scholarly journals Complex automated monitoring of the hydrological and hydrobiological state of basinal freshwater lake Krasilovskoye (Altai Region)

2021 ◽  
Author(s):  
I.A. Sutorikhin ◽  
S.Yu. Samoilova
Keyword(s):  
Surface Layer ◽  
Lake Level ◽  
Water Area ◽  
Freshwater Lake ◽  
Automated Monitoring ◽  
Altai Region ◽  
Different Seasons ◽  
Different Depths ◽  
Main Factors ◽  
Hydrometeorological Conditions

The results of a comprehensive automated monitoring for the hydrological and hydrobiological state of a freshwater Lake Krasilovskoe, conducted since 2013 are given. The experimental dashboard is considered, including the atmospheric-soil measuring complex (ASMC), developed and created in the IMCES SB RAS, Tomsk. An analysis of the dynamics of the lake level during years with contrasting hydrometeorological conditions was performed, which made it possible to identify the main factors that determine the level mode in the spring. In the hydrobiological terms, the dynamics of phytoplankton concentration at different depths in different seasons of the year were investigated. The results of processing Sentinel-1, 2 satellite data and data of natural observations on the distribution of chlorophyll “A” in the surface layer of water sections of the lake water area are discussed.

The Characteristic and Mechanism of Lead Pollution in Soil Profiles from a Sulphuric Acid Slag Pile Sit in Guangdong,China

2011 ◽  
Vol 474-476 ◽  
pp. 172-177 ◽  
Author(s):  
Jing Yong Liu ◽  
Xun An Ning
Keyword(s):  
Organic Matter ◽  
Surface Layer ◽  
Sulfuric Acid ◽  
Guangdong Province ◽  
Soil Samples ◽  
Soil Profiles ◽  
Lead Pollution ◽  
Acid Plant ◽  
Sulfuric Acid Plant ◽  
Main Factors

The soil samples in a profile were collected around the pyrite slag pile site near a sulfuric acid plant in Guangdong province and the contents of lead were investigated detail. At the same time, the mechanism of lead pollution was principium analyzed. The research found that the lead pollutants were mainly concentrated in soils surface layer about 0-10cm and shown characteristics of contents rapidly decreasing along the uprights. the main factors that affected the transference of lead from the slag to the soil were the filtering by acid rain and itself acidification of the slag. Iron oxide colloid and organic matter may have been responsible for the lead retention in soil.<b></b>

Hydrometeorological Conditions in the Southern Part of the Kerch Strait and the Pre-Strait Zone of the Black Sea as a Potential Area for Industrial Shellfish Cultivation

2020 ◽  
pp. 112-117
Author(s):  
Natalya A. Sytnik
Keyword(s):  
Black Sea ◽  
Bottom Layer ◽  
Water Area ◽  
The Black Sea ◽  
Frequent Change ◽  
Trophic Conditions ◽  
Kerch Strait ◽  
Sea Currents ◽  
Summer Minimum ◽  
Hydrometeorological Conditions

Considered materials on the hydrometeorological conditions of the Kerch Strait and the Black Sea. The data on the wind regime in the study areas are presented. The materials on currents and water exchange in the southern part of the Kerch Strait and the Black Sea waters are presented. The average monthly, annual, minimum and maximum values of air temperature at the coastal hydrometeorological stations are analyzed. In the seasonal course of salinity, in contrast to the regularities in the sea zone (in the surface and bottom layers), there is no summer minimum in the bottom layer of the strait. This indicates the development of coastal upwellings in the Black Sea in the summer, which facilitates the penetration of the Black Sea waters into the strait in the bottom layer. The oxygen saturation of the waters in the strait (both in the surface and in the bottom layers) is higher than in the sea area. This indicates a more intensive course of production processes. The stable Azov currents are most favorable for the plantations located in the strait near the Crimean coast during the collection of larvae on the collector and for the improvement of trophic conditions in the plantation areas. For the purification of coastal waters from suspended matter, the Black Sea currents are preferred. The frequent change of the Azov and Black Sea currents creates favorable conditions for the effective operation of mariculture farms. On the basis of the studies carried out, conclusions were drawn about the possibility of industrial cultivation of mollusks in the water area of the Kerch Strait and the Black Sea.

scholarly journals Improvement Of Tools Durability By Application Of Hybrid Layer Of Nitrided/PECVD Coating.

