Journal articles: 'Dvina'

1

Lobchenko, Е. Е., I. P. Nichiporova, N. N. Olennikova, O. L. Romanyuk, and N. A. Lampert. "Spatio-Time Changes in the Content of Pollutants in the Surface Waters of the Northern Dvina Basin." UNIVERSITY NEWS. NORTH-CAUCASIAN REGION. NATURAL SCIENCES SERIES, no. 1 (213) (March 31, 2022): 57–65. http://dx.doi.org/10.18522/1026-2237-2022-1-57-65.

Full text

Abstract:

The long-term (for the period 2000-2020) series of pollutant content in the water of the river Northern Dvina and its tributaries are analyzed. The spatio-temporal change in the average age and average seasonal concentrations of especially high concentrations that affect water quality, formed as a result of monitoring natural and anthropogenic factors is shown. The interannual and intraannual variability of the content of organic substances (according to COD and BOD5), compounds of iron, copper, zinc, and lignosulfonates in the water of the rivers of the Northern Dvina basin was studied. The influence of anthropogenic factors on the water quality of the right and left tributaries of the upper reaches of the Northern Dvina River - Sukhona, Pelshma, Vychegda. The change in water quality for the period 2010-2020 was assessed throughout the river Northern Dvina, Sukhona, Pelshma, Vychegda, the water quality of which is most affected by wastewater from timber industry enterprises, hydromechanized works in the channel part of the Northern Dvina and its tributaries; agricultural activities of enterprises of the agro-industrial complex, as well as bilge waters of river transport.

APA, Harvard, Vancouver, ISO, and other styles

2

Volsky, K. P. "Dvina is a Russian Name." Вопросы ономастики, no. 1 (2015): 197–202. http://dx.doi.org/10.15826/vopr_onom.2015.1.011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Mazurkevich, Andrey, Ekaterina Dolbunova, Ganna Zaitseva, and Marianna Kulkova. "Chronological timeframes of cultural changes in the Dnepr-Dvina region (7th to 3rd millennium BC)." Documenta Praehistorica 44 (January 3, 2018): 162. http://dx.doi.org/10.4312/dp.10.

Full text

Abstract:

Since the 1960s, more than 250 radiocarbon dates have been obtained for materials in the Upper Western Dvina area, which cover a timeframe from the 7th to the 1st millennium BC. Radiocarbon dates for materials of the Dnepr-Dvina area date the appearance and decline of various cultural traditions – from the formation of the most ancient pottery among hunter-gatherer communities until the appearance of the first stock-breeders in the forest zone, the bearers of cultural traditions of the Corded Ware culture. Dates for materials from the Upper Dvina area show both the existence of hiatuses between some cultural-chronological groups coinciding with some significant climatic and environmental changes, and the quasi (?) co-existence of some of the groups. Could these hiatuses also be traced in material culture, or do they appear because of a lack of data?

APA, Harvard, Vancouver, ISO, and other styles

4

Mazurkevich, Andrey, Ekaterina Dolbunova, Ganna Zaitseva, and Marianna Kulkova. "Chronological timeframes of cultural changes in the Dnepr-Dvina region (7th to 3rd millennium BC)." Documenta Praehistorica 44 (January 3, 2018): 162–75. http://dx.doi.org/10.4312/dp.44.10.

Full text

Abstract:

Since the 1960s, more than 250 radiocarbon dates have been obtained for materials in the Upper Western Dvina area, which cover a timeframe from the 7th to the 1st millennium BC. Radiocarbon dates for materials of the Dnepr-Dvina area date the appearance and decline of various cultural traditions – from the formation of the most ancient pottery among hunter-gatherer communities until the appearance of the first stock-breeders in the forest zone, the bearers of cultural traditions of the Corded Ware culture. Dates for materials from the Upper Dvina area show both the existence of hiatuses between some cultural-chronological groups coinciding with some significant climatic and environmental changes, and the quasi (?) co-existence of some of the groups. Could these hiatuses also be traced in material culture, or do they appear because of a lack of data?

APA, Harvard, Vancouver, ISO, and other styles

5

Kezha, Yury Nikolaevich. "Rogvolod’s polity and formation of an ethnopolitical organization on the territory of the Middle Dvina in the Хth century." Studia Slavica et Balcanica Petropolitana, no. 2 (30) (2021): 116–32. http://dx.doi.org/10.21638/spbu19.2021.208.

Full text

Abstract:

The article discusses the first stages in the formation of an ethnopolitical community on the territory of the Belarusian Dvina, known from the annals as «Polochane». Using basic principles developed by the Vienna School of Historical Ethnography, the author identifies significant socio-political changes in the early medieval (9th–10th centuries) history of Eastern Europe due to the emergence of new elites. The formation of stable ethnopolitical communities is associated with the emergence of these elite groups . The absence of particular artifacts of northern European origin in Polotsk and the Polotsk okrug in the 9th – the first half of the 10th century suggests the independent formation of this center on the basis of local social structures. Significant socio-political changes in Eastern Europe arose during the Viking era (9th–10th centuries), and penetration of the North European military-trade groups into the territory of the Middle Dvina was associated with the beginnings of the active functioning of the West-Dvina branch of the Baltic-Black Sea route (the trade route «from the Varangians to the Greeks»). The development of this route became the main reason why Scandinavian leader Rogvolod came to the Polotsk region and formed a territorial and political organization, conditionally referred to as the «Rogvolod Polity». After the middle to the second half of the 10th century, a social transformation took place on the territory of the Middle Dvina, associated with the formation of elite military-trade groups and the formation of a brigade culture. The Rogvolod Polity, as the first stable territorial and political organization in the Dvina basin, created the institutional foundations for the subsequent consolidating ideology (the «core of tradition» according to R. Wenskus), embodied in the 11th century Polotsk princes Rogvolodovichi in the formation of the ethno-political community «Polochane».

APA, Harvard, Vancouver, ISO, and other styles

6

Johnston, Sarah Ellen, Natalia Shorina, Ekaterina Bulygina, Taisya Vorobjeva, Anna Chupakova, Sergey I. Klimov, Anne M. Kellerman, et al. "Flux and Seasonality of Dissolved Organic Matter From the Northern Dvina (Severnaya Dvina) River, Russia." Journal of Geophysical Research: Biogeosciences 123, no. 3 (March 2018): 1041–56. http://dx.doi.org/10.1002/2017jg004337.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Belesov, Artyom V., Timofey V. Rezviy, Sergey A. Pokryshkin, Dmitry E. Lakhmanov, Dmitry G. Chukhchin, and Alexandr Yu Kozhevnikov. "Impact of Coastal Sediments of the Northern Dvina River on Microplastics Inputs to the White and Barents Seas." Journal of Marine Science and Engineering 10, no. 10 (October 13, 2022): 1485. http://dx.doi.org/10.3390/jmse10101485.

