scholarly journals On the unusual distribution of modified Amur River water in the Aniva Bay (Sakhalin) in November 2001

2021 ◽  
Vol 5 (2) ◽  
pp. 172-178
Author(s):  
G.V. Shevchenko ◽  
◽  
V.N. Chastikov ◽  
◽  
Keyword(s):  
River Water ◽  
River Runoff ◽  
Eastern Coast ◽  
Marine Biota ◽  
Amur River ◽  
Late Autumn ◽  
Unusual Distribution ◽  
Aniva Bay ◽  
The Amur River ◽  
Vast Area

In addition to the distribution of modified water of the Amur River runoff in the Aniva Bay, remote from its mouth, according to the data from 2012–2013 (Shevchenko G.V., Chastikov V.N. Distribution of the Amur waters in the eastern part of the Aniva Bay in late autumn. Meteorology and Hydrology, 2021, no. 1), the materials of the oceanological survey carried out in this basin in mid-November 2001 are presented. It is shown that desalinated water entered the bay in an unusually wide stream in the upper 30-meter layer and occupied a vast area, almost to the middle of the bay. At the same time, the differences in salinity with local waters were less than usual. The most probable reason for such specific features of oceanological conditions in 2001 was an increase (by about 30% in comparison with the usual values) of the wind of west-northwest rhumb of an offshore character. The obtained results show that the influence of this water can manifest itself not only near the eastern coast of the bay, as was demonstrated in the mentioned article, but also at a distance of more than 30 km from it. Accordingly, abrupt decreases in salinity can affect the marine biota not only of the coastal complex, but also inhabiting the central part of the bay.

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 Spatial and Seasonal Variability of the Middle Amur Water Chemical Composition

2012 ◽  
pp. 18-28
Author(s):  
Keyword(s):  
Chemical Composition ◽  
River Water ◽  
Economic Activity ◽  
Seasonal Variability ◽  
Matter Content ◽  
Amur River ◽  
Water Chemical Composition ◽  
Dissolved Matter ◽  
The Amur River

Spatial and seasonal variability of the middle Amur River water chemical composition has been discussed. The economic activity influence on the dissolved matter content has been shown. The Sungari River priority role in removal of nitrogen and phosphorous mineral forms to the Amur River has been stated.

Spreading of the Amur River Water in the Eastern Aniva Bay in Late Autumn

2021 ◽  
pp. 111-116
Author(s):  
G. V. Shevchenko ◽  
◽  
V. N. Chastikov ◽  
◽  
Keyword(s):  
Large Scale ◽  
River Flow ◽  
Aquatic Organisms ◽  
Late Autumn ◽  
Low Salinity ◽  
Aniva Bay ◽  
The Amur River ◽  
Salinity Water ◽  
Ecological Habitats

As a result of an analysis of the long-term average salinity distributions at four standard sections of the Aniva Bay, it was shown that in the late autumn (November-December) there was an inflow of modified Amur low-salinity water along its eastern shore. According to the results of two oceanographic surveys performed on October 29-31, 2013 and November 29-03, 2013, a large-scale desalination in the northeastern part of the bay occurred in conditions of extreme river flow, much earlier than usual, was revealed. A year earlier, instrumental measurements of temperature and salinity revealed the appearance of this water in the area (salinity decreased to 27.5 psu) at the beginning of December 2012 it retained its influence until mid-March 2013. The revealed feature makes it necessary to consider the ecological habitats of certain species of aquatic organisms in the area in a different way.

scholarly journals YEAR-TO-YEAR DYNAMICS OF THE ICE COVER ANOMALIES IN THE TATAR STRAIT FOR THE PERIOD FROM 1882 TO 2018

2019 ◽  
Vol 196 ◽  
pp. 114-122
Author(s):  
V. M. Pishchalnik ◽  
D. V. Dorofeeva ◽  
I. G. Minervin ◽  
I. V. Shumilov ◽  
I. V. Nikulina
Keyword(s):  
Time Series ◽  
River Runoff ◽  
Current Trend ◽  
Ice Cover ◽  
Interannual Variations ◽  
Okhotsk Sea ◽  
Amur River ◽  
Tatar Strait ◽  
The Amur River

Interannual variations of the ice cover in the Tatar Strait are analyzed for the period from 1882 to 2018 and compared with the ice cover dynamics in the Okhotsk Sea. Synchronicity of the ice cover long-term oscillations in these regions is noted for the periods of 1894–1920 and 1985–2009, but it is not statistically significant for the whole time series. Current trend to the ice cover decreasing began in the Tatar Strait 5 years later than in the Okhotsk Sea. Besides, the cases of extremely low ice cover were observed in the Tatar Strait along the whole period of observations, whereas were happened in the Okhotsk Sea only in the period of warming since 1990s. Possible influence of the Amur River runoff on the sea ice forming in the Tatar Strait is discussed.

The Amur River runoff formation in the Amur liman

2012 ◽  
Vol 37 (9) ◽  
pp. 631-639 ◽  
Author(s):  
E. V. Ivanova ◽  
V. V. Ivanov
Keyword(s):  
River Runoff ◽  
Amur River ◽  
Runoff Formation ◽  
The Amur River

New taxa in Festuca aggr. rubra (Poaceae) from the Baikal Siberia and the Russian Far East

2017 ◽  
Vol 48 ◽  
pp. 46-57
Author(s):  
I. V. Enushchenko ◽  
N. S. Probatova
Keyword(s):  
New Species ◽  
New Taxa ◽  
Nature Reserve ◽  
Russian Far East ◽  
Far East ◽  
Kamchatka Peninsula ◽  
Eastern Coast ◽  
Amur River ◽  
The Amur River ◽  
The Russian Far East

Three new taxa of red fescues (Festuca aggr. rubra L.) with entirely or partly pseudoviviparous spikelets are described from the Russian Far East (Yevreyskaya Avtonomnaya Oblast’, south of the Amur River) and from the Baikal Siberia (Irkutskaya Oblast’, Baikalo-Lenskii Nature Reserve): F. raddei Enustschenko et Prob., F. breviramea Enustschenko, F. rubrа L. var. caulispicula Enustschenko. In addition, a non-pseudoviviparous new species F. karaginensis Enustschenko et Prob. (also from Festuca aggr. rubra) is described from Karaginskii Island (near the eastern coast of Kamchatka Peninsula).

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