Currently, it is proposed to design horizontal drains for the city of Fergana to reduce the negative impact of the rise in the level of groundwater on the environment, agricultural crops, buildings, and structures, as well as on underground communications. Groundwater depth measurements were carried out in observation wells in the city area and the results were analysed. The depth of groundwater level drop within the horizontal drainage effect is physically and mathematically modelled. For this, long-term data from observation wells were analysed and the hydraulic parameters of horizontal drainage were selected considering the hydrogeology of the area. Taking into account the terrain and characteristics of the soil layers, the possibility of diverting the collected water outside the city through the "Margilan Say" waterwork passing through the city centre has been developed. The differential equation of groundwater movement is solved by numerical calculation and the results are analysed graphically. According to the analysis of the results of numerical calculation, it is proved that it is possible to control the groundwater level with horizontal drainage. The adequacy of the results was assessed by comparing data collected in natural field conditions.

The study was conducted as part of a project to develop an automation system for monitoring groundwater in the city of Urgench. The possibilities of modeling and forecasting modeling MODFLOW in groundwater were studied. According to the results, regularities of the level and behavior of groundwater in the city of Urgench were revealed. According to the survey, the direction of movement of groundwater in the city of Urgench shifts in a northwesterly direction to a slope of 0.0008. According to the geophilized model, its high-traffic zone is located at a depth of 10-15 m, from 4-5 m per second.

Annotation: The article discusses the thermal calculation of the cooling tower. In the calculation, the specific air flow rate, the number of sections and the structural size of the tower are determined, according to the calculated value, energy-efficient methods are determined. Keywords: cooling tower, fan, specific air enthalpy, diagram I-d, relative humidity, aerodynamic resistance, thermometer. Аннотация: В статья рассмотрено тепловая расчёт градирня. В расчёта определено удельная расход воздуха, число секция и конструктивный размер градирня, по вычисленных величина определяется энергоэффективный методы. Ключевые слова: градирня, вентилятор, удельная энтальпия воздуха, диаграмма I-d, относительная влажность, аэродинамическое сопротивление, термометр.

One of the most important and complex issues in the design of soil drainage channels is the issue of correct accounting of the filtration process. It is necessary to take into account hydraulic parameters and soil composition of existing channels in order to reduce filtration flow rate in ditches with uncoated soil. The article shows how to choose its theoretical basis for reducing the filtration flow rate correctly. Hydraulically convenient design is one of the current problems in the design of canals. This can be achieved by reducing the wet perimeter of the channel to reduce the filtration process in the channel. The article recommends that measures to reduce the filtration process be implemented during the construction or reconstruction of canals, without dismantling and rehabilitating existing canals. Field research was conducted on the North Fergana main canal. In order to study the filtration processes, measurement works were carried out on the PK 396+00, PK 497+01, PK 688+7, PK 692+6, PK 694+6, PK 697+00 pickets crossing the 2-section of the channel in the city of Namangan. In addition, the article developed recommendations on the methods and procedures for the application of bentonite clay from the Lagon betonet clay deposit of the Fergana region to the bottom of the channel in order to reduce the filtration process that occurs in the canal area. According to the results of the study, in the range from PK 411 + 00 to PK 426 + 74, filtration consumption was higher than other pickets.

This paper discusses the current effects of groundwater levels on buildings and engineering communications in Fergana and ways to overcome them. The paper considers methods of lowering the groundwater level in the territory of the city of Fergana, using closed horizontal drainage and given hydrological calculations.