Full text

Abstract:

The Northern Dvina River flowing into the White Sea may be one of the main sources of microplastic (MP) pollution in the Arctic region. The coastal sediments of the Northern Dvina River act as an intermediate link in the transport of microplastics to the areas of the White and Barents Seas. The µFT-IR and Py-GC/MS methods were used to determine that up to 200 particles or 120 mg of MP per kg could accumulate in the coastal sediments of the Northern Dvina River. Coastal sediments tend to accumulate ABS and PS plastic particles with a particle size of around 200 µm. The accumulated microplastics (218 particles or 117 mg per kg of sediment per year) are carried away by strong currents, especially during spring flooding, resulting in pollution of the Barents and White Seas. The obtained data play an important role in assessing the MP pollution of the Arctic region, especially the White and Barents Seas.

APA, Harvard, Vancouver, ISO, and other styles

8

Abdulaeva, I. A., and V. E. Loba. "Insult of nobility in Dvina charter." Juridical Journal of Samara University 7, no. 1 (July 7, 2021): 18–24. http://dx.doi.org/10.18287/2542-047x-2021-7-1-18-24.

Full text

Abstract:

The article is devoted to the issue of protecting personal honor and dignity during the period of validity of the Dvina Charter (13971398). The text of the Charter explains that insult of nobility, which means a dismissive (negative) assessment of a person and personal behavior in relation to someone class affiliation made in verbal form or by certain actions, is under the criminal-legal prohibition. The purpose of the work is to show the essential features of corpus delicti in the field of insult of nobility containing in the Dvina Charter. This corpus is an important lever of criminal-legal protection of honor and dignity, with considering representation on acceptable form of negative assessment of a person, depending on his class affiliation. This theme is relevant due to the fact that honor and dignity are the values of human society and are inherent in man throughout the history of his existence. And it is appropriate to recall that the society in which we live is characterized by a deep moral crisis, in which these values seem to be pushed into the background, and the protection of these enduring values, based on the principles of humanism and the saving of criminal repression, is transferred to the plane of administrative offenses. It is possible to confirm the correctness of the approach, chosen by the legislator, comparing historical facts. So we consider the task of researching the theme on the criminal-legal protection of personal honor and dignity in the Dvina Charter is scientifically relevant.

APA, Harvard, Vancouver, ISO, and other styles

9

Speranskaya, N. A., and K. V. Tsytsenko. "Evapotranspiration in the basins of the Northern Dvina and the Western Dvina rivers and its variability." Russian Meteorology and Hydrology 38, no. 8 (August 2013): 567–74. http://dx.doi.org/10.3103/s1068373913080086.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Chalov, S. R., P. N. Terskii, L. E. Efimova, A. I. Terskaia, V. A. Efimov, and I. S. Danilovich. "Problems of hydrological monitoring in transboundary rivers of Eastern Europe (on the example of the Western Dvina." Engineering survey 13, no. 1 (June 17, 2019): 32–44. http://dx.doi.org/10.25296/1997-8650-2019-13-1-32-44.

Full text

Abstract:

Transboundary rivers are the connecting threads of different states. Hydrological monitoring and water quality control may vary significantly in different countries and leads to difficulties in solving various water management tasks. Trans-border areas require the resolution of a number of special issues, often in the field of interstate relations. This article presents the results of the analysis of hydrological processes monitoring organization in transboundary river basins of Russia and Eastern Europe. The assessment of typical monitoring problems on the example of the Western Dvina river basin under the circumstances of changing population of the territory and legislative framework governing water management is given. From the analysis of the official information sources and field observations, the structure of hydrological observations in the Western Dvina basin in Russia, Belarus and countries of the European Union is compared with their changes over time. Information on the number and density of the monitoring network stations is given, existing standards and documents regulating the procedure of observations, the composition of the measured parameters, the quality of measurements and the availability of monitoring data are compared. The analysis of methods of network observations of suspended sediments in the Western Dvina basin was carried out. The uncertainty of measurements of the concentration of suspended sediments at the outlet in the Russian part of the Western Dvina basin, caused by the existing methods and, thus, typical for determining this parameter on the observation network in the Russian Federation, is revealed. It is shown that differences and uncertainties in the collection and processing of hydrological information in different countries are a key difficulty in organizing monitoring, both at the international and at the state level.

APA, Harvard, Vancouver, ISO, and other styles

11

Potapov, GS, and YuS Kolosova. "Local fauna of bumblebees (Hymenoptera, Apidae) in the lower reaches of the Northern Dvina River." Arctic Environmental Research 19, no. 2 (July 5, 2019): 49–55. http://dx.doi.org/10.3897/issn2541-8416.2019.19.2.49.

Full text

Abstract:

This article is devoted to an investigation of the local fauna of bumblebees in the lower reaches of the Northern Dvina River in northern Russia where 27 species of bumblebees were found during the present study. The basis of the local fauna of bumblebees in the lower reaches of the Northern Dvina River is related to species with a wide range. The majority of the species are Transpalaearctic. Holarctic, Sub-Transpalaearctic, whereas West-Central Palaearctic are less represented. According to the latitudinal aspect the majority of the species are temperate, and the rest are boreal and arcto-temperate. One of species found in the local fauna is subboreal. The number of species in the studied local fauna is the largest among the local faunae of the northern part of the Arkhangelsk Region. It is comparable to the local faunae of the southern part of this region. Here is recorded species such asBombussoroeensis,B.distinguedus,B.ruderarius,B.veteranus,B.humilis, and others, which are not typical of native taiga habitats but are the meadow species in the European North of Russia. Due to the wide development of meadows and ruderal communities in the lower reaches of the Northern Dvina River, these species are widely represented here. The rare species in the studied local fauna areB.patagiatus,B.humilis,B.consobrinus, andB.schrencki.

APA, Harvard, Vancouver, ISO, and other styles

12

Kozlov, Vladimir, and Aleksandr Kozlov. "A STUDY OF FISHES SPAWNING BIOTOPES: A METHODICAL APPROACH." Fisheries 2020, no. 1 (February 26, 2020): 57–62. http://dx.doi.org/10.37663/0131-6184-2020-1-57-62.

Full text

Abstract:

The spawning biotopes of fishes inhabiting upper reaches of Volga, Dnepr and Western Dvina rivers are ranged. Seven ecological groups are identified. Keys for potential spawning biotopes identification are given.

