The concept of creating a new water management system in the region

Rakhmatov, N.; Maksudova, Lyudmila; Jamolov, F.; Ashirov, B; Tajieva, D

doi:10.1088/1757-899x/883/1/012007

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…20-25% flows at a depth of 0.5-2.5 m above the water level, 5-15% at a depth of 3-4.5 m above the water level and accumulates in front of the fences. Analysis of the data obtained as a result of observations allows one to correctly select the parameters of the device to clean and remove debris accumulated in front of the grilles [15,16].…”

Section: Resultsmentioning

confidence: 99%

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

Shomurodov

Qurbonov²,

Ergashev³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The work discusses the state of use of the Amu-Bukhara canal. It also considers the number and size of suspended watercourses that affect existing hydraulic structures. The large amount of suspended runoff creates problems such as turbidity of the canal during operation, overflow of front runoff. Solving the problem through modern technologies and innovative proposals is a requirement of today. The application of the proposed collection mechanism can reduce labor costs for waste disposal by 30–35% and operating costs by 45%. In addition, proposals and recommendations were given to improve the existing suspension treatment facilities.

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Section: Resultsmentioning

confidence: 99%

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

Shomurodov

Qurbonov²,

Ergashev³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…This is achieved by changing the tortuosity of the canal (slope), the shape of the cross-section and the content of suspended sediments in the bottom sediments. The problem of studying and developing the theory of riverbed processes, coastal and deep deformations of the riverbed under the influence of water intake structures, quantitative and qualitative changes in riverbed flows has always attracted the attention of scientists around the world [10][11][12][13]. As a result of theoretical, experimental and field studies, the most important regularities of the flow, hydraulic resistance and development of the canal process for the natural state of the river, the influence on their intensity and direction are established.…”

Section: Introductionmentioning

confidence: 99%

Coastal and deep deformations of the riverbed in the area of a damless water intake

et al. 2021

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The paper analyzes the dynamics of planned and deep deformations on the section of the Amudarya River in the area of the damless water intake in the main structure of the Karshi Main Canal-KMC. The results of field studies of the state of the canal situation of the Amudarya River at the site of a damless water intake are studied. The course of riverbed processes in the riverbed is studied. Recommendations for improving water intake conditions have been developed. According to the results of the field survey and the study of the head section of the supply canal, the state of the Amudarya riverbed in the water intake zone was assessed. The results of surveys of the hydraulic and pumping modes of sediments of the Amudarya River in the area of the damless water intake are analyzed and summarized. The results of field studies of the canal situation of the Amudarya River in the water intake area in the Amudarya River KMC in the area of the Karshi head water intake are studied. The riverbed situation is not characterized by constant hydraulic characteristics over time for the same water flow rate, i.e. with the same water horizon marks, the flow rates may differ from each other by about half, and with the same flow rates, the horizon marks may vary up to ± 0.6 m. This is explained by the extreme instability and high mobility of the canal, and large deformations of the canal occur in a short time. The hydraulic regime of the river is characterized by a significant redistribution of speeds, depth and width of the flow. The range of their changes is within: Maximum speed >Vmax =2…5 m/s; average speed Vav = 0.5…2.5 m/s; depth H max = 4…14 m, Hav = 1…5 m; width B = 300…2000 m; slope i = 0.00016…0.0003. It is established that the characteristic feature of the river is that at a constant flow can have different average velocities depth and width, for example, when Qw = 1000 m3/s, respectively, v = 0.6…1.7m/s, B = 180…1030m, Hav = 1.1…4.3m.

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“…To carry out this work, it is necessary to study a two-dimensional flow in open channels. The most convenient, cheap and multivariate is the method of numerical research [1,2,4,[8][9][10][11]. A detailed comparison of the results of numerical and laboratory modeling of the flow in open channels with a sharp increase in the channel width characteristic of the movement of a water flow behind blind dams was carried out in [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…When the gate was opened, a breakthrough wave occurred; during the period of its propagation in the region, measurements of the hydrodynamic parameters of the flow were carried out. The authors of this paper [11] investigated the effect of the length step on the results of numerical experiments. Based on the results of numerical studies, graphs of the time change in the longitudinal component of the velocity following a sudden twofold expansion of the channel are presented.…”

Section: Introductionmentioning

confidence: 99%

Regulation of the flow in the area of the damless water intake

et al. 2021

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The article discusses the results of numerical studies of the flow of the Amudarya river above the point of the damless water intake to the head structure of the damless water intake to the Karshi Main Canal-KMC. The system of two-dimensional equations of hydrodynamics-Saint-Venant is used as the basis of the mathematical model. In this work, a series of calculations of the field of currents in the river channel during low-water periods is carried out. Below are the main research results and proposals for ensuring the stable operation of the damless water intake in low-water conditions. The applicability of a numerical model composed of the equations of shallow water -the vector equation for the conservation of momentum and the scalar equation for the conservation of mass, has been proved, when describing a flow with the presence of circulation zones, which is typical when the water flow is constrained by blind dams. In this case, the solution pulsates around a certain average value, and the average length of the circulation zone behind the sudden expansion of the open flow is in good agreement with laboratory experiments. Numerical studies have shown that the device of a jet-guiding dam 150 m above the water intake gate in the CMC is more effective than when the dam is located 250 m above. In essence, dam № 2 with a length of 65 m does not affect the conditions at the water intake in the KMC at all, and dam № 2 with a length of 120 m is almost equivalent in its impact on the flow to dam №1 with a length of 50 m. Analysis of the results shows that the placement of an additional threshold in the Amudarya river bed improves the situation by raising the water level at the water intake. The threshold is flooded even at low water levels, which reduces the speed load on its body. At the same time, the threshold is located directly at the beginning of the channel, in part to protect the intake from incoming sediment, and high enough speed water glistening over the threshold in line, ensure the transit of sediment that can reduce enters the intake. Such measures will reduce the turbidity of water entering the channel. This, in turn, reduces the intensity of the silting process.

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The concept of creating a new water management system in the region

Cited by 8 publications

References 4 publications

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

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

Coastal and deep deformations of the riverbed in the area of a damless water intake

Regulation of the flow in the area of the damless water intake

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