scholarly journals Seasonal and spatial variability of the ammonium nitrogen content in the Amur River near Khabarovsk in 2018–2019

2020 ◽  
Author(s):  
В.П. Шестеркин ◽  
Н.М. Шестеркина
Keyword(s):  
Winter Season ◽  
High Water ◽  
Ammonium Nitrogen ◽  
Ice Formation ◽  
Left Bank ◽  
Regulated Rivers ◽  
Amur River ◽  
Winter Runoff ◽  
The Amur River ◽  
The Right

Представлены результаты наблюдений за содержанием аммонийного азота в воде р. Амур у г. Хабаровск в 2018–2019 гг. Максимальные значения установлены в правобережной и средней части русла в 2018 г. в начале ледостава (0.37 мг N/дм3), в 2019 г. в конце ледостава (0.32 мг N/дм3). Наименьшие значения зимой отмечены в левобережной части русла Амура из-за влияния зарегулированных рек Зея и Бурея. Показано постепенное снижение концентрации аммонийного азота в течение зимнего периода в 1.5 раза в 2018 г. и возрастание в 2.4 раза в 2019 г. Выявлено снижение концентраций в зимнюю межень 2018–2019 гг. по сравнению с периодом 2011–2013 гг. в 1.9 раза, что свидетельствует об улучшении качества воды р. Сунгари, а соответственно и Среднего Амура. В период открытого русла содержание аммонийного азота по сравнению с зимней меженью ниже и не превышает 0.1 мг N/дм3. Наибольшие значения наблюдаются в правобережной и средней части русла во время половодья и на подъеме паводков, сформированных в бассейнах рек Уссури и Сунгари. Показано, что на гребне катастрофического паводка, сформированного в Забайкальском крае в 2018 г., и очень сильного паводка в 2019 г. содержание аммонийного азота не превышало 0.05 мг N/дм3. Установлено, что содержание аммонийного азота в левобережной части русла, а в межпаводочный период по всей ширине Амура находится ниже предела обнаружения. The results of observations over the content of ammonium nitrogen in the water of the Amur River near Khabarovsk in 2018–2019 are presented. The maximum values were determined in the right-bank and middle parts of the riverbed in 2018 at the beginning of ice formation (0.37 mg of N/dm3) and in 2019 at the end of ice formation (0.32 mg of N/dm3). The minimum values were observed in winter in the left-bank part of the Amur riverbed due to effect of the regulated rivers of Zeya and Bureya. The gradual decline in the concentration of ammonium nitrogen 1.5 times during the winter season of 2018 and growth 2.4 times in 2019 are shown. The decrease in concentrations 1.9 times during the winter runoff low of 2018–2019 in comparison with period of 2011–2013 was revealed which gives evidence of the water quality improvement in Sungari River and, respectively, in the middle reaches of Amur River. In the period of free channel, the content of ammonium nitrogen is lower in comparison with the same during winter low-water level and does exceed 0.1 mg of N/dm3. The maximum values are observed in the right-bank and middle parts of the riverbed during high water and on the rise of floods formed in the catchments of the Ussuri and Sungari Rivers. It was demonstrated that in the top of the catastrophic flood formed in the Trans-Baikal Territory in 2018 and very strong flood in 2019, the content of ammonium nitrogen did not exceed 0.05 mg of N/dm3. It has been established that the content of ammonium nitrogen in the left-bank part of riverbed and in the peak-flood interval across the whole width of the Amur River is below detection limit.

scholarly journals Ecological and chemical characteristics of small river Arguzikha (Zeya-Bureya plain, Russia)

2020 ◽  
Vol 203 ◽  
pp. 03001
Author(s):  
Antonina Pakusina ◽  
Tatyana Platonova
Keyword(s):  
Heavy Metals ◽  
River Water ◽  
Myriophyllum Spicatum ◽  
Ammonium Nitrogen ◽  
Left Bank ◽  
Amur River ◽  
High Oxygen Content ◽  
The Amur River ◽  
Toxic Concentrations ◽  
Water Bottom

