Hydraulic parameters in the area of the main dam intake structure of the river

Bazarov, Dilshod; Umarov, Sukhrob; Oymatov, Rustam; Uljaev, Farokhiddin; Rayimov, Khumoyun; Raimova, Ikboloy

doi:10.1051/e3sconf/202126403002

Cited by 23 publications

(10 citation statements)

References 17 publications

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“…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].…”

Section: Resultsmentioning

confidence: 99%

Increasing efficiency of flow energy damping with lateral water intake

et al. 2023

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The paper presents the results of full-scale and experimental studies for applying a new design for damping the energy of the flow with a lateral water intake. In the article, the method for increasing the efficiency of flow energy damping with lateral water intake and a new calculation method have been improved. The proposed version of the calculation according to the method, compiled with several assumptions, demonstrated the possibility of using such a well and damper design with high operational reliability and the results aimed at damping the energy of the water flow of the lateral water intake structures. Recommendations were developed on calculating a water well with a lateral flow outlet.

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“…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].…”

Section: Resultsmentioning

confidence: 99%

Increasing efficiency of flow energy damping with lateral water intake

et al. 2023

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“…When testing soil pumps [13][14][15][16], it was found that parts made of electrocorundum on an epoxy-phenol-formaldehyde binder, compared with parts made of wear-resistant cast iron, increased the service life of pumps by 3-8 times. But the use of wear-resistant polymeric materials for the manufacture and coating of pump parts has not been widely used in practice due to the following reasons [17,18]: 1) polymer compositions do not provide satisfactory wear resistance at high flow rates; 2) the rough surface of polymer coatings creates additional hydraulic resistance and degrades hydraulic efficiency; 3) the quality of polymer coatings is highly dependent on strict adherence to the application technology.…”

Section: Fig 2 the Dependence Of The Intensity Of Wear Of The Impelle...mentioning

confidence: 99%

Influence of hydroabrasive wear of impeller blades on head of centrifugal pump

Uralov

Mutalov²,

Shakirov

et al. 2023

E3S Web of Conf.

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The results of experiments on studying the nature of changes in the concentration and dispersion of solid suspended particles showed that the highest average monthly sediment concentration is 2.5...3.8 kg/m3, and sometimes in rainy weather, the maximum water turbidity reaches 7kg/m3. In the composition of solid mechanical impurities, a significant amount consists of particles with a grain size of 0.1-0.05mm. Observations have established that particles larger than 0.01 mm at a low flow velocity in the supply channel and the water intake chamber of the pumping station were easily deposited in them. Siltation volumes at various stations ranged from 20 to 60%. As a result, the hydraulic resistance increased, which led to a decrease in the pump head. The wear of parts of centrifugal pumps in natural conditions was also studied, and the dependences of wear on the characteristic dimensions and duration of their operation are given. The results of micrometering of the working parts of the pumps showed that the blades of the impellers along the length and width wear out unevenly both in size and shape. This is explained by the fact that when the hydroabrasive flow moves in the interblade space, the kinetic energy of solid particles and their local concentration increase due to an increase in the values of centrifugal and Coriolis forces along the radius of the impeller.

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“…The impact of water diverted for irrigation is particularly strong on the discharges of the Logar River, the upper Kabul River, and the Gorband River (a tributary of the Panjshir). Traditional forms of irrigation are used so firmly and for a long time on all lands practically suitable for irrigation in river valleys that they were obtained without considering irretrievable water losses [14][15][16][17][18][19][20][21][22].…”

Section: Land Cover Informationmentioning

confidence: 99%

The Kabul River Basin - the source of the Naglu and other reservoirs

et al. 2023

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The article is devoted to the assessment and study of the Kabul river basin fed by 7 existing (Jabal-Saraj, Karga, Mahipar, Naglu, Sarubi, and Darunta) and numerous planned (including Gulbahor, Baghdara, Sarubi II, Kunar I, Kunar II, Shatut) reservoirs. The article discusses the Kabul basin's annual precipitation, land cover, and runoff. In addition, it sheds light on soil erosion and the concentration of river and reservoir sedimentation in the Kabul River Basin. Recommendations are also given for solving the problem of soil erosion and the siltation of reservoirs. There is very little data on the Kabul River and its basin due to the lack of detailed hydrological data. Most of the hydrological and meteorological posts did not function or were destroyed during the crisis in the country for about two decades, which led to little or no information on the river's hydrology during this period. Because of this problem, many organizations working in basin water management and designing new hydraulic structures face difficulties in properly planning and designing new hydraulic structures and reservoirs. As a result, most researchers, planners, and designers use old data with a limited observation period, which is insufficient for adequate design and planning of hydraulic structures and other basin development projects. Due to four decades of unrest in the country, the watersheds of the Kabul Basin have been used without any rules or management, resulting in land degradation and watershed erosion. Three main problems, namely overgrazing in rangelands, rain-fed fields, and deforestation, have caused land degradation in the basin. In addition, the situation has been aggravated by the cutting of bushes for fuel in hilly and semi-hilly areas. The basin is overpopulated, and there are many industries in the major cities of the basin, which contributes to water pollution in the Kabul river. Despite water availability, due to a lack of proper planning, the major cities in the basin cannot use the basin's water for domestic needs. In cities like Kabul and Jalalabad, people mainly use groundwater, resulting in the continuous sinking of the groundwater level. For the proper management and development of the Kabul river basin, much work needs to be done, which may yield promising results for developing the country's economy and improving the environment in the Kabul basin region.

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Hydraulic parameters in the area of the main dam intake structure of the river

Cited by 23 publications

References 17 publications

Increasing efficiency of flow energy damping with lateral water intake

Increasing efficiency of flow energy damping with lateral water intake

Influence of hydroabrasive wear of impeller blades on head of centrifugal pump

The Kabul River Basin - the source of the Naglu and other reservoirs

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