scholarly journals Available for plants phosphorus in the floodplain catenas of the Amur River

2021 ◽  
pp. 61-91
Author(s):  
A. V. Martynov
Keyword(s):  
Soil Profile ◽  
Hydrological Regime ◽  
River System ◽  
Amur River ◽  
River Waters ◽  
River Bed ◽  
The Amur River ◽  
Active Mobilization ◽  
Soil Forming Processes

This work was carried out to study the content and distribution of available for plants phosphorus in different types of floodplain soils along five catenas located in the upper and the middle Amur. It was found that the available for plants phosphorus forms in the soils of floodplains are influenced by the following factors: the structure of the river system, the type of floodplain, the type of vegetation cover, and soil-forming processes. During the long-term transportation of alluvium along the river bed, its hydrogenic weathering occurs with the release of phosphorus into river waters. In the absence of tributaries serving as additional sources of alluvium, the phosphorus content decreases downstream. More intense floodplain and alluvial processes in small floodplains provide renewal of the soil profile and replenishment of phosphorus reserves. In the soils under the birch forest, there is a significant accumulation of phosphorus, in comparison with the soils under meadow vegetation. The development of gley processes leads to active mobilization of phosphorus, but the long-term exposure leads to the depletion of its total reserves. The illimerization processes, initiated and developing when the floodplain hydrological regime of alluvial soils is changed to another one, promote the migration of iron oxides and phosphorus, adsorbed by the former, beyond the soil profile. To summarize, the average content of available for plants phosphorus, depending on the type of soil, decreases downstream from 300–100 mg/kg in the upper Amur to 170–20 mg/kg in the middle Amur. Available for plants of phosphorus are best provided in primitive alluvial layered soils, while in residual floodplain brunezems the lowest content is recorded.

scholarly journals Влияние изменений климата на гидрологический режим реки Амур

2020 ◽  
Author(s):  
A.N. Makhinov ◽  
V.I. Kim
Keyword(s):  
River Basin ◽  
Precipitation Amount ◽  
Hydrological Regime ◽  
Water Levels ◽  
Amur River Basin ◽  
Eastern Region ◽  
Amur River ◽  
Temperature And Precipitation ◽  
River Bed ◽  
The Amur River

Рассматривается преобразование гидрологического режима р. Амур, обусловленное глобальным потеплением климата в регионе. На основе проведенного в ИВЭП ДВО РАН анализа трендов температуры воздуха и количества атмосферных осадков на метеостанциях в разных частях бассейна Амура с длительными рядами наблюдений оценены темпы изменений основных метеорологических параметров. Установлено, что на климатические изменения наиболее заметно реагируют амплитуда максимальных годовых уровней воды, активность русловых процессов и смещение сроков ледовых явлений. Они происходят на фоне антропогенного воздействия, роль которого наиболее существенна на локальных участках. Показано, что изменение гидрологического режима в бассейне реки Амур увеличит риск опасных природных процессов в дальневосточном регионе.The transformation of hydrological regime of the Amur River caused by the global warming in the region is considered. Based on the conducted by the IWEP of FEB of RAS analysis of the air temperature and precipitation amount trends at the meteorological stations in different parts of the Amur River basin with longtime series of observations, the rates of changing the basic meteorological parameters were evaluated. It has been established that the amplitude of the maximum annual water levels, activity of the river bed evolution and drift of ice phenomena times react more noticeably to the climatic changes. They come against the background of the anthropogenic impact a role of which is most critical at the local sections. It was shown that a change in the hydrological regime in the Amur River basin will enhance a risk of the dangerous natural processes in the Far-Eastern region.

scholarly journals Natural and Anthropogenic Factors Impact on the Amur River Bed Passage Ability near Khabarovsk during floods passing

2020 ◽  
pp. 66-82
Author(s):  
Keyword(s):  
Water Level ◽  
Construction Cost ◽  
Anthropogenic Factors ◽  
Channel Processes ◽  
Amur River ◽  
Water Flows ◽  
River Bed ◽  
The Amur River ◽  
The Given ◽  
Natural And Anthropogenic Factors

The article discusses the range of the Amur River maximal annual levels and water flows near Khabarovsk over the whole period of observations (1896–2019), quantity of outstanding and catastrophic floods. In compliance with references, the articles considered the main characteristics forming the channel processes at the given reach of the river. We have estimated the natural and anthropogenic factors impact on the water flows and levels passage ability in case of catastrophic floods and increasing of the protective facilities’ construction cost due to the water level extreme increase caused by anthropogenic factors. We have proposed a method of the maximal water level forecasting near the Khabarovsk water hub.

scholarly journals Examination of the Long-term Dynamics and the Scheme of Super-longterm Forecast for Inundation on the Amur River

2014 ◽  
pp. 45-59
Author(s):  
Keyword(s):  
Amur River ◽  
Term Forecast ◽  
The Amur River ◽  
Cyclic Variations ◽  
Phase Amplitude

The inundation long-term dynamics structure was studies on the basis of many-year observations of the maximal annual levels and water fl ow on the Upper, Middle, and Lower Amur. Characteristics (period, phase, amplitude) of their cyclic variations have been revealed and the super-long-term forecast scheme has been suggested.

scholarly journals The Amur River Water During the Winter Low-water Period: The Many-year dynamics of the Sulfates Content and Runoff.