The article considers the results of research from 2015 to 2019 on the study of hydrochemical indicators and the content of heavy metals in the ecosystem components of the small Arguzikha river , a left-Bank tributary of the Amur river (water, bottom sediments, macrophytes, birds ’ feathers). High oxygen content in the water (8.8-15.9 mgO2/dm3) and high BOD5 values (6-12 mgO2/dm3) in the middle and lower reaches of the Arguzikha river indicate the process of eutrophication. The value of permanganate oxidability (6.8-15.5 mgO/dm3) characterizes the high content of organic substances in water. In the spring, nitrate nitrogen (3.45-6.39 mgN-NO3-/dm3) was found in the water of the Arguzikha river, which had a pyrogenic origin. In the summer the rainy season was dominated by ammonium nitrogen (2.34 mgN-NН +/dm3). The high content of total phosphorus (0.337-0.609 mg/dm3) in the river water was in the spring. In the spring of 2015, the concentration of lead in the lower reaches of the river reached 6.36 µg/dm3, during the subsequent time, the lead content in the Arguzikha water was less than the MPC. Toxic concentrations of lead (> 30 mg / kg) and manganese (> 300 mg/kg) were found in macrophytes of Nymphoides peltata and Myriophyllum spicatum. In the feathers of waterfowl of the Arguzikha river the content of heavy metals decreases in a row Fe>Zn>Cu>Pb>Mn>Сг>Ni>Cо>Cd. The feathers of Anas acuta and Anas querquedula contained Pb 17.7 mg/kg and 22.2 mg/kg, Cd 0.15 mg/kg and 0.08 mg/kg, respectively.

scholarly journals Impact assessment of solid runoff on heavy metals migration during high floods on the Amur river

2021 ◽  
Vol 895 (1) ◽  
pp. 012025
Author(s):  
A N Makhinov ◽  
A F Makhinova ◽  
Sh Liu
Keyword(s):  
Molecular Mass ◽  
Chemical Interaction ◽  
Chemical Elements ◽  
Chemical Compounds ◽  
Left Bank ◽  
Amur River ◽  
Neutral Compounds ◽  
The Amur River ◽  
The Right

Abstract Inhomogeneity of the concentrations of chemical elements in the cross-section of the Amur River is considered as a function of the state of their soluble and suspended forms. Flooding of wetlands and urbanized areas contributes to the removal of pollutants into the river channel. The wide spread of fens on the left bank contributes to the concentration of organic matter along the left bank of the river. Terrigenous material mostly comes from the right bank, where agricultural fields are concentrated. The ratio of their concentrations is maintained by the duration of the flood. The mechanisms of redistribution of elements between their suspended and soluble forms have been studied. The mechanisms of sorption of chemical compounds on mineral and organic colloids are described. It was found that mineral colloids with a negative charge due to electrostatic attraction sorb electrically neutral compounds (hydroxoaqua complexes [Mn(OH)2(OH2]0, ammonia [Cu(NH3)4(OH)2]0. The role of organic material in the redistribution of chemical compounds between soluble and suspended forms is shown. Organic colloids with molecular mass > 5.0 kDa precipitate complex cations – [FeHSO4]+, [FeHSO4]2+, [CuHSO4]+. An organic substance with a molecular mass of <2.0 kDa has a greater complexing ability for Fe(2)3+, Cu2+, Zn2+, Mn2+ ions. They bind metals to organo-mineral complexes by chemical interaction and form mobile organo-mineral complexes and heteropolar salts.

scholarly journals Abundance and diversity of phytoplankton in the Paraná River (Argentina) 220 km downstream of the Yacyretá reservoir

2007 ◽  
Vol 67 (1) ◽  
pp. 53-63 ◽  
Author(s):  
Y. Zalocar de Domitrovic ◽  
ASG. Poi de Neiff ◽  
SL. Casco
Keyword(s):  
High Water ◽  
Paraná River ◽  
Cylindrospermopsis Raciborskii ◽  
Left Bank ◽  
Parana River ◽  
Paraguay River ◽  
Abundance And Diversity ◽  
Chemical Conditions ◽  
The Right ◽  
Physical And Chemical

Patterns in the temporal composition, abundance and diversity of the phytoplankton community of the Paraná river prior to and after the initial filling phase of the Yacyretá reservoir are analyzed. The study site is located 220 km downstream from the Yacyretá reservoir and 30 km downstream from the confluence with the Paraguay river. Because both rivers remain separate and unmixed at the study site, we compared the possible effects of the impoundment on both river banks (left and right banks) in hydrological periods with similar duration and magnitude of the low and high water phases. Physical and chemical conditions measured on the right bank (water from the Paraguay river) were similar at both periods (pre and post-impoundment) whereas conductivity, pH and orthophosphate concentration increased on the left bank (water from the High Paraná river and Yacyretá reservoir) after the impoundment. Changes in phytoplankton density and diversity were observed only in samples collected from water flowing from the reservoir (left bank). The density of Chlorophyceae (Chloromonas acidophila, Chlamydomonas leptobasis, Choricystis minor, Chlorella vulgaris, Scenedesmus ecornis, Monoraphidium minutum, M. contortum and M. pusillum) and Cryptophyceae (Rhodomonas minuta, Cryptomonas marssonii and C. ovata) increased while Cyanophyceae (Cylindrospermopsis raciborskii, Raphidiopsis mediterranea and Planktolyngbya subtilis) and Bacillariophyceae (Aulacoseira granulata and its bioforms) decreased compared to previous studies conducted on the left bank of the Paraná river. Phytoplankton collected from the right bank of the river did not differ in pre and post- impoundment samples because they originate from the Paraguay river, which remains relatively unaffected by human activities.