2015 ◽  
Vol 60 (3) ◽  
pp. 1609-1616 ◽  
Author(s):  
Z. Gronostajski ◽  
M. Kaszuba ◽  
H. Paschke ◽  
T. Zakrzewski ◽  
G. Rogaliński
Keyword(s):  
Surface Layer ◽  
Constant Velocity ◽  
Hot Forging ◽  
Hybrid Technique ◽  
Hybrid Layer ◽  
Mechanical Loads ◽  
Main Factors ◽  
Warm Forging ◽  
Thermal Shocks ◽  
Better Than

Abstract In the process of die hot forging the tools are subjected to three main factors leading to their destruction: the intensive thermal shocks, cyclically variable mechanical loads and intensive friction. The above mentioned factors causing destruction in the process of hot forging and warm forging concern mainly the surface of tools. Hybrid technique nitrided/PECVD belong to the latest methods of modifying the properties of the surface layer. In the paper the application of this technique for forging tools of constant velocity joint body is presented. The durability of the new tools is much better than the tools applied so far.

scholarly journals Composition analysis of phytoplankton microalgae in various water areas of the Black sea near the Crimean peninsula

2020 ◽  
pp. 93-100
Author(s):  
N.A. Andreeva ◽  
◽  
E.A. Grebneva ◽  
Keyword(s):  
Black Sea ◽  
Coastal Waters ◽  
Water Area ◽  
The Black Sea ◽  
Composition Analysis ◽  
Active Growth ◽  
Crimean Peninsula ◽  
Sevastopol Bay ◽  
Different Seasons ◽  
The Crimean Peninsula

Preliminary studies of cultivated phytoplankton microalgae were carried out in water samples collected during four expeditions at oceanographic stations of the coastal waters of the northwestern and northeastern parts of the Black Sea in different seasons of 2019-2020. Some features of the development of the algological component in conditions of changing oceanological characteristics of the environment have been established. In spring, the most active growth of diatoms was revealed in the area from Balaklava to the water area of the Sevastopol Bay.

The analysis of methods for measurement of methane oxidation in landfills

2003 ◽  
Vol 48 (4) ◽  
pp. 45-52 ◽  
Author(s):  
A. Nozhevnikova ◽  
M. Glagolev ◽  
V. Nekrasova ◽  
J. Einola ◽  
K. Sormunen ◽  
...  
Keyword(s):  
Methane Oxidation ◽  
Atmospheric Methane ◽  
Oxidation Activity ◽  
13C Isotope ◽  
Microbiological Methods ◽  
In Situ Conditions ◽  
Different Seasons ◽  
Minimal Deviation ◽  
Different Depths

Landfills and dumps are important sources of atmospheric methane. There is no generally accepted estimate of the influence of methane oxidation on landfill methane emissions. The present work aimed to analyse different methods for the investigation of methane emission and oxidation in methane-producing environments (wetlands, landfills, sludge checks), and to develop the precise procedure for the landfills. The combination of geochemical and microbiological methods to estimate and monitor the oxidation and emission of methane in landfills during different seasons is proposed. It includes the measurements, both on the surface and at different depths (up to 1 m) of landfill ground of the following parameters: (1) concentrations of methane, carbon dioxide and oxygen; (2) quantity of 13C isotope in gas samples; (3) methane-oxidation activity of landfill grounds assayed with two different methods: (a) in conditions of no moisture or substrate limitations, and (b) in conditions with a minimal deviation to in situ conditions; (4) the density of methanotrophic microbial population.

scholarly journals INFLUENCE OF THE HYDROMETEOROLOGICAL MODE IN THE PORT OF CHORNOMORSK ON THE SAFETY OF NAVIGATION

2020 ◽  
Vol 30 (1) ◽  
pp. 124-134
Author(s):  
I.L. Surinov ◽  
◽  
◽  
◽  
Keyword(s):  
Weather Conditions ◽  
Water Area ◽  
Climatic Conditions ◽  
The State ◽  
Entry And Exit ◽  
The Past ◽  
Port Operations ◽  
Production Activity ◽  
Meteorological Observations ◽  
Hydrometeorological Conditions