APA, Harvard, Vancouver, ISO, and other styles

13

Neverova, N. V., and A. V. Chupakov. "Estimation of hydrocarbon accumulation by hydrobionts in the estuary of the Northern Dvina River." Marine Biological Journal 3, no. 3 (September 28, 2018): 35–42. http://dx.doi.org/10.21072/mbj.2018.03.3.04.

Full text

Abstract:

The article contains the results of the research of the content of a mass fraction of petroleum hydrocarbons in the bottom layer of water as well as in sediment and tissues of bivalves sampled in the estuarial of the Northern Dvina River during 2009–2016 in the seasons of the highest filtration activity of mollusks. Accumulation levels of petroleum hydrocarbons in water, sediments and tissues of bivalves in the Northern Dvina estuary were estimated. Dependence between petroleum hydrocarbons accumulation level in bivalves’ tissues and pollution level of their habitat was studied. Quantitation of petroleum hydrocarbons content in the tissues of bivalves, in the bottom layer of water and sediments was carried out by fluorometric method. It is found that the mass fraction of petroleum hydrocarbons in the tissues of bivalves didn’t exceed the level for relatively clean water in all studied areas of the river. Considering the mass fraction of petroleum hydrocarbons in bottom sediments of the Northern Dvina estuary, it can be attributed mostly to the uncontaminated and slightly contaminated areas, except for local areas of the river within the city limits. In the bottom layer of water in the studied region, the content of the mass fraction of the petroleum hydrocarbons exceeds the state standards in some sampling points. It is concluded that further comprehensive analysis of biotic and abiotic factors is needed to study complex environmental gradients.

APA, Harvard, Vancouver, ISO, and other styles

14

Mikusheva, Maria, Maria Pogojeva, Ekaterina Kotova, Alexsander Kozhevnikov, Eleonora Danilova, Anfisa Berezina, and Evgeniy Yakushev. "Floating Riverine Litter Flux to the White Sea: Seasonal Changes in Abundance and Composition." Journal of Marine Science and Engineering 11, no. 2 (January 31, 2023): 293. http://dx.doi.org/10.3390/jmse11020293.

Full text

Abstract:

Arctic rivers bring litter from their basins to the sea, but accurate data for the Arctic do not exist yet. This study presents the first assessment of floating macro litter input (>2.5 cm) from the Northern Dvina and Onega rivers to the White Sea. The observations were performed based on the European Marine Strategy Framework Directive (MSFD) methodology and using the mobile application of the Joint Research Centre (Ispra, Italy). The results of observations from May 2021 to November 2021 show that 77% of floating objects were of natural origin (mainly leaves, wood and bird feathers). Of the particles of anthropogenic origin, 59.6% were represented by various types of plastics, 27.7% were processed wood, 8.5% paper/cardboard, 2.7% metal, 1.1% were rubber and <1% textiles. The average monthly input of anthropogenic macro litter by the Northern Dvina varies from 250 to 1700 items/hour, and by Onega from 520 to 2350 items/hour. The level of pollution of the studied rivers was found to be higher than in some Europeans rivers but lower than in China. The mass discharge of macroplastics in the Northern Dvina River was compared with the estimates of the discharge of meso- and microplastics; that allowed us to show that the discharge of macroplastics in mass units is much higher than of micro- and mesoplastics.

APA, Harvard, Vancouver, ISO, and other styles

15

Gasilin, V. V., and M. V. Sablin. "Species of the genus Martes in the northwest of the Russian Plain in the Holocene." Proceedings of the Zoological Institute RAS 317, no. 2 (June 25, 2013): 125–35. http://dx.doi.org/10.31610/trudyzin/2013.317.2.125.

Full text

Abstract:

The problem of a sable (M. zibellina) and a pine marten (M. martes) potential cohabitation in the northwest of Eastern Europe was resolved using methods of multidimensional data analysis for the first time. The skulls (n = 48) and mandibles (n = 194) of representatives of the genus Martes from ten archaeological sites of the middle Holocene (Neolithic camps) and late Holocene (Iron Age settlements) of Onega Lake region and upper reaches of Western Dvina River region were studied. 18 complete skulls and large fragments of skulls were identified morphologically as M. martes remains. 42 mandibles of M. martes from eight middle and late Holocene sites of Western Dvina River region and two mandibles of M. zibellina from two middle Holocene sites of Onega Lake region were identified using discriminant analysis methods (8 – 15 metrical characters in each model).

APA, Harvard, Vancouver, ISO, and other styles

16

Vasilyev, Valery L. "Revisiting Great Rivers’ Names: Volga, Zapadnaya Dvina, Dnieper." Вопросы ономастики 16, no. 4 (2019): 9–32. http://dx.doi.org/10.15826/vopr_onom.2019.16.4.043.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Двоеглазова, Ксения Сергеевна, Владислав Аркадьевич Шелутко, Ksenia Dvoeglazova, and Vladislav Shelutko. "HEAT FLOW DYNAMICS OF THE NORTHERN DVINA RIVER." Proceedings of the Karelian Research Centre of the Russian Academy of Sciences, no. 9 (September 27, 2021): 15. http://dx.doi.org/10.17076/lim1388.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Aleksandrov, V., and Yu Sinitsa. "Bridge over the River Severnaya Dvina in Archangelsk." Structural Engineering International 1, no. 1 (February 1991): 12–14. http://dx.doi.org/10.2749/101686691780617986.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Smirnov, I. A. "Duke Aleksandr Vyurtembergskii Canal (North Dvina water system)." Hydrotechnical Construction 31, no. 1 (January 1997): 53–61. http://dx.doi.org/10.1007/bf02767289.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Klimovskiy, Nikolay, Sergey Artemiev, and Nikolay Matveev. "THE PETROLEUM PRODUCTSOF BOTTOM SEDIMENTS TO THE LOWER REACHES OF THE NORTHERN DVINA AND DVINA BAY OF THE WHITE SEA." Астраханский вестник экологического образования 19, no. 3 (2020): 35–41. http://dx.doi.org/10.36698/2304-5957-2020-19-3-35-41.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Studenov, Igor, Dmitriy Chupov, Gennadiy Ustyuzhinskiy, and Alexey Tortsev. "RESULTS OF ATLANTIC SALMON INVESTIGATIONS IN NORTHERN DVINA RIVER DURING FISHING FOR RESEARCH PURPOSES." Fisheries 2020, no. 3 (June 16, 2020): 64–70. http://dx.doi.org/10.37663/0131-6184-2020-3-64-70.

