Channel bed processes experimental modeling in the area of damless water intake

Abstract

The article presents the main results of substantiating the materials used when conducting experimental studies of channel processes in a river, the channel of which is composed of easily eroded soils. It is substantiated that the Amudarya sand cannot be modeled on a geometric scale since the model deposits are too small (powder) and lose the property of loose bodies. In such cases, a material with a decrease in specific gravity without a decrease in diameter is used as a substitute for sand. Since the sediment diameter cannot be reduced, the actual scale of the model remains distorted. It is indicated that the sediment diameter cannot be reduced, then in fact, the scale of the model remains distorted. Therefore, when the bottom of a river bank is made of sand that does not lend itself to geometric modeling, regardless of the change in the specific gravity of the natural material, to ensure the mobility of the sand on the model, it is necessary to distort the vertical scale. Distortion of scales is also necessary because when using in laboratory conditions the same sand that formed the bed of the river, at any depth with a low velocity, the model observes bottom resistances to the flow of the flow compared with nature. The vertical and plan scales of modeling were calculated, respectively, equal to 50 and 57. According to the results of the calculations, the value of the coefficient of mobility of bottom sediments was established, which was equal to 1.

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]. Additional leaks from the front of the device to overcome this shortcoming the collecting mechanism must be installed (Figure 4).…”

Principles and accounts of automated level with controlled weight controlling water level with new equipment

“…The №1 discharge hydroelectric power plant of the ABK-1 line, located at PK 310 + 43, was built and commissioned in 1965. The purpose of the facility is to discharge excess water from the ABK canal to the Amu-Bukhara 1 pumping station [5].…”

Research of deformation processes of Amu-Bukhara canal and increase of water permeability

“…Such situations cause various difficulties in obtaining water from the Amudarya to the ABMC. In order to study these negative conditions, a study was conducted and statistical analysis of data from the areas of water intake from the Amudarya to the Amu-Bukhara canal, picket 110 + 00 and picket 28 + 00 [1][2][3].…”