Modern trends in road construction (an increase in traffic intensity and carrying capacity of road transport, expansion of the network of roads, including local ones) put forward the problem of the need not only to increase the durability of road structures but also to use local materials and soils in road construction. Considering that many regions of Uzbekistan experience a shortage of materials for the construction of foundations, and their delivery is associated with additional transport costs, the relevance of using local soils in the bases of road pavements becomes obvious. Recently, there has been an increased interest in methods of physical and mechanical stabilization of soils using stabilizers. Dependence is proposed that allows one to determine the strength and deformation characteristics of stabilized saline soils.

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In solving the engineering problems in the practice of different specialties, in the design of roads and roads, structures, determining the physiographic conditions of the same regional areas: basin area (F), height (Z), average square difference of basin height (s), slope (J), parameters such as the length of the main channel in the basin (L), the width of the maximum water flow in the basin (V) and its depth (h), that is the determination of the calculated values of morphological indicators, performed using a large-scale map. It allows to estimate the amount of physical-geographical and morphological indicators, analyze their interrelationships, reveal the regions' physical-geographical laws, use them in hydrological calculations in the basin, and determine their values, to apply them in solving engineering problems.

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