Full text

Abstract:

Since 2008, due to the change in the fishery research financing system, a decrease in research variety was noticed. After changes in fisheries legislation, the use of the "quasi-budget" financing through the implementation of "scientific" quotas was discontinued. Obvious enough, that the destruction of valuable living resources caught during research fishing led to inability of fisheries research to ensure innovative development of the branch, as well as to preserve the scope of research achieved by 2008. Despite this, the studies carried out in 1994-2014 have significantly expanded the understanding of the Atlantic salmon biology in the Northern Dvina River. The observations produced extensive material on migration dynamics, catch on effort in fishing gear, length and weight indicators, sex and age structure of spawning herds of Atlantic salmon of the Northern Dvina River.

APA, Harvard, Vancouver, ISO, and other styles

22

Potapov, GS, and YuS Kolosova. "Contribution to the knowledge of the fauna of the long-tongued bees (Hymenoptera, Apoidea: Megachilidae, Apidae) in the north of the Arkhangelsk Region." Arctic Environmental Research 19, no. 3 (November 15, 2019): 99–105. http://dx.doi.org/10.3897/issn2541-8416.2019.19.3.99.

Full text

Abstract:

This article is devoted to a study of the fauna of the long-tongued bees in the north of the Arkhangelsk Region, which is located in the northeast of the European part of Russia, but excludes the Arctic islands. This group includes the bees of the families Megachilidae and Apidae. Forty-four (44) species of bees were found in this region. Most of them (29) are bumblebees (genus Bombus). Fourteen (14) species are megachilid bees (genus Osmia, Coelioxys and Megachile) and one species is Apis mellifera. The largest number of species (39) was recorded in the lower reaches of the Northern Dvina River, due to the long research on this territory. The lowest number of species (16) was recorded in the Mezensky District. In the north of the studied region, the tundra species of B. lapponicus is only presented for the Mezensky District. Many species of bumblebees in the regional fauna belong to the ecological group of the meadow species. These are B. soroeensis, B. ruderarius, B. rupestris and a number of others. They are typical for meadow and ruderal habitats, and are usually not presented in the native taiga habitats. These meadow species are widely represented in the valleys of large rivers, such as the Northern Dvina, the Onega, and the Mezen. Compared to bumblebees, megachilid bees are much rarer in the north of the Arkhangelsk Region. Apis mellifera is presented in the lower reaches of the Northern Dvina River, but here it is rare, compared to the southern part of the Arkhangelsk Region.

APA, Harvard, Vancouver, ISO, and other styles

23

Gusev, Yeugeniy M., and Olga N. Nasonova. "Application of a technique for scenario prediction of climate change impact on the water balance components of northern river basins." Journal of Hydrology and Hydromechanics 62, no. 3 (September 1, 2014): 197–208. http://dx.doi.org/10.2478/johh-2014-0025.

Full text

Abstract:

Abstract The scenario forecasting technique for assessing changes of water balance components of the northern river basins due to possible climate change was developed. Three IPCC global emission scenarios corresponding to different possible scenarios for economic, technological, political and demographic development of the human civilization in the 21st century were chosen for generating climate change projections by an ensemble of 16 General Circulation Models with a high spatial resolution. The projections representing increments of monthly values of meteorological characteristics were used for creating 3-hour meteorological time series up to 2063 for the Northern Dvina River basin, which belongs to the pan-Arctic basin and locates at the north of the European part of Russia. The obtained time series were applied as forcing data to drive the land surface model SWAP to simulate possible changes in the water balance components due to different scenarios of climate change for the Northern Dvina River basin

APA, Harvard, Vancouver, ISO, and other styles

24

Kravtsova, Valentina, Olga Vachnina, Serafimа Lebedeva, Evgeniy Charkovets, and Ekaterina Chalova. "Features of the methodology for studying the dynamics of tidal rivers deltas in the northern regions using satellite images (the Northern Dvina as example)." Geoinformatika, no. 1 (April 4, 2022): 17–31. http://dx.doi.org/10.47148/1609-364x-2022-1-17-31.

Full text

Abstract:

Using satellite images from the KeyHole 1977 and Sentinel-2B 2020 satellites, the dynamics of the tidal delta of the Northern Dvina River was investigated. When choosing images, it is necessary to take into account seasonal and tidal fluctuations in the water level; images for the dry season with a close tide phase at the moments of shooting in different years were selected. The first compiled map of delta dynamics for the period 1977–2020 shows that the growth of delta, noted by researchers earlier, continues – the attachment of islands along the sea edge to it, the accumulation of sediments and an increase in the area of channel islands in the main river-branches, narrowing and disappearance of small streams on the delta islands. But to the long-term tendency of delta growth, the processes of erosion of the coast on the islands of the sea edge are added from the side of the Dvina Bay.

APA, Harvard, Vancouver, ISO, and other styles

25

Tortsev, Alexey M. "The system of factors of anthropogenic impact on the fish fauna of the Northern Dvina river basin." RUDN Journal of Ecology and Life Safety 30, no. 4 (December 30, 2022): 606–19. http://dx.doi.org/10.22363/2313-2310-2022-30-4-606-619.

Full text

Abstract:

Industry, electric power, utilities, agriculture, mining, construction, shipbuilding, transport and fishing have a constant anthropogenic impact on the Northern Dvina river basin. Identification and qualitative assessment of factors of anthropogenic impact on the fish fauna of the Northern Dvina river basin within the boundaries of the Arkhangelsk region is the aim of the research. Open data of public authorities on anthropogenic impact and scientific publications are the basis for the research. The main factors of anthropogenic impact on fish fauna have been identified. The impact is multifactorial. Fishing reduces the number of fish populations, and economic activities in the water area and the banks of the water body worsen the conditions of the fish habitat. This leads to a change in the parameters of fish populations. Reconstruction of existing wastewater systems and construction of new ones, as well as the introduction of restrictions on the use of forest resources in the coastal zone are directions for reducing the anthropogenic impact.

APA, Harvard, Vancouver, ISO, and other styles

26

Malov, Aleksandr, Mikhail Gontarev, Khikmatulla Arslanov, Fedor Maksimov, and Aleksey Petrov. "Radiocarbon Dating of Groundwater of the Northern Dvina Depression." “Vestnik of Northern (Arctic) Federal University. Series "Natural Science", no. 4 (December 20, 2016): 5–16. http://dx.doi.org/10.17238/issn2227-6572.2016.4.5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Korobov, V. B., V. P. Shevchenko, and E. I. Kotova. "UNRESOLVED TASKS OF INVESTIGATING THE SEVERNAYA DVINA RIVER MOUTH." Journal of Oceanological Research 50, no. 2 (August 29, 2022): 125–38. http://dx.doi.org/10.29006/1564-2291.jor-2022.50(2).6.

Full text

Abstract:

The Severnaya Dvina River mouth is one of the most studied water objects in Russia. However, many problems still remain insufficiently understood and covered in the scientific literature, due to the exceptional complexity of natural processes that occur in branched tidal deltas. The authors systematize the problems that need to be solved and propose ways to implement. Environmental monitoring is singled out as a separate problem. It is concluded that it is necessary to develop an interdepartmental research program for the entire estuary region.

