristics of soils and engineering-geological survey, scale 1:50000