scholarly journals Features of the Oceanological Values Fields in the Sivash Bay (The Sea of Azov)

2020 ◽  
Vol 37 (6) ◽  
Author(s):  
P. D. Lomakin ◽  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Suspended Matter ◽  
Water Area ◽  
Total Suspended Matter ◽  
Western Coast ◽  
Colored Dissolved Organic Matter ◽  
Marine Hydrophysical Institute ◽  
The North ◽  
Azov Sea

Purpose. The study is aimed at revealing the structural regularities and variability of the fields of temperature, salinity, the colored dissolved organic matter and total suspended matter concentrations, and also the factors that form them in the Sivash Bay. Besides, the results obtained are to be compared with the already known features of the fields of the values under investigation which are typical of the Azov-Black Sea coastal zone; and the response in the considered fields to the North Crimean Canal damming is to be assessed. Methods and Results. Based on the data of 8 expeditions carried out by Marine Hydrophysical Institute in 2013–2016, the structural regularities and variability of the fields of temperature, salinity, the colored dissolved organic matter and total suspended matter concentrations, and the factors that form the fields of these values in the Sivash Bay were revealed. The quantitative indicators of changes in the fields of the considered values, which arose after the North Crimean Canal was dammed, are represented. Conclusions. In the region under study, a number of constantly acting factors that determine formation of special, not typical of the coastal area, features of the oceanological values fields are identified, namely: the influence of the Azov Sea and the North Crimean Canal waters, the rivers inflowing to the water area of the Sivash western coast, the isolated lakes, the swampy shallow bays and the isolated, relatively deep, parts of the coastline. Three years after the North Crimean Canal was dammed, in the northwestern Sivash salinity increased by 20 PSU. The opinion that Sivash is not a typical sea bay, but a connected with the Azov Sea reservoir with the signs of a salt swamp is confirmed

scholarly journals Hydrophysical research in the Kruglaya Bay (Sevastopol)

2021 ◽  
Author(s):  
A. A. Latushkin ◽  
A. I. Chepyzhenko ◽  
A. V. Prazukin ◽  
A. A. Chepyzhenko ◽  
Yu. K. Firsov ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Suspended Matter ◽  
Water Layer ◽  
Water Area ◽  
Matter Content ◽  
Total Suspended Matter ◽  
Dynamic Activity ◽  
Organic Matter Concentration ◽  
Matter Concentration

On the basis of two hydrophysical surveys (August 28 and November 14, 2019), the spatial distribution was investigated of temperature, salinity, total suspended matter, dissolved organic matter features, and total suspended matter dynamic activity in the waters of the Kruglaya Bay. The horizontal and vertical distributions of these characteristics were considered. The hydrophysical parameters were measured from a small vessel at anchored stations using Kondor Sounding Complex. The analysis of obtained distributions showed that less saline and more turbid waters were observed in the apex of the bay. The highest content of suspended particles and dissolved organic matter were detected in this water area. An almost uniform stratification of hydrological parameters and total suspended matter concentration were observed in the vertical distribution over the entire water area of the bay. In the vertical dissolved organic matter distribution, an increase under the water surface layer of ~ 1–5 m was observed both in August and in November. This layer was more pronounced in November. The total suspended matter content in the surface water layer in August 2019 was on average twice as high as in November of the same year, and the dissolved organic matter concentration was lower.

scholarly journals Control of the current system and fields of the total suspended matter concentration and dissolved organic matter concentration in lake Donuzlav in May 2019

2021 ◽  
pp. 87-94
Author(s):  
P.D. Lomakin ◽  
◽  
V.I. Ryabushko ◽  
A.I. Chepyzhenko ◽  
S.V. Schurov ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Suspended Matter ◽  
Local System ◽  
Total Suspended Matter ◽  
Household Waste ◽  
Sand Mining ◽  
Port Area ◽  
Matter Concentration ◽  
Matter Fields

Based on the results of the expedition carried out in May 2019 by the A. O. Kovalevsky Institute of Biology of the Southern Seas of RAS, data on the local system of currents and the structure of the content of the total suspended matter and dissolved organic matter fields in the waters of Donuzlav Lake are obtained. It is shown that the local system of currents in the upper layer of the lake waters is represented by two cyclonic eddy formations. At the bottom along the navigable canal, a pronounced current stream directed into the sea is noted. In the structure of the total suspended matter and dissolved organic matter fields, three anthropogenic maximums of concentration coinciding in location are found, which are located at the site of sand mining, in the area of the port and in the Shchelkunov Bay, where there is a household waste collector. In the structure of the field concentration of total suspended matter and dissolved organic matter, three sites of anthropogenic concentration maxima coinciding at the location are found. They are located on the sand mining site, in the port area and in the Shchelkunov Bay, where the household waste collector operates. Sand mining, port and household waste collector are the main sources of water pollution in Lake Donuzlav. In the area of the mussel-oyster farm, an increased concentration of dissolved organic matter is identified, as a likely consequence of the vital activity of mollusks concentrated here.

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