APA, Harvard, Vancouver, ISO, and other styles

28

Vekhov, N. V. "Natural vegetation complexes of the Northern Dvina river floodplain." Polar Geography 19, no. 2 (April 1995): 127–37. http://dx.doi.org/10.1080/10889379509377564.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Magritsky, Dmitry, Serafima Lebedeva, Vadim Polonsky, and Elena Skripnik. "Inundations in the delta of the Northern Dvina River." Journal of the Geographical Institute Jovan Cvijic, SASA 63, no. 3 (2013): 133–45. http://dx.doi.org/10.2298/ijgi1303133m.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Leshchev, A. V., G. D. Khomenko, V. B. Korobov, A. S. Lokhov, A. L. Chultsova, N. N. Ruzhnikova, N. N. Makhnovich, et al. "Fieldworks in the Northern Dvina estuary in March 2014." Oceanology 55, no. 2 (March 2015): 315–17. http://dx.doi.org/10.1134/s0001437015020095.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Mikhailenko, Anna, Irina Dotsenko, Asya Ovsepyan, and Alina Zimovets. "Behaviour and distribution of heavy metals at the boundary of “water-bottom sediments” in mouth zones of rivers." E3S Web of Conferences 265 (2021): 02016. http://dx.doi.org/10.1051/e3sconf/202126502016.

Full text

Abstract:

The aquatic elementary landscapes of the Don and Northern Dvina Rivers mouth zones as arenas of mass transfer of heavy metals (HM) are studied. The results of long-term comprehensive studies of the authors, which included sampling of water and the upper layer of bottom sediments in order to determine the content of mercury, copper, methane, hydrogen sulfide, as well as pH and Eh values, are presented. According to the type of prevailing geochemical conditions and the level of anthropogenic impact, natural, man-made and natural-anthropogenic aquatic elementary landscapes are distinguished. The bottom water layers in both rivers were characterized by positive Eh values, but it should be noted that they were generally relatively low for surface watercourses. According to the values of the redox potential and the hydrogen index, the methane content and the total hydrogen sulfide, the presence of the following conditions is proved – oxygen, gley, hydrogen sulfide, oxygen-gley and gley-hydrogen sulfide. At the water - sediment interface, in most cases, there was a decrease in pH values by the first tenths of the values, while Eh usually decreased quite sharply, often to negative values. In terms of methane content, the bottom sediments of the aquatic elementary landscapes of the Don and Northern Dvina rivers were similar, while the concentration of total hydrogen sulfide was higher in the Don. It is shown that in the mouth zone of the Don and Northern Dvina rivers, in areas subject to constant organic pollution and eutrophication, there is an increase in the total content of mercury and copper in the bottom sediments. Higher concentrations of gross mercury will generally be found in natural and anthropogenic landscapes dominated by hydrogen sulfide and gley-hydrogen sulfide environments. The important role of microparticles of the polydisperse medium of bottom sediments in the deposition of copper and mercury is revealed.

APA, Harvard, Vancouver, ISO, and other styles

32

Yershov, P. N., A. A. Matvienko, and E. P. Voronina. "Variability of squamation of European flounder Platichthys flesus (Pleuronectidae) in the White Sea." Proceedings of the Zoological Institute RAS 323, no. 2 (June 25, 2019): 105–11. http://dx.doi.org/10.31610/trudyzin/2019.323.2.105.

Full text

Abstract:

Squamation of the European flounder Platichthys flesus is formed by the common cycloid scales and the bony plates. The number of the bony plates and their localization on the body vary considerably in the flounders from different parts of their range. Study of the variability of bony plates coverage in the European flounder are of importance for understanding structural diversity and for use of this character for morphological differentiation of the local populations. We compared the bony plates on the eye side of the body in the flounders from Chupa Inlet (Kandalaksha Bay) and from the delta of the North Dvina River (Dvina Bay). The localization and the number of the bony plates near the bases of dorsal, anal, pectoral fins and above/below of the lateral line were analyzed. Our results clearly showed that the compared samples can be characterized by certain phenotypes, differing by number and location of the bony plates on the eye side of the fish body. The individuals of one phenotype were found in Chupa Inlet only. Small amount of the bony plates on the body and the presence of relatively wide aggregation of the bony plates near the pectoral fin are the traits of this phenotype. Three phenotypes were distinguished among fishes from the North Dvina delta. The absence of the bone plates on the most part of the body is typical for the prevalent phenotype. Individuals of the second phenotype were similar to the flounder from Chupa Inlet. Large amount of the bony plates covering the whole eye side of the body is characteristic for the third phenotype. The obtained results complement the existing data on the variability of squamation of the White Sea flounders, and indicate the importance of this character in the study of the differences between local populations in this region.

APA, Harvard, Vancouver, ISO, and other styles

33

Tortsev, Alexey. "Biological features of the spawning part of the Atlantic salmon (Salmo salar Linnaeus, 1758) population of the Northern Dvina river basin." Fisheries 2022, no. 2 (April 13, 2022): 59–65. http://dx.doi.org/10.37663/0131-6184-2022-2-59-65.

Full text

Abstract:

Salmon fishing in the lower reaches of the Northern Dvina River is based on the use of the spawning part of the Atlantic salmon population. Fisheries regulation measures are developed using knowledge of the biology of the species. Thus, the aim of the research is a comprehensive understanding of the biology of the spawning part of the salmon population in the Northern Dvina River basin based on the generalization of materials from commercial catches for the period 1931-2014. After feeding in the northeastern part of the Atlantic Ocean, adult salmon return to spawn at the age of 5+. The reproductive part of salmon populations is dominated by females. The average size and weight indicators of salmon making spawning migrations are 77,42 cm and 5,43 kg. It has been established that in the last decade of observations, the size and weight characteristics of the reproductive part of the Atlantic salmon populations in the Severodvinsk basin have stabilized. This allows us to conclude that there are effective measures to regulate the legal salmon fishery.

APA, Harvard, Vancouver, ISO, and other styles

34

Lyubas, Artem A., Alena A. Tomilova, Artem V. Chupakov, Ilya V. Vikhrev, Oksana V. Travina, Alexander S. Orlov, Natalia A. Zubrii, Alexander V. Kondakov, Ivan N. Bolotov, and Oleg S. Pokrovsky. "Iron, Phosphorus and Trace Elements in Mussels’ Shells, Water, and Bottom Sediments from the Severnaya Dvina and the Onega River Basins (Northwestern Russia)." Water 13, no. 22 (November 14, 2021): 3227. http://dx.doi.org/10.3390/w13223227.