MODERN TRANSFORMATION OF SEASONAL RUNOFF DISTRIBUTION OF THE SIVERSKYI DONETS RIVER BASIN

2020 ◽  
pp. 48-58
Author(s):  
H.V. Bolbot ◽  
V. V. Grebin
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Mine Drainage ◽  
Annual Runoff ◽  
Donets Basin ◽  
Left Bank ◽  
Modern Period ◽  
Winter Runoff ◽  
Annual Runoff Distribution ◽  
The Right

The annual runoff distribution of the Siverskyi Donets River Basin in the period of modern climate change was estimated. The annual runoff distribution of the Siverskyi Donets Basin was researched for two characteristic periods (from the beginning of observations to 1988 and from 1989 to 2018). The assessment was performed for three water year types: wet year, average year and dry year. The research was performed for three groups of rivers depending on their affiliation to a particular part of the Basin. During the research, the average monthly runoff of the hydrological gauges, which we selected for the study were averaged. The annual runoff distribution was leveled in the current period. The Siverskyi Donets Basin is characterized by the peculiar physico-geographical conditions, so the annual runoff distribution is somewhat different for different part of the Basin. Differences in the annual runoff distribution of the right-bank tributaries, the left-bank tributaries and the Siverskyi Donets River were revealed. For the left-bank tributaries, which are less affected by anthropogenic load, climate change has led to a significant increase in runoff of the winter and summer-autumn low period. For the right-bank tributaries of the Siverskyi Donets, flowing within the industrial part of Donbas, the share of low period runoff has not changed, or even decreased. This is due to the reduction of mine drainage, due to the reduction of industrial production in the region. Instead, the share of autumn-winter period in the annual runoff has increased for the right-bank tributaries and the Siverskyi Donets River itself. It is established that the share of spring floods from the annual volume of runoff has significantly decreased and the share of the summer-autumn period for the rivers of the Siverskyi Donets Basin in the modern period has increased. The winter runoff of the left-bank tributaries of the modern period is characterized by an increase. The right-bank tributaries of the Basin are characterized by a decrease in winter runoff. Currently, in dry years, spring flood is practically not allocated on the annual hydrograph; the share of runoff in the limited months has significantly increased. At the present stage of climate change, the annual runoff distribution of the Siverskyi Donets River Basin has undergone significant changes.

scholarly journals The Timing of the Onset of Lows of the Summer-Autumn Low Water in the Basin of Upper Don

2019 ◽  
Author(s):  
Keyword(s):  
Water Content ◽  
Water Flow ◽  
River System ◽  
High Water ◽  
Left Bank ◽  
Absolute Minimum ◽  
Quality Of Water ◽  
Current Century ◽  
The Absolute ◽  
The Right

Considered the timing of the onset (with rounding up to a month) lows of the summer-autumn low water period in the basin of the Upper Don for the periods: from the beginning of the observations in the posts, before 1970, 1971-2000, 2001-2017. Three zones have been identified that differ in generation time of the absolute lows of water flow: the Don itself and the right-bank tributaries of the Don; the left-bank tributaries of the Don; a basin Hoper. It is established that in the current century the absolute minimums of water flow are formed in the selected zones in July – August, August-September, mainly in September, respectively, which is about a month earlier than the dates observed before 1970. The main shifts in the onset dates of the investigated characteristic occurred in 1971-2000, fixed in the current century. In the Hoper basin, there is greater consistency in the onset of absolute lows of water flow than in the river system of the Upper Don. Despite the increase in the duration of high water and summer-autumn low water, as well as the tendency of increasing water content in the period of low runoff, there is a movement of formation dates of low extrema of water content to the beginning of summer-autumn low water. The identified nature of the formation of absolute minimum is apparently the result of intra-annual redistribution of the flow and a response to the positive dynamics of air temperature, which directly or indirectly infruences the hydrological processes in the river catchment area. Earlier summer depletion of rivers can contribute to increased risks of water use during the summer-autumn low-water period, adversely affect the agricultural sectors focused on the use of water for agricultural water supply, significantly change the quality of water in water bodies and create environmental tensions in the basin.

