Long-term variations in the granulometric composition and spatial distribution of bottom sediments in the Northern Caspian Sea

Khripunov, I. A.; Katunin, D. N.; Azarenko, A. V.

doi:10.1134/s0097807810060096

Cited by 4 publications

(2 citation statements)

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“…Thus, according to numerous glaciological studies, the seabed of the Northern Caspian Sea is regularly plowed by ice hummocks. The current downward trend in the Caspian Sea level seriously increases the risk of ice attacks on oil production facilities and the bottom pipeline network [19,20] . The prospects for a significant increase in the scale of oil and gas production in the Caspian Sea should also be very strictly coordinated with projects for a significant strengthening of the tourist, recreational and environmental functions of the coastal areas of this sea [21,22] .…”

Section: Introduction and Observationmentioning

confidence: 99%

National-political priorities for the development of oil and gas resources in the Russian sector of the Caspian Sea

Eldarov,

Gadzhiev

2023

Nat. Resour. Conserv. Res.

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Section: Introduction and Observationmentioning

confidence: 99%

National-political priorities for the development of oil and gas resources in the Russian sector of the Caspian Sea

Eldarov,

Gadzhiev

2023

Nat. Resour. Conserv. Res.

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“…To date, a huge number of works have been accumulated [13][14][15][16] devoted to the problem of water bodies' contamination with heavy metals. According to many authors, the group of the most common heavy metals includes manganese, nickel, zinc, iron, cadmium, lead, copper and salts thereof, typified by long-term preservation and accumulation in water, bottom sediments and aquatic organisms.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Current State of the Caspian Sea and the Caspian Seal Habitat Analysis

Tasmagambetova

Tovassarov

Bihan-Poudec³

et al. 2019

Eurasian Chem. Tech. J.

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This article is devoted to the determination of heavy metals and harmful organic compounds in sea water – the habitat of the Caspian seal. The group of the most common heavy metals, according to many authors, includes manganese, nickel, zinc, iron, cadmium, lead, copper and their salts, characterized by long-term preservation and accumulation in water, sediments and hydrobionts. The studies were conducted from February 7–12, 2017 on the route from the Kalamkas (Kazakhstan) field through the islands of Kulaly to the village of Bautino. Water samples were taken 10‒20 cm below the sea ice and surface level, each sample was taken in 2 replicates: one for the Kazakhstan laboratory in Almaty and one for the French independent laboratory. Water samples were analyzed for the content of 13 heavy metals such as – Co, Cu, Ti, Bi, Ag, V, Al, Be, Sb, Sn, Fe, Cr, Mo. It was established that in all water samples the content of vanadium exceeds the maximum permissible concentration (MPC) level by 1.5–7.4 times, beryllium ‒ 140–445 times, antimony 13.2–17.2 times. The maximum concentrations of the V and Be contents were found in water samples taken at sampling points No. 1 and 2, and Sb ‒ at points No. 1.6, 7.8. Cobalt, copper, iron and chromium were not detected in the samples presented. The content of other metals (Ti, Bi, Ag, Al, Sn, Mo) was significantly below the permissible levels or below the detection limits of the method. All samples of sea water are contaminated by several organic chemical pollutants, to various degrees and from different origins. Data on the accumulation of petroleum hydrocarbons and heavy metals in the habitat of Caspian seals characterize the toxicological situation in the study region.

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Using nested grids to simulate sediment transport in the Caspian Sea with account taken of global and local scales

et al. 2022

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Introduction. The paper provides information on hydrodynamic and lithodynamic characteristics of processes in the Caspian Sea. A description of applied hydrodynamic models is presented. The numerical simulation of circulation, wave and lithodynamic conditions in the waters of the Northern Caspian Sea, middle and southern parts of the Caspian Sea was first conducted using composite computational grids. Simulated sediment transport results are presented. Results of numerical calculations of sediment accumulations in the second sweep of the Volga-Caspian canal are discussed. Materials and methods. Numerical modeling of coastal wave and hydrodynamic processes is performed using the Delft3d morphodynamic computer model. The Delft3D wave module includes a SWAN (Simulating Waves Nearshore) model for calculating the propagation and generation of waves. The hydrodynamic flow is simulated using the FLOW module, that solves non-stationary hydrodynamic equations and has a sediment transfer unit. Results. Computational grids are generated; they have a large step equal to 5,000 m. One grid is built for the middle and southern parts of the Caspian Sea and the other is made for the Northern Caspian; the grid step is equal to 1,000 m. The height and direction of significant waves in the Northern Caspian are provided. Sediment flows, averaged over 210 days in the SC, are provided. The authors also provide graphs of cumulative accumulation/erosion in the second sweep of the Volga-Caspian canal. Conclusions. The authors show that the average yearly shore-parallel sediment flow in the area of the marine edge of the Volga river delta has a southwesterly direction, and an estimate of its magnitude is provided. An assessment of sediment accumulation in the Volga-Caspian canal is made, and its results are compared with the data obtained in the course of dredging works.

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Long-term variations in the granulometric composition and spatial distribution of bottom sediments in the Northern Caspian Sea

Cited by 4 publications

References 0 publications

National-political priorities for the development of oil and gas resources in the Russian sector of the Caspian Sea

National-political priorities for the development of oil and gas resources in the Russian sector of the Caspian Sea

Assessment of the Current State of the Caspian Sea and the Caspian Seal Habitat Analysis

Using nested grids to simulate sediment transport in the Caspian Sea with account taken of global and local scales

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