Anthropogenic Impact on Channel and Extra-Channel Geomorphology of the Dwarkeswar River Basin

2020 ◽  
pp. 297-330
Author(s):  
Sadhan Malik ◽  
Subodh Chandra Pal
Keyword(s):  
River Basin ◽  
Anthropogenic Impact

scholarly journals The Study of Condition of the South Bug River Basin with Using Geoecological Methods

2020 ◽  
Keyword(s):  
Surface Water ◽  
River Basin ◽  
Anthropogenic Impact ◽  
Surface Water Quality ◽  
Water Hardness ◽  
Farming System ◽  
Data Set ◽  
Normal Limits ◽  
Sampling Points ◽  
Transformation Methods

Purpose. Assess the current state of the Southern Bug River basin and the degree of anthropogenic impact on it (transformation) Methods. The methodology of complex field geographic research (according to S. Kurlov) was chosen for the research. On its basis, water samples were taken at the appropriate points of the river basin, which directly covered the Southern Bug River itself, as well as its tributaries, and the composition of coastal soils was analyzed. Laboratory experiments were performed on the basis of a licensed laboratory of the Uman National University of Horticulture Results. Based on the analysis of the data set of the main hydrochemical indicators of the surface water quality of the Southern Bug river basin and the analysis of the soil, it was found at some experimental points that the MPC content of the studied indicators was exceeded. The content is exceeded at all sampling points, due to the high content of complexes with humic acid salts, secondary waterlogging of reclaimed lands. The nitrite content is exceeded in the following places: r. Southern Bug (Vinnitsa and Ladyzhin), r. Ustya (Nemyriv), r. Udych litskiy district) and r. Dohna (Bershad district). The main reason for the intake of nitrates into the water is the washout of fertilizers from fields and vegetable gardens. All surface water bodies have increased water hardness, its acidity is within normal limits. The soils adjacent to the streams under consideration bear clear signs of hydrogenic accumulation of substances (carbonates, gypsum, salts) and deltaic conditions of formation (horizontal stratification, horizons buried, remnants of freshwater fauna). Conclusions. The concentration of pollutants increases with the approach of the tributaries of the Southern Bug River and the relief formed by them to their base of erosion. Excess concentrations of alkaline hydrolyzed nitrogen, as well as phosphorus and potassium compounds at the sampling points indicate a high level of intensity of the farming system, in which the use of agrochemicals is given priority. However, long-term ingress of these compounds into the water body will accelerate the process of eutrophication in the near future. The loss of humus in the soils of agricultural lands adjacent to the rivers Sob, Dokhna, Ustya was revealed. In general, the geosystem of the Southern Bug River suffers from a complex anthropogenic impact, the main source of which is agricultural production.

scholarly journals Evaluation of human pressure on the Rata river-basin system

2014 ◽  
pp. 164-170
Author(s):  
Liudmyla Kurhanevych ◽  
Lilianna Verbenets
Keyword(s):  
Land Use ◽  
Environmental Stress ◽  
Key Words ◽  
River Basin ◽  
Environmental Sustainability ◽  
Anthropogenic Impact ◽  
Anthropogenic Load ◽  
Environmental Research ◽  
Human Pressure ◽  
Basin System

The urgency of geo-environmental research of river systems status through the analysis of anthropogenic load on their pools has been substantiated. The main approaches to the assessment of anthropogenic impact on the river basin system and the structure of land use have been analyzed, the degree of environmental sustainability of landscapes, ecological balance area environmental sustainability of land use, and environmental stress within the Rata basin have been assessed. Key words: river-basin system, human pressure, land use and environmental sustainability

scholarly journals Environmental issues in sustainable use of water from minor and medium rivers in the Yenisei River Basin District

2020 ◽  
Vol 163 ◽  
pp. 03007
Author(s):  
Evgeniia Kolesnikova
Keyword(s):  
River Basin ◽  
Water Intake ◽  
Anthropogenic Impact ◽  
River Flow ◽  
Sustainable Use ◽  
Resource Depletion ◽  
Yenisei River ◽  
River Basin District ◽  
Russian North ◽  
The Yenisei River

Minor and medium rivers of the Russian North regions are vulnerable to anthropogenic impact. The article deals with the water use problems in the Yenisei River Basin where about 90% of the rivers used for water supply are minor and medium. Aassessment of the main sources of anthropogenic impact at the rivers of the region is given. The article substantiates the main problems in sustainable use of water in the Yenisei River Basin, such as water pollution, regulation of river flow and water resource depletion. The methods of estimation of acceptable water intake are analyzed, empirical and analytical probability curves of water intake values for each season for eleven rivers are built. Environmental flow for eleven rivers, as the average month and average annual values, are calculated.

scholarly journals TEORETHICAL EVALUATION OF ANTHROPOGENIC RISKS IN TAZLAU RIVER BASIN