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.

scholarly journals BASIS FOR SELECTION OF RIVERS FOR MONITORING ON THE STOCKS OF CHUM AND PINK SALMON IN THE AMUR RIVER

2019 ◽  
Vol 199 ◽  
pp. 19-34
Author(s):  
S. F. Zolotukhin
Keyword(s):  
20Th Century ◽  
River Basin ◽  
Chum Salmon ◽  
Pink Salmon ◽  
Species Number ◽  
Amur River Basin ◽  
Left Bank ◽  
Amur River ◽  
Spawning Grounds ◽  
The Amur River

The monitoring of chum and pink salmon escapement to spawning grounds in the Amur River basin was stopped in 2009. To start it again, a proved choice of the rivers is necessary for adequate controlling of these species number, by the spawning habitats of their population groups within the basin. For this purpose, results of the monitoring in 1949–2000 and the data on human settlements in the medieval times are analyzed. The lower reaches of the Amur were anciently inhabited by the paleoasiatic Nivkh people and the upper reaches where the fall chum spawned in spring waters were inhabited by the people of Pokrovskaya archeological culture — their burial grounds coincided with the spawning area of fall chum salmon. To reach these spawning grounds, fall chum salmon migrated up to the distance of 3427 km from the Amur mouth, but since the 20th century they occur rarely in the upper reaches of the Amur, in particular within Chinese territory where they are not observed in more than 50 years; recently they spawn in spring waters at the distance 500–1200 km from the Amur mouth, mainly in its right tributaries. The reproduction centers of other two populations of chum salmon, as the summer chum and fall chum breeding in hyporheic waters, are located in the Amgun River basin (the lower left tributary of the Amur). The fourth population is the lake chum salmon breeding in spring waters of Lake Chlya located on the left bank in the lower reaches of the Amur River. Centers of reproduction for both pink salmon populations, differentiated by even and odd years of spawning, are located in the Amgun River. Several test rivers are selected within all mentioned centers of reproduction, they are: Kerbi, Duki, Im, Somnya, Aksha, Khilka, Beshenaya, Gur, Anui, Khor, Kur, and Bira. This list is similar to the list of the rivers where chum and pink salmons were monitored in the 20th century

Study on the Rules of Sedimentation in Ningxia Shuidonggou Reservoir

2014 ◽  
Vol 1044-1045 ◽  
pp. 438-443
Author(s):  
Chun Guang Li ◽  
Cheng Yang
Keyword(s):  
Water Level ◽  
Recirculation Zone ◽  
Unstructured Grids ◽  
High Water ◽  
Left Bank ◽  
Governing Equations ◽  
Water Flow Velocity ◽  
The Right ◽  
Volume Method ◽  
North And South

In order to predict the sedimentation deposition in the Shuidonggou reservoir in next few years, the flow in this reservoir is studied using the two dimensional (2D) hydraulic mathematical model. The governing equations of the model are discredited with finite volume method (FVM) on unstructured grids, and the 2-D flow movement are simulated under several different conditions. The results showed that: when the amount of the water inflow and the water drawn unchanged, as the water level drops, water flow velocity increases in the reservoir; at high water level (1179 m), the left bank of the south side of the intake eroded; at low water level (1174.4m), north and south sides of the mainstream of water have a recirculation zone; when the water level is constant, with the increase of the amount of water, the recirculation zone on the right side of the intake became smaller and close to the water intake.

scholarly journals Boyar Gantimur from Bogdoy Khan: Birth and Debunk of a Myth

2020 ◽  
Vol 19 (8) ◽  
pp. 9-34
Author(s):  
Andrey S. Zuev
Keyword(s):  
Social Hierarchy ◽  
The State ◽  
Historical Research ◽  
Qing Empire ◽  
Ruling Elite ◽  
Amur River ◽  
The Amur River ◽  
State And Local ◽  
The Right

This article discusses the main facts about one of the leaders of the nomadic Ewenkis of Transbaikalia  Gantimur, who in 1666/67 left Qing empire and got through the process of naturalization in Russia. The author criticizes the narrative that is widespread in the state and local historical works and genealogical writings. According to it, Gantimur belonged to the Manchu ruling elite and allegedly participated in 1655 in the attack on the Russian Komarsky ostrog (fortress), located on the right bank of the Amur. Based on the analysis of a broad range of archival and published sources (petitions of Gantimur and his descendants, reports of Russian explorers and administrators, diplomatic documents drawn up during the Russian-Manchu negotiations) and historical research, it is shown, how this narrative appeared and became prevalent. The author proves that this historical myth does not correspond to real facts and was fabricated by the grandchildren of Gantimur in order to improve their status in the Russian social hierarchy and increase wealth. This article concludes by arguing that Gantimur was not part of the Manchu elite and did not take part in the Manchu campaigns on the Amur river.

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