Full text

Abstract:

Trace elements in freshwater bivalve shells are widely used for reconstructing long-term changes in the riverine environments. However, Northern Eurasian regions, notably the European Russian North, susceptible to strong environmental impact via both local pollution and climate warming, are poorly studied. This work reports new data on trace elements accumulation by widespread species of freshwater mussels Unio spp. and Anodonta anatina in the Severnaya Dvina and the Onega River Basin, the two largest subarctic river basins in the Northeastern Europe. We revealed that iron and phosphorous accumulation in Unio spp. and Anodonta anatina shells have a strong relationship with a distance from the mouth of the studied river (the Severnaya Dvina). Based on multiparametric statistics comprising chemical composition of shells, water, and sediments, we demonstrated that the accumulation of elements in the shell depends on the environment of the biotope. Differences in the elemental composition of shells between different taxa are associated with ecological preferences of certain species to the substrate. The results set new constraints for the use of freshwater mussels’ shells for monitoring riverine environments and performing paleo-reconstructions.

APA, Harvard, Vancouver, ISO, and other styles

35

Markova, Irina Mikhailovna, Aleksey Pavlovich Moguev, Dilshod Raimovich Bazarov, and Bekhzod Eshmirzaevich Norkulov. "Reconstruction of the water area of the river Western Dvina in the Smolensk region." Agrarian Scientific Journal, no. 5 (May 25, 2020): 107–9. http://dx.doi.org/10.28983/asj.y2020i5pp107-109.

Full text

Abstract:

The article presents a set of engineering measures for the reconstruction of the water sector of the Western Dvina River in the Smolensk region. The measures are aimed at preventing the negative impact of water and protecting territories from flooding and flooding, as well as at restoring the transport capacity of the river’s water sector.

APA, Harvard, Vancouver, ISO, and other styles

36

Vasil'ev, Victor, and Ekaterina Vasil'eva. "Triploid forms’ karyotypes of spined loaches from the genus Cobitis (Actinopterygii: Cypriniformes: Cobitidae) of the upper Dnieper and Western Dvina rivers: Analysis of the triploids’ origin." Acta Ichthyologica et Piscatoria 52, no. 1 (March 29, 2022): 67–75. http://dx.doi.org/10.3897/aiep.52.81191.

Full text

Abstract:

Unisexual forms of lower vertebrates (fish, amphibians, and reptiles) reproduced by parthenogenesis, gynogenesis, or hybridogenesis are represented by diploids, triploids, or tetraploids, whose origin is associated with interspecific hybridization. Among fish species, the highest variability of unisexual polyploids was found in the genus Cobitis. The structure of their genomes and putative parental species holds great interest for the investigation in association with questions about possible evolutionary success. In particular, it serves to elucidate the possible high colonization properties of a few polyploid forms, in contrast to the local history of rather numerous hybrid forms with a limited distribution. Therefore, the aim of this study was to describe the karyotype structure of two newly discovered triploid forms of the genus Cobitis, to analyze their origin and putative parental species. The karyotype structure of 182 spined loach individuals from the Western Dvina River and 91 individuals from the upper Dnieper River of the Smolensk District of Russia was studied. A total of 121 studied individuals from the Western Dvina comprised triploid females with a chromosome number 74 and karyotype consisting of 13 meta-, 39 submeta-, and 22 subtelo-acrocentric chromosomes. Among loaches collected in the upper Dnieper River, 42 triploid females were found with 74 chromosome number including 23 meta-, 26 submeta-, and 25 subtelo-acrocentric chromosomes. Other individuals from both localities were karyologically identified as Cobitis taenia Linnaeus, 1758 with 2n = 48. The triploid form of spined loaches of the Western Dvina River most likely arose as a result of the hybridization of Cobitis tanaitica Bǎcescu et Mayer, 1969 and C. taenia. The range of C. tanaitica, whose karyotype is characterized by an evolutionarily fixed Y-autosomal translocation, is limited to the rivers of the northern coast of the Black Sea. Therefore, hybridization probably happened in late Pleistocene in the Dnieper River system, where both parental species occur. The triploid form that arose here is unique for the Baltic Sea basin. Probably, it colonized the Western Dvina through the artificial Berezinskaya water system (Berezina Canal = Daugava–Dnieper Canal), but at the same time it was forced out of its area of origin by other triploid forms which are now widespread there. According to the karyotype structure, the triploid form, common for both the upper and lower reaches of the Dnieper, has a trihybrid origin, with probable hybridization of Cobitis elongatoides Bǎcescu et Mayer, 1969, C. tanaitica, and yet unidentified species Cobitis sp. Both studied triploid forms are parts of unisexual-bisexual complexes, in which their putative diploid maternal species (C. tanaitica and C. elongatoides) are absent, and the role of the host species involved in reproduction belongs to C. taenia.

APA, Harvard, Vancouver, ISO, and other styles

37

Yershov, P. N. "Karyotype of the anadromous whitefish Coregonus lavaretus pidschian (Gmelin, 1788) from the Northern Dvina River (White Sea Basin)." Proceedings of the Zoological Institute RAS 314, no. 4 (December 25, 2010): 405–10. http://dx.doi.org/10.31610/trudyzin/2010.314.4.405.

Full text

Abstract:

The karyotype of anadromous whitefish from the Northern Dvina River was examined. The chromosomal complement consists of 9 pairs of biarmed chromosomes (8 pairs of meta- and 1 pair of submetacentrics) and 31 pairs of uniarmed (subtelo- and acrocentric) chromosomes, 2n=80, NF=98. The variability in the length of metacentrics of the first pair and the number of B-chromosomes was found.

APA, Harvard, Vancouver, ISO, and other styles

38

Sharoglazova, G. A., and K. I. Markovich. "Results of studying the Earth’s crust deformations near the cascade of hydroelectric power stations on the Western Dvina." Geodesy and Cartography 940, no. 10 (November 20, 2018): 7–15. http://dx.doi.org/10.22389/0016-7126-2018-940-10-7-15.

Full text

Abstract:

The article is devoted to the problem of the interdependent influence of the tectonic and man-made factors on the state of the earth’s crust in the region of the HPP cascade on the Western Dvina flowing along the Polotsk-Kurzeme belt of tectonic faults. Here the results of geodetic researches on a geodynamic range “Polotsk Hydroelectric Power Plant” are given. The parameters of the horizontal earth’s crust deformations, obtained from three cycles of GNSS observations (2014, 2015 and 2017) at the landfill, are well-coordinated with the construction stages of the HPP and its commissioning. The tectonic faults, in the zone of influence where the Polotsk HPP is located, react to technogenic processes. It is desirable to extend the research to the Vitebsk HPP being built simultaneously with that in Polotsk, by creating a test-field in the district of the geodynamic range similar to the range of Polotsk, and combining them into a single geodetic construction, which is easily achievable with modern satellite technologies. Geodetic studies of geodynamic processes in the cascade of the HPP on the Western Dvina should be supplemented by seismological monitoring.

