Investigation of the nature of suspended matter under the influence of the facies-genetic characteristics of bottom sediments

The purpose of this study is to obtain a mathematical model to assess the influence of the facies and genetic characteristics of bottom sediments on the distribution of suspended matter during dredging.The addressed problem is associated with the detrimental effect of bottom sediments during hydraulic works on the ecological state of a water body. An increase in the level of technogenic turbidity leads to redistribution of the thermal conductivity of water masses and corresponding deterioration in the habitat of aquatic organisms. The development of a mathematical model for the distribution of suspended matter is an urgent task, the solution of which will allow us to analyze the area of distribution of each of the facies of bottom sediment during dredging operations.A mathematical model of the distribution of facies of suspended matter during dredging operations based on the finite difference method has been developed. Software for modeling and visual representation of the process of propagation of facies of suspended matter in the water space of the Gorin River during dredging operations has been developed using C# software, Visual Studio software development environment.The scientific novelty of the performed work is a qualitative and quantitative assessment of the distribution of suspended solids during dredging operations under conditions of hydrogeological uncertainty.

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Methodical Peculiarities of the Preparation of Samples of Suspended Matter and Bottom Sediments

Hydrobiological Journal ◽

10.1615/hydrobj.v52.i2.90 ◽

2016 ◽

Vol 52 (2) ◽

pp. 83-100 ◽

Cited By ~ 1

Author(s):

V. A. Zhezherya ◽

P. N. Linnik ◽

T. P. Zhezherya ◽

M. P. Skobley

Keyword(s):

Bottom Sediments ◽

Suspended Matter

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Methodology of Research in Micropollutants – Heavy Metals

Water Science & Technology ◽

10.2166/wst.1982.0037 ◽

1982 ◽

Vol 14 (12) ◽

pp. 107-125 ◽

Cited By ~ 15

Author(s):

Roland Wollast

Keyword(s):

Heavy Metals ◽

Mathematical Models ◽

Aqueous Phase ◽

Suspended Matter ◽

Solid Phase ◽

Aquatic Organisms ◽

Biological Processes ◽

Particulate Phase ◽

Sources Of Pollution ◽

Adsorption Desorption

A comparison of the concentration of dissolved and of particulate heavy metals in the aquatic system indicates that these elements are strongly enriched in the suspended matter. The transfer between the aqueous phase and the solid phase may be due to dissolution-precipitation reactions, adsorption-desorption processes or biological processes. When these processes are identified, it is further possible to develop mathematical models which describe the behaviour of these elements. The enrichment of heavy metals in the particulate phase suspended or deposited and in aquatic organisms constitutes a powerful tool in order to evaluate sources of pollution.

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THE FIRST DATA ON THE MEIOBENTHOS OF LAKE NERO

Transactions of Papanin Institute for Biology of Inland Waters RAS ◽

10.47021/0320-3557-2020-61-72 ◽

2020 ◽

pp. 61-72

Author(s):

V. Gusakov

Keyword(s):

Species Richness ◽

Aquatic Organisms ◽

Quantitative Structure ◽

Community Members ◽

Volga River ◽

Volga River Basin ◽

Qualitative And Quantitative ◽

First Results ◽

High Species Richness ◽

First Time

The paper provides the first results of a study of the qualitative and quantitative structure of the community of bottom meiofauna (meiobenthos) in shallow, hypereutrophic Lake Nero (Volga River basin, Yaroslavl region, Russia). In the samples, collected in early September 2017, 106 representatives from 16 systematic groups of aquatic organisms were found. About half of them had not been previously recorded in the lake's fauna. The species composition of Gastrotricha, Nematoda, Tardigrada, Acari, Harpacticoida, and Ostracoda was analyzed in the water body for the first time. It is established that at the end of the vegetation season, the lake's meiobenthos characterizes by relatively high species richness, diversity, and quantitative parameters. The circle of the main (dominant) community members in the studied period was outlined.

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РОЗРОБКА ІНСТРУМЕНТАЛЬНОГО МЕТОДУ ДОСЛІДЖЕННЯ ФАКТУРИ ТКАНИНИ

World Science ◽

10.31435/rsglobal_ws/31032020/6968 ◽

2020 ◽

Vol 1 (3(55)) ◽

pp. 17-25

Author(s):

Нода О. М. ◽

Закора О. В. ◽

Рязанова О. Ю.

