When dams are built, sedimentation accumulation starts in high-fuzzy; after filling of dead volume happens, blurring of useful volume, and the efficiency of the reservoir decreases. In this research, the Chartak reservoir in the Namangan region. In this study, the ArcGIS application was used with the ArcMap program. Originally Sentinel 2 Satellite images were downloaded free of charge from Glo Vis US official website. The unstable reservoirs were selected for the length of the reservoir. For each reservoir, the dependence of the water level on the flow rate was calculated, thus analyzing the sediment movement. The research results showed that 10 control points were taken, where Q was the same. In the first control point, in which all value was a bit lower than others, Q was 5, followed by 310 in B, 3.4 in H, omega had 1081.3, and 4.6 in ϑ.
To develop a work plan for reliable and efficient use of water reservoirs, an accurate information about the volume of water stored in the reservoir for the safe operation of the reservoir facilities is necessary. The useful water storage capacity of reservoirs has been steadily declining over the years due to the sedimentation coming with the stream. The article presents a method for determining the continuous change of the reservoir volume during operation due to sedimentation. A calculation method estimating the dynamics of the sediment distribution in the reservoir has been scientifically developed. The proposed calculation method was tested and compared in the field conditions. The analysis of the data collected in the Chimkurgan, Tashkent and South Surkhan water reservoirs under field conditions based on mathematical statistical methods showed a relationship between the relative turbidity and the reservoir depth. A new method of determining the decrease in useful water volume due to sedimentation in reservoirs has been proposed.
Hydro transport is characterized by the combined movement of liquid and solid particles, which in a mixture form two-phase or multiphase flows with different physical and mechanical properties. One of the main tasks of hydraulic transport is to study the throughput of pipelines, where taking into account the distribution of sediment concentration over the cross section of the pipeline formed under the influence of gravitational force is of great importance in describing the nature of the two-phase flow. Pressure-bearing suspended flows in hydro transport systems are usually characterized by high volumetric concentrations and a wide range of sizes and densities of solid particles that are part of hydraulic mixtures. The flows under consideration are more complex in their structure than turbulent flows of homogeneous liquids in pipes. Therefore, the methods for calculating these flows are much more complicated than the usual methods of hydraulics of pressure flows of homogeneous liquids. To develop scientif-ically based methods for calculating the parameters of the movement of hydraulic mixtures in pipes, widely used the averaged equations of the weighted flow and experimental data. When moving slurries through pipes, gravity plays a significant role. The article discusses the influence of gravity on the throughput of pressure systems with different slopes and obtains new dependences of the flow rate of turbid flow on the slope of the pressure pipe.
In the present era, when climate change has become a global problem, efficient use of water resources is becoming an important task. Natural field research was conducted in Chartak reservoir. In order to determine the amount of turbidity entering with the flow, the characteristic tributaries were determined along the length of the reservoir, and in each tributary, samples were taken using a bathometer at different times of the season and filtered in laboratory conditions. According to the analysis of the results, the average amount of incoming turbidity was 0.3-0.5 g/l, and the amount of outgoing turbidity was 0.05-0.08 g/l. Samples of the sediments that sank into the reservoir bowl were taken and their fractional and chemical composition was analyzed in the laboratory of “Gidroproekt” JSC. According to the fractional composition of muddy sediments, particles with a diameter of 1.0-0.5 mm are 13.98%, particles with a diameter of 0.5-0.25 mm are 11, 49%, particles with a diameter of 0.25-0.10 mm - 7.56%, particles with a diameter of 0.10-0.05mm - 10.48%, particles with a diameter of 0.05-0.01 mm - 26.8%, it was found that particles with a diameter of 0.01-0.005 mm make up 13.34%, and particles with a diameter of 0.005-0.002 mm make up 16.42%. If we pay attention to the distribution and share of sediments on the walls, 35-40% of particles with a large fraction (d=1.0-0.1 mm) and 50-60% are particles with a small fraction (d=0.05-0.001mm). It is based on the presence of particles rich in microelements useful for agricultural fields in sediments. If we pay attention to the distribution and share of sediments on the walls, 35-40% of particles with a large fraction (d=1.0-0.1 mm) and 50-60% are particles with a small fraction (d=0.05-0.001mm). It is based on the presence of particles rich in microelements useful for agricultural fields in sediments. If we pay attention to the distribution and share of sediments on the walls, 35-40% of particles with a large fraction (d=1.0-0.1 mm) and 50-60% are particles with a small fraction (d=0.05-0.001mm). It is based on the presence of particles rich in microelements useful for agricultural fields in sediments.
The water reservoirs’ sedimentation significantly impacts on its capacity and water supply efficiency, so estimation of sediment volume is an important action at management. Many methods are used for this purpose, including mathematical models, hydrologic and hydrometric methods, etc. However, each reservoir is a unique strategic object and when selecting a calculation method all specific characteristics should be taken into account. In the present research, a mathematical model and developed soft were used to estimate the water and sediment flows in the Channel reservoir of the Tuyamuyun Hydro Complex, located in the lower sides of the Amudarya River, Uzbekistan. The estimation is based on the evaluation of both suspended and bed-load sediments dynamics taking into account variation of the water level in the reservoir as affecting factor, i.e. its operation mode. The average multi-year sediment rating curve and empirical equations were corrected based on effective factors, such as time and conditions of measurement, which increased the model efficiency.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.