APA, Harvard, Vancouver, ISO, and other styles

39

Dolbunova, Ekaterina Vladimirovna, and Andrey Nikolaevich Mazurkevich. "TECHNOLOGICAL ANALYSIS OF EARLY-LATE NEOLITHIC POTTERY IN DNEPR-DVINA REGION, TECHNOLOGICAL TRACES AND THEIR INTERPRETATION." Samara Journal of Science 4, no. 4 (December 1, 2015): 24–37. http://dx.doi.org/10.17816/snv20154203.

Full text

Abstract:

Different approaches of pottery making analysis are represented in this article. Major role is devoted to the description of technological traces, which can be observed on pottery of early-late neolithic in dnepr-dvina region, as well as to variety of methods that can be used in the analysis of ceramics manufacture techniques. different ethnographic evidences are discussed here, which allow interpreting changes occurred in technological sphere, that might not always be connected with cultural factors. description of operational sequences used for pottery making dated to early-late neolithic of this region, is represented in this article. characteristic features of these techniques, existed at different periods are analyzed, as well as changes occurred in different parts ofexisted operational sequences. it is supposed that similarity of decor, technology of pottery making, and vessels forms, typical for synchronous sites located in different parts of dnepr-dvina region, might be a marker of one society lived on this territory. Whereas local features in vessels form, decor, and technology of pottery assemblages located on definite sites within small microregions, might reflect cultural identity of society/societies lived there.

APA, Harvard, Vancouver, ISO, and other styles

40

Plavinski, Mikalai, and Radosław Liwoch. "Finds of the Silver Neck Rings from the Great Migration Period, “with a Faceted Hoop and a Double-Loop Lock” from the Territory of the Belarusian Neman and Dvina Region." Stratum plus. Archaeology and Cultural Anthropology, no. 4 (August 30, 2021): 221–30. http://dx.doi.org/10.55086/sp214221230.

Full text

Abstract:

The article addresses a series of finds of silver neck rings from the Migration Period — two whole (Afieraŭščyna, Vialikaje Sialo) and one fragmented (Haradzišča) specimen — from the territory of Belarusian Neman and Dvina Regions, belonging to the type that in Russian-language literature is called neck rings “with a faceted hoop and a double-loop lock”. The dating of finds from Afieraŭščyna and Vialikaje Sialo can be determined on the basis of analogies within the framework of the 5th and, possibly, 6th centuries. The situation with a fragment of a neck ring from the open settlement Haradzišča is more complicated. Considering the fact that this artifact was found in fragmented form, in fact — as a weight silver, one cannot exclude that it could fall into obsolescence somewhat later than other neck rings of this type, and can be dated within the 5th—7th centuries. The finds of silver neck rings “with a faceted hoop and a double-loop lock” from the territory of Belarusian Neman and Dvina Regions significantly broaden the knowledge of the area of distribution of this type of the Great Migration Period neck rings.

APA, Harvard, Vancouver, ISO, and other styles

41

Alabyan, Andrei M., and Serafima V. Lebedeva. "Flow dynamics in large tidal delta of the Northern Dvina River: 2D simulation." Journal of Hydroinformatics 20, no. 4 (March 27, 2018): 798–814. http://dx.doi.org/10.2166/hydro.2018.051.

Full text

Abstract:

Abstract A numerical modelling of flow dynamics in a tidal river mouth of comprehensive morphology is assumed to be one of the most effective methods of both scientific research and civil engineering projects. Realistic results of simulations can be obtained only on the basis of field observations. This approach is realized for a 2D hydrodynamic model of the Northern Dvina River mouth area. The Northern Dvina delta has a very complicated distributary network and suffers from both spring snow-melt floods and autumn storm surges. The STREAM_2D software package based on the 2D shallow water equations was used for the model development. The model was calibrated and validated on the background of water level data at state gauges and special water discharges measurements in the essential delta branches during the semi-diurnal tidal cycles. Sensitivity tests were provided to evaluate the most significant reasons for model errors. It was discovered that the distribution of roughness coefficients amidst delta channels and floodplain does not affect the flow dynamics in the delta significantly. However, the tidal range variations over a neap-spring cycle and mean sea level changes along the delta marine edge are of major importance.

APA, Harvard, Vancouver, ISO, and other styles

42

Tortsev, Alexey, Igor Studenov, and D. Chuprov. "Current state of the atlantic salmon fishing in the lower reaches of the Northern Dvina River." Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences, no. 4 (November 3, 2022): 46–51. http://dx.doi.org/10.19110/1994-5655-2022-4-46-51.

Full text

Abstract:

The aim of the research was to assess the current state of the salmon fishery in the lower reaches of the Northern Dvina River. The material of the research is based on the data of the territorial departments of the Federal Agency for Fishery, regional authorities, and the commission for regulating the production (catch) of anadromous fish species. At present, the importance of salmon fishing as an important source of the population’s well-being has decreased. The contribution to the regional economy has also decreased. Average annual catch of Atlantic salmon in the fishery was 4.3 tons in 2010-2021. In 2020-2022 the fishing areas of second stage were formed and the fishing areas for the remaining fishermen become more concentrate. The reduction of fishing areas has led to a decrease in the number of used fishing gear and salmon catches. At the same time, the catch per effort decreased slightly, and the development of salmon catch volumes remains at a high level, which indicates a distortion in catch statistics. The results of the research can be used to develop measures to regulate the Atlantic salmon fishing in the lower reaches of the Northern Dvina river.

APA, Harvard, Vancouver, ISO, and other styles

43

Pinaevskaya, E. A., and S. N. Tarkhanov. "Pine (Pinus sylvestris L.) cambial growth in Taiga zone of Russian European North." Forestry Bulletin 26, no. 5 (October 2022): 5–14. http://dx.doi.org/10.18698/2542-1468-2022-5-5-14.

