Physical modeling of the filtration process through the dam base

Shaazizov, Farrukh; Shukurov, Diyor

doi:10.1088/1757-899x/869/7/072037

Cited by 17 publications

(10 citation statements)

References 16 publications

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“…2; Н 1 is maximum daily precipitation layer of 1% availability, determined according to the data of the nearest meteorological station;  is transition coefficient from layers of rainfall runoff of 1% availability to layers of runoff with a different probability (Table 3. ); F is catchment area, km 2 . For streams with a short observation series, it is possible to recommend the dependence of the distribution parameter λ on the average height of the river basin (Z): .…”

Section: Methodsmentioning

confidence: 99%

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Assessment of damage during the formation and passage of mudflows in the Tashkent region

Shaazizov

2021

E3S Web Conf.

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Mountainous and largely foothill areas of the Republic of Uzbekistan are mudflow hazardous. In the Tashkent region, there are two mudflow river basins (dangerous concerning the manifestation of mudflows): the Chirchik river basin and the Akhangaran river basin. Based on the results of long-term observations of the Uzhydromet service, a digital map of the mudflow hazard in the Tashkent region for a century was compiled. The method for determining the damage from the action of mudflows on a specific object consists of determining the equivalent mudflow pressure according to its initial parameters. According to the methodology for assessing damage in the event of a natural emergency, the main parameters of the damaging factors were determined during the passage of a mudflow in the event of intense rainfall. The calculations were performed for two scenarios: 1) with dangerous rainfall with an intensity of 30 mm per day; 2) in case of especially dangerous rainfall with an intensity of 60 mm per day. Based on the calculations performed, the amount of damage to the national economy of the Tashkent region was determined during the passage of a mudflow caused by intense rainfall.

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Section: Methodsmentioning

confidence: 99%

“…Based on a digital map made on the Arc View 3.2 and ArcGIS 10 platforms, the most dangerous areas of mudflow manifestations were identified, and settlements located in the area of high mudflow activity were identified [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Assessment of damage during the formation and passage of mudflows in the Tashkent region

Shaazizov

2021

E3S Web Conf.

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“…Substituting the values of the parameters included in equation (2) and making some transformations we have:…”

Section: Fig 1 Analytical Model Union Streammentioning

confidence: 99%

The flow Confluence of river systems of the Pskem and Koksu river basins

Shaazizov

2021

E3S Web Conf.

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In the Bostanlyk district of the Tashkent region, there are high-mountain breakthrough lakes located in the Pskem and Koksu rivers basin, which pose a particular danger to the downstream territories. The river system of the basins of the Pskem and Koksu rivers located in the Tashkent region is characterized by the presence of many nodes of a confluence of tributaries that form the hydrographic network of the basins of the high-mountain rivers under consideration. In the event of man-made and natural emergencies, a breakthrough wave can form on high-mountain outburst-hazardous lakes. The main purpose of these studies is to develop a method for the hydraulic calculation to determine the depths of flows in the confluence nodes. Based on the use of the law of conservation of momentum, a model and method for calculating the junction of open water streams have been developed. To determine the depth h2 in the main channel after the confluence point, we recommend using the well-known hydraulic methods for determining the depth of water in open channels. Determination of the depths h1 and h0 of the main flow and inflow, respectively, can be analytically obtained based on the obtained dependences (9) and (10).

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“…To determine the flow rate crossed by the drainage system, which consists of a system of parallel belt drains, we apply the MPSSS method used in calculating the balance of the sludge reservoir during its filling [19][20][21][22][23]. We assume that water enters the drain from a water-saturated layer of some thickness Z 1 with a filtration coefficient and a water loss coefficient μ f .…”

Section: Introductionmentioning

confidence: 99%

“…Considering this solution, from (21), we obtain the value of half of the flow rate per 1 running meter of the drains.…”

Section: Introductionmentioning

confidence: 99%

Methods for calculating the balance during the period of draw-off, drainage of sludge collector cells and construction of secondary embankment dams

2021

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An industrial waste-phosphogypsum-is formed in the production of phosphorus mineral fertilizers. As is well-known, the issues of processing and utilization of phosphogypsum on an industrial scale remain unsolved. Consequently, production waste generated at chemical plants is stored in various types of storage tanks. The currently used hydraulic storage method provides for the supply of waste in the form of a slurry into the hydraulic dump cells, their sequential dehydration in the dump, and the subsequent development of a part of the stored waste for the construction of secondary dams. However, due to the low water-release properties of phosphogypsum, it is impossible to ensure its dehydration to the required degree, in large volumes, and the required period. Therefore, various designs of watertight diaphragms and drainage devices are provided in the sludge collector to accelerate the process of dehydration of the phosphogypsum strata. The balance of the sludge collector should be assessed in two periods: the initial period when the sludge collector cells are filled, bounded by the primary dam, and the subsequent period when the reservoir is built up by erecting secondary dams from the stored material. In the initial period, the operating mode of the sludge collector is divided into two stages: in the first stage, a pond is formed above the layer of sludge with a certain predetermined depth; in the second stage, this depth of water in the pond is kept constant by the spillways. The second build-up period is preceded by a period of cell preparation, namely: the draw-off of the pond and drainage of the cell to a moisture content suitable for the dam filling and normal operation of the mechanisms used in the construction of dams. This article presents the results of filtration studies in sludge collectors with an impermeable screen (made of polymer film, asphalt-polymer concrete, etc.) above the screen drainage system. The calculating methods for the determination of filtration parameters in the second period of operation are described: when the pulp supply stops, and a pond of clarified water with a depth of H0 is drawn off.

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Physical modeling of the filtration process through the dam base

Cited by 17 publications

References 16 publications

Assessment of damage during the formation and passage of mudflows in the Tashkent region

Assessment of damage during the formation and passage of mudflows in the Tashkent region

The flow Confluence of river systems of the Pskem and Koksu river basins

Methods for calculating the balance during the period of draw-off, drainage of sludge collector cells and construction of secondary embankment dams

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