| Summary: | In this article, the Chimkurgan reservoir built in the Kashkadarya basin, located in the Qamashi district of the Kashkadarya region, is selected. Considering the change in the water level of the Chimkurgan reservoir, the level of erosion of the shores in the zone of 14 m of water level change on the left bank of the reservoir was considered. Over time, the forces induced by water weaken the soil aggregates, negatively affecting the soil's stability. The density composition of the reservoir coastal soils was determined at the specified heights. The degree of erosion of the reservoir’s banks, depending on the soil type, was also considered. To the bottom of the reservoir, the degree of erosion of coastal soils was determined in the water level change zone at heights of 9 m, 11 m, 13 m, 15 m, 17 m, and 19 m, 22 m, 23 m. It was found that the types of soils obtained from the elevations in the specified place differ from each other. It was determined that the type of soil at these heights is clay, soft soil, and sand, and to a certain extent, the erosion of the banks differs depending on the type of soil.
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