Full text

Abstract:

A study was carried out to identify the climatic response in the pine cambial growth under the conditions of excessive moisture in the soils of the northern and middle taiga. The results of the pine trees growth with different apophysis of the cones seed scales from different habitats (the basins of the Northern Dvina, Pinega, Vaga rivers and the mouths of the Mezen and Vychegda rivers) are presented. Significant differences in growth were established between trees with a «convex» and «flat» apophysis of the cones seed scales in the basins of the Northern Dvina, the Pinega and the Vaga rivers and the mouth of the river Vychegda. The values of radial growth in trees with a «flat» apophysis of the cones seed scales are lower than in trees with a «convex» one. It was revealed that different forms of pine have low and close values of the «sensitivity» index (19...27 %), and the variability of this indicator in the more northern coenopopulations is characterized as medium, and in others as medium increased. According to the «stress index», trees of different forms are characterized by a stable and less resistant state to conditions of excess moisture. The cenopopulation of pine at the mouth of the river Mezen and the river basin Pinega established close average values for this indicator. In the river basin of the Northern Dvina, in trees with a «convex» shape of apophysis of the cones seed scales, the average value of the «stress index» is lower than with the «flat» apophysis. In the river basin Vaga and the mouth of the river Vychegda the value of the «stress index» is higher in trees with a «convex» apophysis than in trees with a «flat» shape. Significant correlations were established for the radial growth of various pine trees and air temperature in the study areas. The results obtained can be used in solving environmental problems connected with climate change.

APA, Harvard, Vancouver, ISO, and other styles

44

Mroczkowska, Agnieszka, Dominik Pawłowski, Emilie Gauthier, Andrey Mazurkevich, Tomi P. Luoto, Odile Peyron, Bartosz Kotrys, et al. "Middle Holocene Climate Oscillations Recorded in the Western Dvina Lakeland." Water 13, no. 11 (June 7, 2021): 1611. http://dx.doi.org/10.3390/w13111611.

Full text

Abstract:

Although extensive archeological research works have been conducted in the Serteya region in recent years, the Holocene climate history in the Western Dvina Lakeland in Western Russia is still poorly understood. The Neolithic human occupation of the Serteyka lake–river system responded to climate oscillations, resulting in the development of a pile-dwelling settlement between 5.9 and 4.2 ka cal BP. In this paper, we present the quantitative paleoclimatic reconstructions of the Northgrippian stage (8.2–4.2 ka cal BP) from the Great Serteya Palaeolake Basin. The reconstructions were created based on a multiproxy (Chironomidae, pollen and Cladocera) approach. The mean July air temperature remained at 17–20 °C, which is similar to the present temperature in the Smolensk Upland. The summer temperature revealed only weak oscillations during 5.9 and 4.2 ka cal BP. A more remarkable feature during those events was an increase in continentality, manifested by a lower winter temperature and lower annual precipitation. During the third, intermediate oscillation in 5.0–4.7 ka cal BP, a rise in summer temperature and stronger shifts in continental air masses were recorded. It is still unclear if the above-described climate fluctuations are linked to the North Atlantic Oscillation and can be interpreted as an indication of Bond events because only a few high-resolution paleoclimatic reconstructions from the region have been presented and these reconstructions do not demonstrate explicit oscillations in the period of 5.9 and 4.2 ka cal BP.

APA, Harvard, Vancouver, ISO, and other styles

45

Moroz, M. D. "The aquatic insects of the Zapadnaya Dvina river tributaries, Belarus." Euroasian Entomological Journal 17, no. 1 (January 2019): 201–11. http://dx.doi.org/10.15298/euroasentj.17.3.10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Nemirovskaya, I. A. "Hydrocarbons in the bottom sediments of the Northern Dvina estuary." Water Resources 34, no. 6 (November 2007): 699–706. http://dx.doi.org/10.1134/s0097807807060115.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Boznak, E. I. "The rudd Scardinius erythrophthalmus from tributaries of the Northern Dvina." Journal of Ichthyology 48, no. 5 (June 2008): 408–10. http://dx.doi.org/10.1134/s0032945208050056.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Eremeev, I. I., O. F. Dzyuba, O. V. Lisitsyna, O. V. Buben'ko, and P. N. Podgursky. "New evidence of initial agriculture in the Western Dvina basin." Quaternary International 203, no. 1-2 (July 2009): 67–73. http://dx.doi.org/10.1016/j.quaint.2008.04.026.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Georgiadi, A. G., and O. O. Borodin. "Extreme Low Flows in Rivers of the East European Plain in the 19th–21st Centuries." IOP Conference Series: Earth and Environmental Science 1023, no. 1 (May 1, 2022): 012011. http://dx.doi.org/10.1088/1755-1315/1023/1/012011.

Full text

Abstract:

Abstract This study is focused on extreme low flows in rivers (when water flow is less than or equal to 75 and 90% exceedance probability) in the East European Plain (Volga, Don, Dnieper, Western Dvina, and Northern Dvina) in the 19th–21st centuries. It is shown that the proportion of years in which an extreme low flow is observed in one or more seasons of the year or in the year as a whole during the entire observation period varies from 46 to 57%. In 30 years, a low flow formed only in one basin under consideration, and in 50 years, it was observed in several (from 2 to 5) basins simultaneously. In seven years, an extreme low flow was observed in different hydrological seasons and during the entire years simultaneously in all the rivers and, in nine cases, in four basins. Modern global warming leads to a significant decrease in the number of low-flow years in the winter and summer-autumn low-water seasons and the year as a whole for all the rivers under consideration. In years when severe draughts were recorded in the territories of all river basins under consideration, low flows were recorded only in 1921 and 1972.

APA, Harvard, Vancouver, ISO, and other styles

50

Malyutina, Anna Andreevna. "Bone and antler implements of the Early Neolithic Dnepr-Dvina interfluve settlements: technological and functional features, context." Samara Journal of Science 7, no. 3 (August 15, 2018): 240–47. http://dx.doi.org/10.17816/snv201873216.

Full text

Abstract:

In this paper we consider the results of the use-wear analysis of the bone and antler implements received as a result of excavation of the Early Neolithic settlements on the territory of Dnepr-Dvina interfluve. This kind of research is conducted for this category of archaeological material for the first time. For the analysis we have selected 27 bone, antler and teeth items occurring from two settlements of the Serteysky microregion - Serteya X and Rudnya Serteyskaya. The good preservation of items has allowed us to study macro- and microtraces connected with technology of processing of raw materials and receiving products, ways of usage of finished utilitarian and not utilitarian character items. The following categories of implements have been marked out: knives, awls, pendants, spear-heads, arrowheads, barbed points, preforms, fragments of items with processing traces. The obtained information is correlated to other materials of settlements - ceramics, stone artifacts, economic and cultural characteristic of settlements in general. Ceramic traditions in upper courses of the Western Dvina belong to 7 millennium BC. The earliest ceramic traditions are combined in Serteyskaya archaeological culture. Later, in materials of the Early Neolithic sites influence of Early Neolithic cultures of East Baltics is traced. As a result, on the territory of Podvinya the Rudnyanskaya Early Neolithic culture is formed.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Dvina'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles