scholarly journals Ecological-geographic aspects of water consumption and guard of waters in river basin of Luga in the Volyn area

2014 ◽  
pp. 210-216
Author(s):  
O. Perkhach ◽  
D. Rypych
Keyword(s):  
Key Words ◽  
River Basin ◽  
Water Consumption ◽  
Small Rivers ◽  
The South ◽  
South West ◽  
Basin Water

The concept of small rivers and their natural, economic and ecologo-geographical contents is examined. The works of that kind problematic in this region are analyzed. The aspects of water consumption and guard of waters are investigated in a river basin of Luga, tributary of West Bug in the south-west Volyn area. Measures of effective guard and renovation of small rivers are offered. In text is placed the work out cartographical model. Key words: small rivers, river basin, water consumption, guard of waters.

Trend of stream temperature and its drivers over the past 55 years in a large European River basin

2021 ◽  
Author(s):  
Hanieh Seyedhashemi ◽  
Florentina Moatar ◽  
Jean-Philippe Vidal ◽  
Dominique Thiery ◽  
Céline Monteil ◽  
...  
Keyword(s):  
River Basin ◽  
Air Temperature ◽  
Cold Water ◽  
Stream Temperature ◽  
Small Rivers ◽  
The South ◽  
Massif Central ◽  
The Past ◽  
Temperature Trends

<p>Air temperature has been increasing all around the world over the past decades. Owing to its sensitivity to air temperature, it is consequently expected that stream temperature experiences an increase as well. However, due to paucity of long-term stream temperature data, assessments of the magnitude of such trends in relation with landscape and hydrological changes have remained scarce.</p><p>The present study used a physically-based thermal model (T-NET: Temperature-NETwork), coupled with a semi-distributed hydrological model (EROS) to reconstruct past daily stream temperatures and discharges at the scale of the Loire River basin in France (10<sup>5</sup> km<sup>2</sup> with 52278 reaches). The ability of both models to reconstruct long-term trends was assessed at 44 gauging stations and 11 stream temperature stations.  </p><p>T-NET simulations over the 1963-2017 period show that there has been a significant increasing trend in stream temperatures for at least 70% of reaches in all seasons (median=0.36 °C/decade). Significantly increasing trends are more prominent in spring (Mar-May) and summer (Jun-Aug) with a median increase of 0.37 °C (0.11 to 0.8°C) and 0.42°C (0.14 to 1 °C) per decade, respectively. For 81 % of reaches, annual stream temperature trends are greater than annual air temperature trends (median ratio=1.21; interquartile ranges: 1.06-1.44). Greater increases in stream temperature in spring and summer are found in the south of the basin, mostly in the Massif Central (up to 1°C/decade) where greater increase in air temperature (up to 0.67 °C/decade) and greater decrease in discharge (up to -16%/decade) occur jointly. The increase of stream temperature is also higher in large rivers compared to small rivers where riparian vegetation shading mitigate the increase in temperature. For the majority of reaches, changes in stream temperature, air temperature, and discharge significantly intensified in the late 1980s.</p><p>These climate-induced changes in the annual and seasonal stream temperature could help us to explain shifts in the phenology and geographical distribution of cold-water fish especially in the south of the basin where trends are more pronounced.</p>

Water resources and environmental change in a Mediterranean environment: The south-west sector of the Duero river basin (Spain)

2008 ◽  
Vol 351 (1-2) ◽  
pp. 126-138 ◽  
Author(s):  
Antonio Ceballos-Barbancho ◽  
Enrique Morán-Tejeda ◽  
Miguel Ángel Luengo-Ugidos ◽  
José Manuel Llorente-Pinto
Keyword(s):  
Water Resources ◽  
Environmental Change ◽  
River Basin ◽  
Mediterranean Environment ◽  
The South ◽  
South West

scholarly journals ANÁLISE DO USO DA TERRA, DA COBERTURA VEGETAL E DA MORFOMETRIA DA BACIA DO RIBEIRÃO DOURADINHO, NO SUDOESTE DE GOIÁS, BRASIL