2020 ◽  
pp. 82-93
Author(s):  
Keyword(s):  
Power Plants ◽  
Hydroelectric Power ◽  
Amur Basin ◽  
Amur River ◽  
Economic Changes ◽  
Large Cities ◽  
The Amur River ◽  
The Many ◽  
The Impact

ulfates are the dominant ions among the major ones in the Amur region’s sewage. Therefore, the purpose of the research is to study the long-term dynamics of the content and runoff of sulfates in the Amur River in the winter low-water, based on the materials of Roshydromet for 1943-1976 and the author’s data for 1999-2019.Significant variations in the main areas were found due to both the diversity of natural conditions and anthropogenic influence in the areas of large cities and localities. The impact of the construction of hydroelectric power plants, significant economic changes in the Chinese part of the Amur basin, as well as the closure of pulp and paper and microbiological industries in the Russian part of the Amur basin on the long-term dynamics of the content and flow of sulfates is estimated. The maximum content of sulfates in the Amur River was observed after the accident at the Jilin chemical plant in China in December 2005. The influence of major floods on the increase in the flow of sulphates in the winter low-water was established.

scholarly journals An updated checklist of Chironomidae (Diptera) from the Amur River basin (Russian Far East)

2018 ◽  
Author(s):  
Nadezhda M. Yavorskaya ◽  
Marina A. Makarchenko ◽  
Oksana V. Orel ◽  
Eugenyi A. Makarchenko
Keyword(s):  
River Basin ◽  
Russian Far East ◽  
Far East ◽  
Valid Species ◽  
Amur River Basin ◽  
Term Study ◽  
Amur River ◽  
Long Term Study ◽  
The Amur River

A long-term study implemented in the Amur River basin enabled us to generate an updated checklist of 606 valid species in Chironomidae (Diptera) which are composed of 129 genera and six subfamilies, with 98 (17%) described new species belonging to 46 genera. Among the 98 recently described species, 46 ones (45%), were considered as possible endemics and sub-endemics. The numbers of species and genera by subfamilies is as follows: Podonominae (3 species; 3 genera), Tanypodinae (17; 9), Diamesinae (25; 11), Prodiamesinae (7; 3), Orthocladiinae (307; 57) and Chironominae (247; 46). The higher numbers of species (421 and 410, respectively) were recorded in the Lower and Middle parts of the Amur River basin, as compared with the Upper part of the basin. Most of the recorded chironomids (387 species, 67%) are Palaearctic in distribution, while others (191, 33%) are widely Holarctic. Species with Palaearctic distribution mostly have the following range types: East Palaearctic continental (23%); East Palaearctic continental-insular (20%); Palaearctic transpalaearctic (14%); Palaearctic amphi-Eurasian (10%).

Long-Term Land-Cover Change in the Amur River Basin

2014 ◽  
pp. 155-164
Author(s):  
Shigeko Haruyama ◽  
Yoshitaka Masuda ◽  
Akihiko Kondoh
Keyword(s):  
Land Cover ◽  
Land Cover Change ◽  
River Basin ◽  
Amur River Basin ◽  
Amur River ◽  
The Amur River

scholarly journals The Economy of Qualities in a Cross-Border Market: Shopping Tourism as a Performative Practice

2021 ◽  
Vol 20 (2) ◽  
pp. 200-223
Author(s):  
Tatiana Zhuravskaia ◽  
Natalia Ryzhova
Keyword(s):  
Twin Cities ◽  
Local Market ◽  
Chinese Market ◽  
Amur River ◽  
Cross Border ◽  
Social Time ◽  
The Amur River ◽  
Chinese Tourists ◽  
Theoretical Overview

The article discusses the performativity of shopping tourism on the Russian-Chinese border using the terminology of M. Callon’s and his co-authors’ economy of qualities. The 2014 crisis has changed the parity of the ruble and the yuan, and has also changed the vector of cross-border tourism in the opposite direction. The authors show how observation of the residents of Blagoveshchensk regarding the purchases of Chinese tourists performs the perception of their social time and sends them “into the past”. They compared their everyday “here and now” knowledge with the knowledge accumulated during the operation of the cross-border local market. The usage of the language of the economy of qualities allows for the expansion of the boundaries of this concept for another type of market, that of the buyer’s market. We also ask about the dynamics of power in the wake of the assertion about the nature of market dynamics. The article consists of three main sections. The first section is a theoretical overview of the use of the concept of performativity in tourism research and the choice of the descriptive language for this empirical case. In the second section, we describe the “Chinese market” and trade practices before the 2014 crisis. The third section contains a reflection on the post-crisis changes and the processes of (re)qualification of goods and themselves. Empirical materials were gathered by the authors in the course of long-term studies in the twin-cities of Blagoveshchensk and Heikhe located on two banks of the Amur River, mainly through observation and interviews.

scholarly journals Long-term dynamics and trend of ion sink of Amur river In the winter low-water period near Khabarovsk, Russia

2019 ◽  
Vol 46 (2) ◽  
pp. 225-231
Author(s):  
N. M. Shesterkina ◽  
V. P. Shesterkin
Keyword(s):  
Spatial Heterogeneity ◽  
Hydrochemical Characteristics ◽  
Amur River ◽  
Winter Runoff ◽  
Increasing Trend ◽  
The Amur River ◽  
Large Floods ◽  
Hydropower Construction

The long-term dynamics and trend of the ion sink of the Amur River near Khabarovsk, Russia, in the winter low-water period were studied. The hydrological and hydrochemical characteristics of the main tributaries are given. The spatial heterogeneity of the distribution of mineralization along the length and width of the Amur is noted. The influence of large floods on the winter runoff of solutes has been established. The long-term increasing trend of ion sink in the winter low-water period due to hydropower construction is shown.

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