Azizdzhan fazilovich babadjanov

hydrogeological conditions. The Kashkadarya hydrogeological region is confined to the Kashkadarya river basin and belongs to the Bukhara-Karshi artesian basin. In the east, the borders of the region pass along the watershed line of the spurs of the Zarafshan and Gissar ranges. In the north, the Ulus-Jam watershed and the Zirabulak-Ziaetda mountains separate the Kashkadarya hydrogeological region from the Zarafshan region. In the south and west, the region has no clearly defined boundaries [23; 472-p.].
The structure of the Kashkadarya hydrogeological region involves aquifers and complexes confined to deposits of the Quaternary, Neogene, Paleogene ages. The hydrogeological conditions of the area are determined by the features of the geological, geomorphological structure, climatic conditions and the history of geological development (Appendix 2 ). Two second-order groundwater basins are separated - Kitabo-Shakhrisabz and Karshi.
The Kitabo-Shakhrisabz basin is located within the basin of the same name. The foothills surrounding the basin are composed of an interbedded layer of sandy loam, loam, gravel, pebbles, and sands more than 100 m thick. The content of sand and pebble deposits in the thickness is 10–25%. Alluvial cones articulate with an alluvial-proluvial weakly dissected plain, cut through by the modern alluvial valley of the Kashkadarya River. The section shows covering loams and sandy loams underlain by sandy-pebble deposits. The content of sand and pebble deposits is 25–50% of the considered stratum.
The Karshi basin is a drainless structure of a semi-closed type, open towards the valley of the Amudarya River and the delta of the Zarafshan River. Water-bearing rocks within the proluvial plain are fine-grained sands, gravelstones, sandy loams. They are separated by separate interlayers of dense loams and clays 3–15 m thick, within the alluvial valley - sands, gravel with inclusions of small pebbles and sandy loam, which are interbedded with thin interlayers (0.20–0.50 m) of loams and clays 30–35 m thick. m. Groundwater is formed due to underground inflow and infiltration of irrigation and river waters.
Within the area, in accordance with geomorphological, geological, hydrogeological conditions, three deposits of groundwater have been identified: Kitabo-Shakhrisabz, Left-bank and Guzar. These groundwater deposits are used for household and drinking and irrigation of lands of rural settlements and farms of the Kashkadarya region.