Keyword(s):

Tissue Sample ◽

Objective Assessment ◽

Instrumental Method ◽

Structure And Properties ◽

Textile Production ◽

Qualitative And Quantitative ◽

Urgent Task ◽

Quantitative Characteristics ◽

Tactile Sensations ◽

Qualitative And Quantitative Characteristics

Modern consumers attach increasing importance to tactile sensations and the general perception of the surface of fabrics, therefore, the study of the structure and properties of woven textures is an urgent task of textile production. In textile technologies, organoleptic research methods are used mainly, which give a subjective visual and tactile assessment of the surface of the tissues. Therefore, there was a need to develop an instrumental method for determining the texture of fabrics, which was implemented on the basis of the existing method for studying the texture of hard surfaces. It is based on the idea of creating a constant mode of illumination of the object of observation, which is a tissue sample. The proposed method is based on the use of a special optical device for determining the qualitative and quantitative characteristics of textures and is a viewing chamber containing a mechanism for changing the lighting mode and a mechanism for capturing tissue images. For an objective assessment of the state of the surface of the tissues, the invoice indicator is calculated − the invoice coefficient. The implementation of the developed method allows to increase the efficiency of the processes of design-design of fabrics, to predict the appearance of fabrics and to ensure compliance with the texture of the fabric of the model of the garment.

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An Applied Mathematical Model for Business Transformation and Enterprise Architecture

Using Applied Mathematical Models for Business Transformation - Advances in Business Information Systems and Analytics ◽

10.4018/978-1-7998-1009-4.ch004 ◽

2020 ◽

pp. 103-130

Keyword(s):

Mathematical Model ◽

Enterprise Architecture ◽

Real Life ◽

Development Project ◽

Advanced Mathematics ◽

Development Environment ◽

Business Transformation ◽

Natural Language Programming ◽

High Level ◽

Transformation Processes

The HMM research and development project concept (RDPC) uses factor-driven research and reasoning concept that is supported by a behaviour-driven development environment or a natural language programming that can be easily adopted by any RDPC, where the HMM framework offers such a high level factors editing their logic implementation environment that it can be used by any RDPC researchers without any prior knowledge in computer sciences, technical, or even advanced mathematics. The RDPC is a meta-model that can be used for research topics on enterprise architecture, business transformation or decision-making systems, mathematical models-algorithms. It is supported by many real-life cases. The uniqueness of this RDPC also promotes the future transformation project's unbundling and the alignment of various enterprise resources including services, architecture standards, and strategies to support business transformation processes as the first.

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The study of the suitability for use in agriculture of sludge and hydrochemical indicators of water in the reservoirs of the fish farm LLC “Albashi”

E3S Web of Conferences ◽

10.1051/e3sconf/202017502001 ◽

2020 ◽

Vol 175 ◽

pp. 02001

Author(s):

Natalya Yurina ◽

Denis Yurin ◽

Irina Astakhova ◽

Tatyana Shcherbatova ◽

Igor Shcherbatov

Keyword(s):

Bottom Sediment ◽

Fresh Water ◽

Bottom Sediments ◽

Suspended Matter ◽

Agricultural Production ◽

Water Bodies ◽

Hydrochemical Regime ◽

Bottom Deposits ◽

Environmentally Safe ◽

Reservoir Type

The study of suitability for the use in agriculture of sludge deposits and hydrochemical indices of water bodies of fish-growing enterprise of LLC “Albashi” were carried out. It is an enterprise engaged in breeding and growing pond fish and sturgeon in pools and gardens, crayfish, growing aquapon greens. Fresh water bodies of reservoir type LLC “Albashi” contain a large number of bottom deposits. The layer of sludge deposits on the bottom in places reaches the power of 2-5 meters, and the underground power is difficult. Bottom sediments were taken from a depth of 1.0-1.2 m from the surface. The hydrochemical regime of the studied water bodies fully corresponds to the cultivation of aquaculture objects and hydroponic plants. Sufficient suspended matter in water (8.2 mg/dm3). The complete absence of dichlorodiphenyl trichloroethane, its metabolites and pesticides characterizes the products produced as environmentally safe. Consequently, bottom sediment site under study can be considered suitable for agricultural production.

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STRESS CONCENTRATION DUE TO ADVANCING HEART PULSE THROUGH A BLOOD VESSEL JOINT

Journal of Mechanics in Medicine and Biology ◽

10.1142/s0219519401000106 ◽

2001 ◽

Vol 01 (02) ◽

pp. 79-96 ◽

Cited By ~ 1

Author(s):

IGOR SELEZOV ◽

OLGA AVRAMENKO ◽

GIUSEPPE FRATAMICO ◽

GIOVANNI PALLOTTI ◽

PAOLO PETTAZZONI

Keyword(s):

Mathematical Model ◽

Stress Concentration ◽

Blood Vessel ◽

Blood Vessels ◽

Vessel Wall ◽

Pulse Propagation ◽

Bending Moments ◽

Shear Forces ◽

Piecewise Constant ◽

Qualitative And Quantitative

The effect of a vessel joint of different properties on the heart pulse propagation and anastomosis junction is investigated. The system under consideration is modelled by an elastic piecewise-constant vessel consisting of two perfectly jointed vessels of different thicknesses and radii. A mathematical model is developed, to perform numerical calculations and to obtain some qualitative and quantitative estimations. The effect of different thicknesses and radii of jointed blood vessels on the concentrations of pressure, radial vessel wall displacement, bending moments and shear forces are analyzed in detail.

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