Bank destruction in the middle section of the Amudarya River

Abstract

The paper presents the results of a full-scale study of the banks destruction in the middle section of the Amudarya River. The article presents the main factors of coastal destruction during floods and low water periods. Recommendations for the protection of banks from erosion are also developed. As a result of studies of the intensive local re-formation process of an easily washed-out channel, the plan for hydraulic schemes for the occurrence of local erosion of the coast both with a steady and unsteady movement in an open flow was developed.

Increasing efficiency of flow energy damping with lateral water intake

“…When installing the model, the width of the tunnel tray was maintained using templates installed in pairs along its entire length [15][16][17][18][19][20][21][22].…”

“…The construction of an average low-pressure hydroelectric complex is complicated by the difficulties in placing energy-extinguishing devices due to the complexity of the mountainous terrain. Extinguishing the energy of the water flow in the case of lateral water intake and preventing the phenomenon of the channel process per hectare of hydraulic structures requires the introduction of effective energy absorbers in practice [5][6]. In this regard, using effective means and devices that reduce the excess kinetic energy of the water flow in medium and low-pressure waterworks is particularly important.…”

“…Currently, the problems of using various combined options for damping the energy of a water flow in side water intake structures, solving the issues of developing an experimental model, and applying them in practice to select the most advanced design have not been sufficiently studied. In this regard, there is a need to study and develop hydraulic processes in engineering practice using constructive solutions of various types of energy absorbers in the structure itself, taking into account the fact that in spillway structures, the energy of the water flow is extinguished at short distances, preventing the phenomenon of overturning the water flow [6][7][8][9].…”

Measures to reduce negative effects of waste using the Amu-Bukhara machine channel

“…After an in-depth analysis of the existing problems, a number of proposals and recommendations were developed to improve the treatment plant with a capacity of N = 6.5 kW in the model HQN4.8x5.5-75˚, developed on the basis of Chinese technology [18,21]. In particular, the cleaning device of the model HQN4.8x5.5-75˚ has a small length of the tooth part (15 cm) that collects the debris, so the range of coverage of the debris is small, and its efficiency is very low [19,20].…”

Justification of parameters of sump in machine channel

“…Karimov. As a result of these studies, methods were developed with the conditions for preventing the accumulation of sediments, erosion of the channel, the choice of structural elements, effectively settling sediments as part of a moving stream, and parameters of morphometric elements of the channel [8][9][10][11][12][13][14][15]. As a result of these studies, recommendations were developed for choosing the most hydraulically optimal sections of channel sections and ensuring their efficient operation under certain hydrological conditions.…”