On Water Circulation in the Valley Reservoir (Krasnodar Reservoir)

Pogorelov, A. V.; Laguta, Andrey A.

doi:10.18522/1026-2237-2020-4-87-97

Cited by 3 publications

(3 citation statements)

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“…Sediment trapping is accompanied by a continuous restructuring of the underwater topography due to interrelated geomorphological and hydrological processes -sediment deposition, changes in the local structure of currents, etc. (Litovka et al, 2019;Pogorelov, Laguta, 2020;Pogorelov et al, 2021. Note that the above processes are typical for a number of similar hydraulic structures (Zhang Wei et al, 2015;Andjelkovic et al, 2017;Honek et al, 2020;Shiferaw, Abebe, 2021;Li Xin et al, 2023).…”

Section: Introductionmentioning

confidence: 96%

Analysis of the Bottom Topography of the Reservoir Due to Sediment Trapping (According to the Krasnodar Reservoir, Russia)

Pogorelov,

Laguta,

Netrebin

et al. 2023

GES

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Morphometric descriptions of reservoirs are usually limited to the type, shape, altitude position, bed size and volume of water in them. The article presents the results of the analysis of the bottom topography of the Krasnodar reservoir and the transformations of this for 2005-2021. The analysis was carried out based on the materials of bathymetric surveys for the usable volume of the reservoir on an area of 224 km2 with the creation of digital elevation models. The topography of the reservoir bottom is represented by flat sections of flooded accumulative plain with prevailing slopes of about 0.2–0.4°, dissected by riverbeds of lower-order tributaries. The transformation of the topography is caused by gradual silting. The total volume of sediments for this area in 2005-2021 amounted to 127 million m3 with an average siltation layer of 0.4 m. To describe the morphological properties of the bottom topography, we used geomorphometry techniques with the calculation of the BPI index (Bathymetric Position Index) and the classification of mesoscale topography forms based on it. For the riverbed, there are topography forms related to three types of surfaces: flat (Lower Bank Shelves), concave (Depressions, Deep Depressions) and convex (Reef Crests, Back Reefs, Mid-Slope Ridges). The constructed maps reflect the differentiated morphology of the bed surface, the evolution of topography forms and the change in roughness under conditions of continuous transformation of the basin and allow judging the prevailing morphogenetic processes. Morphologically, the coastal zone and the shallow part of the riverbed are the most difficult to construct. Here, along with long-shore reef crests of different genesis, deep depressions and simple depressions in the form of underwater channels on the deltas of extension can form on the accumulative shoal.

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Section: Introductionmentioning

confidence: 96%

Analysis of the Bottom Topography of the Reservoir Due to Sediment Trapping (According to the Krasnodar Reservoir, Russia)

Pogorelov,

Laguta,

Netrebin

et al. 2023

GES

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“…In [8][9][10], the issues of silting control and the problems of cleaning reservoirs from sediments, and methods for preserving the useful volume by creating nano-reservoirs, ponds, reservoirs, and hydraulic washing of sediments are considered. Studies [11,12] consider the issues of siltation of the Krasnodar reservoir using digital elevation models and bathymetric surveys. The authors' approaches are consistent with the results of our research.…”

Section: Introductionmentioning

confidence: 99%

Shear and filtration strength of foundation of channel type hydropower plant building

Bakiev

Babajanova

Babajanov³

et al. 2023

E3S Web of Conf.

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The purpose of the study was to analyze the foundation's filtration strength and the HPP building's shear stability after 38 years of operation as part of the Tuyamuyun hydroelectric complex on the Amudarya River. The analysis was carried out based on field data obtained with the help of 16 piezometers installed in two alignments within the block of the HPP building and vertical drainages in the grassland. The constructed graphs of water pressure fluctuations in piezometers coincide with the nature of the change in the water level in the upper and lower pools. The actual gradients did not exceed the allowable gradient for the shaly sand interlayer and limestone bedding fracture filler. Comparison of the maximum natural gradients and those calculated from model studies using electrohydrodynamic analogies. The stability of the HPP building block is estimated by the maximum piezometric pressure and compared with analytical calculations, and the safety factor is 2.303. In this way, the base's filtration strength and the structure's shear stability are ensured in the entire range of changes in the operating mode of the pressure front of the HPP building block.

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“…In the mouths of rivers flowing into the reservoir, which have very high turbidity rates (Lurie et al, 2005, Alekseevsky et al, 2012Lurie, 2002), the process of intensive delta formation has started (Laguta and Pogorelov, 2019b). The processes of transformation of the Krasnodar reservoir have not been sufficiently studied yet (Kurbatova, 2014;Pogorelov et al, 2017;Laguta and Pogorelov 2018;Laguta and Pogorelov, 2020). The observed changes in the reservoir (in fact, degradation), despite its economic significance, deserve a detailed quantitative analysis.…”

Section: Introductionmentioning

confidence: 99%

Features of the long-term transformation of the Krasnodar reservoir, near the mouth of the Kuban River, Russia

Pogorelov

Laguta²,

Kiselev

et al. 2021

J. Geogr. Sci.

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The article considers the long-term transformation of the Krasnodar valley reservoir, the largest in the North Caucasus. The main functions of the Krasnodar reservoir are irrigation of rice systems and flood protection of land in the Krasnodar reservoir region and the Republic of Adygea. According to topographic maps, Landsat satellite images and field observations (2016)(2017)(2018), four stages of transformation of the floodplain reservoir are identified. The selected stages are characterized by both natural causes (the transformation of the filling deltas into the extended deltas, etc.) and man-made causes (runoff diversions in the delta areas, etc.). The key factor of transformation is the formation of deltas of rivers flowing into the reservoir. Each of the selected stages, against the background of a gradual reduction in the area and volume of the reservoir, is characterized by the peculiarities of the formation of river deltas with the formation of genetically homogeneous sections of delta regions. During the period of operation of the reservoir, the delta of the main Kuban River moved up to 32.4 km and took away an area of 35.4 km 2 of the reservoir. During the formation of the deltas of the Kuban and Belaya rivers, a bridge was formed on the Krasnodar reservoir. The evolution of the delta regions led to the division of the reservoir into two autonomous reservoirs. The total area of the delta regions was 85.9 km 2 by 2018, i.e., 21% of the initial area of the reservoir. The transformation of the Krasnodar reservoir leads to a decrease in its regulated volume and gradual degradation.

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On Water Circulation in the Valley Reservoir (Krasnodar Reservoir)

Cited by 3 publications

References 0 publications

Analysis of the Bottom Topography of the Reservoir Due to Sediment Trapping (According to the Krasnodar Reservoir, Russia)

Analysis of the Bottom Topography of the Reservoir Due to Sediment Trapping (According to the Krasnodar Reservoir, Russia)

Shear and filtration strength of foundation of channel type hydropower plant building

Features of the long-term transformation of the Krasnodar reservoir, near the mouth of the Kuban River, Russia

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