2017 ◽  
Vol 22 (2) ◽  
Author(s):  
LUMINITA BIBIRE ◽  
MIHAELA-BEATRICE BARBIERU ◽  
NARCIS BARSAN ◽  
ADRIAN STELIAN GHENADI
Keyword(s):  
Risk Factors ◽  
River Basin ◽  
Anthropogenic Impact ◽  
Frequent Occurrence ◽  
Anthropogenic Risks ◽  
Water Vegetation

<p>In the Tazlau Basin there was a really strong anthropogenic impact. Many areas have almost totally been deforested, the grazing and agriculture have extensively and irrational been practiced, underground reserves have been exploited, too etc. The expanding of settlements along the rivers and building of modern communication routes along beds favored the phenomena of flooding and destruction of hydraulic works. These all aspects led to frequent occurrence of risk events: erosions, landslides, degradation of the rivers beds, pollution of air, water, vegetation, soil, etc. The paper identifies anthropogenic risk factors from Tazlau Basin, and proposes analyzes of the consequences and the measures to avoid these ensuing consequences.</p>

scholarly journals Longitudinal Distribution of Ephemeroptera Communities for the Sasar River and its

2012 ◽  
Vol 69 (2) ◽  
Author(s):  
Oana MARE ROȘCA ◽  
Lucia MIHALESCU ◽  
Zorica VOSGAN ◽  
Monica MARIAN ◽  
Anca DUMUÅ¢A ◽  
...  
Keyword(s):  
River Basin ◽  
Environmental Conditions ◽  
Anthropogenic Impact ◽  
Longitudinal Distribution ◽  
Sensitive Species ◽  
Biological Index ◽  
High Frequencies ◽  
Number Of Species ◽  
Baia Mare

The Sasar River basin is located in the Baia Mare Depression; it covers an area of 311 sq km and it is located in NW Romania. Due to urbanization and industrialization, and to a lesser extent agriculture, Sasar Basin shows a simplification of the biocenosis, more or less brutal, the intensity of pollution.This paper summarizes the results of sampling campaigns that were carried out between 2003-2008, when a total of 10 stations of the investigated basin were identified and analyzed, according to the Normalized Global Biological Index (IBGN) methodology. Subsequent to the systematical study, 20 species belonging to 6 Ephemeroptera families ( Leptophlebiidae, Ephemeridae, Ephemerelllidae, Caenidae, Heptageniidae, Bäetidae  ) were identified. Ephemeroptera is a group of demanding environmental conditions; high specific abundance was recorded in the stations located in areas with minimal and moderate anthropogenic impact (upstream Blidari-10 species; Valley Măriuţii- 10 species, upastream Baia Sprie - 9 species). The number of species is drastically reduced for the stations located downstream of the Baia Sprie and Baia Mare industrial centers (downstream Baia Sprie-3 species, downstream Baia Mare -1 species). Within the communities of Ephemeroptera high frequencies were performed by Bäetis rhodani (90%), considered in terms of the ecological valence, average tolerance to pollution. Pollution-sensitive species had low frequencies: Rhithrogena semicolorata  (40%), Bäetis alpinus (40%).

scholarly journals Assessment of the state of soils of uncultivated agricultural lands by indicators of enzymatic activity, humus and heavy metals

2021 ◽  
Vol 54 (2) ◽  
pp. 106-111
Author(s):  
Natalya V. Mishchenko ◽  
Ivan N. Kurochkin ◽  
Natalya V. Chugay ◽  
Ekaterina Yu. Kulagina
Keyword(s):  
Heavy Metals ◽  
Enzymatic Activity ◽  
River Basin ◽  
Soil Enzymes ◽  
Anthropogenic Impact ◽  
Field Research ◽  
Soil Samples ◽  
High Concentration ◽  
Vladimir Region ◽  
Agricultural Use

Abstract. Studies were conducted to determine such indicators as humus, heavy metals, and enzymatic activity in the soils of uncultivated farmlands of the Vladimir region located in the Klyazma river basin. In the course of field research in 2018, soil samples were selected at 13 points representing various landscape areas belonging to the Klyazma river basin. According to the results of research, a positive relationship between the activity of soil enzymes and the content of humus was established. In the soils of uncultivated farmland, where there is a high concentration of soil enzymes, a high percentage of humus was found from 2.88% to 3.96%. The dependence between the indicators of activity of soil enzymes and anthropogenic impact was revealed. Thus, the transition from deposits to the meadow, i.e. reduce anthropogenic impact on the soil, there is a sharp increase in the activity of soil invertase, catalase and dehydrogenase, an active process of humification of soil. The detected concentrations of heavy metals in soil samples of uncultivated farmland do not exceed the standards set for the approximate permissible concentrations, but their quantitative content has increased significantly over the past decade, their accumulation occurs and there is a potential danger in the case of secondary input of these soils into agricultural use.

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