The paper analyzes hydrometeorological phenomena in the port of Chornomorsk. Changes in climatic conditions over the past 5 years have been identified. The most dangerous directions and speeds of winds, waves, which affect the operation of the port, have been determined. Analyzed the precipitation and the frequency of occurrence of various meteorological phenomena (thunderstorms, fogs, blizzards) in recent years. Conclusions were made on the unfavorable conditions of the port. Ensuring the safety of navigation during entry and exit from the port is one of the most pressing problems. Analysis of hydrometeorological conditions helps to reduce the number of accidents that occur due to ships grounding and bulkheads on the berth. Knowing the weather conditions in the port water area, you can ensure the safety of navigation. To compile a statistical analysis of the hydrometeorological characteristics in the port, a study of the logs of meteorological observations for every day over the past 10 years, as well as the cadastres of the seaports of Ukraine was carried out. The result of this analysis is the receipt of unfavorable factors that hinder the operation of the port in normal mode. It was also possible to establish the most unfavorable phenomena that limited the possibility of entering and leaving the port, as well as the months in which these phenomena are possible. Analysis of the parameters of the hydrometeorological situation allows us to conclude that the industrial activity of the port largely depends on the state of the weather and the sea. unfavorable meteorological phenomena reduce the efficiency of work and can pose a threat to the safety of their conduct. Various weather and sea phenomena affect port operations in different ways. The production activity of the port is largely dependent on the state of the weather and the sea, since unfavorable meteorological phenomena reduce the efficiency of work and can threaten the safety of their work. Various weather and sea phenomena affect port operations in different ways.

scholarly journals Variability of thermohaline regime of see water of the Gulf of Mexico in 2005-2017

2021 ◽  
pp. 65-76
Author(s):  
Yu. El Hadri ◽  
N. A. Berlinsky ◽  
D. Yu. Volkov ◽  
M. О. Slizhe
Keyword(s):  
Gulf Of Mexico ◽  
Water Temperature ◽  
Mississippi River ◽  
Thermal State ◽  
The United States ◽  
Water Area ◽  
Environmental Stability ◽  
Goods And Services ◽  
Different Depths ◽  
Annual Water

The Gulf of Mexico is a large, productive, marine and coastal ecosystem providing the coastal residents and neighbouring regions with goods and services. The Gulf of Mexico's water area plays a significant role in shaping the climate across the coastal zone and the thermal state of the region's water also has a major impact on development of atmospheric processes over the Atlantic and Europe. Long-term climate variability throughout the Gulf of Mexico may affect both the strength of the Gulf Stream and heat transfer patterns within the ocean and the economic activity and environmental stability of the entire Northwest Atlantic Region. This work aims at determining the characteristics of variability of temperature regime and salinity of the Gulf of Mexico over recent decades. The study was conducted based on the Gulf of Mexico Regional Climatology (GOM RC) data, version 2, available at the website of the NOAA's National Centers for Environmental Information (NCEI). It analyzes the temperature and salinity values at different depths for the period of 2005-2017. According to the analysis, over 2005-2017 the spatial distribution of the average annual water temperature on the Gulf of Mexico's surface demonstrates its decrease from south to north. Its highest value is observed next to the northwestern coast of Cuba and along the coastal area of the Bay of Campeche, and the lowest temperature is observed at Apalachee Bay located in the northeastern part of the Gulf of Mexico. Though significant horizontal temperature gradients are observed in winter, during the warm period the temperature field is more homogeneous. The minimum average monthly water temperature on the surface is observed in January, the maximum one – in September. The most distinct seasonal changes in temperature are observed in the water of the northern part of the Gulf of Mexico next to the United States' coast. The distribution of average annual salinity of the most of the Gulf of Mexico is homogeneous with the exception of its northern part, especially in the area where the Mississippi River water flows into it, where salinity decreases sharply. Graphs of water temperature and salinity distribution at different depths across different areas of the gulf were constructed in order to determine the water stratification.

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