2019 ◽  
Vol 12 (3) ◽  
pp. 1093
Author(s):  
Wellmo Dos Santos Alves ◽  
Alécio Perini Martins ◽  
Davi Santiago Aquino ◽  
Wilker Alves Morais ◽  
Maria Antonia Balbino Pereira ◽  
...  
Keyword(s):  
Land Use ◽  
River Basin ◽  
Vegetation Coverage ◽  
The South ◽  
Geometric Characteristics ◽  
Annual Crops ◽  
South West ◽  
Pasture Area ◽  
Poor Drainage

Este trabalho objetivou analisar o uso da terra, a cobertura vegetal e a morfometria da bacia do Ribeirão Douradinho, no sudoeste de Goiás, usando geotecnologias. O uso da terra e a cobertura vegetal foram analisados para o ano de 2016, enquanto a morfometria da bacia foi estudada quanto às suas características geométricas, de relevo e de drenagem.  Na bacia, com extensão total de 149,35 km², predomina área de culturas anuais (72,57%), seguida pela área de pastagem (13,10%), Cerrado/matas (10,57%) e outros usos (3,76%). Foram observadas irregularidades ambientais dentro de áreas de preservação permanente, onde estas, em diversos pontos, estão cobertas por vegetação agrícola e pastagem. A área de estudo possui geometria com pouca propensão a enchentes, mas drenagem pobre. Seu relevo é propício à atividade agropecuária, que deve ser executada em consonância com práticas conservacionistas e com fiscalização mais intensa pelos órgãos responsáveis pela aplicação da legislação ambiental vigente.  An analysis of the land use, vegetation coverage and morphometry of Ribeirão Douradinho river basin, in the south-west of Goiás state, Brazil A B S T R A C TThis paper aimed analyzing the land use, the vegetation coverage and the morphometry of Ribeirão Douradinho river basin, in the south-west of Goiás state, using geotechnologies. The land use and vegetation coverage were analyzed for the year of 2016, while the morphometry of the basin was studied regarding its geometric characteristics, relief and drainage. In the basin, with a total extension of 149.35 km²m, predominates an area of annual crops (72.57%), followed by a pasture area (13.10%), Cerrado/woods (10.57%) and other uses (3.76%). Environmental irregularities were observed within the areas of permanent preservation, which, in several points, are coverage by agricultural vegetation and pasture. The studied area has geometry with low propensity to floods, but poor drainage. Its relief is propitious to farming, which must be accomplished in line with conservationist practices and with more intense supervision by the responsible organizations responsible for the implementation of the current environmental legislation.Keywords: river basin, geotechnologies, morphometric indexes, land use.

The main principles and results of pollution monitoring of sediments in the river basin

2020 ◽  
pp. 14-20
Author(s):  
B. Korzhenevsky ◽  
Gleb Tolkachev ◽  
Nikolay Kolomiycev
Keyword(s):  
Heavy Metals ◽  
River Basin ◽  
Water Exchange ◽  
Pollution Monitoring ◽  
Small Rivers ◽  
Volga River ◽  
Natural Landscape ◽  
Volga River Basin ◽  
Ivankovo Reservoir ◽  
Selection Of

The problems of modern geological ecology associated with the study of pollution of sediments of water bodies by heavy metals are considered. The Volga River basin is quite heterogeneous, both in geomorphological and hydrological terms, and in thechnogenical development and usage. A fourrank taxonomy is presented for the selection of sites for monitoring, based on a combination of natural, landscape, climatic and thechnogenical factors. To the largest – the highest taxon – sites of the Ist category – bowls of reservoirs with the slopes and the urban zones, industrial and agricultural structures located within them are carried. Within these areas are allocated to smaller taxa, areas category IInd are the industrial and urban zones, areas category IIIrd are the small rivers without significant contamination and areas category IVth to conduct special observations. The examples of special observations in the study of the annual migration of heavy metals in the system «bottom sediments – water column» on the Ivankovo reservoir are highlighted. The investigations were carried out under the conditions of the standard flow rate for this reservoir and in the conditions of slow water exchange.

Identification of sibling species in the genus Eucyclops from water-bodies of Ukraine and Russia using crossbreeding studies

2014 ◽  
Vol 25 (1-2) ◽  
pp. 61-68 ◽  
Author(s):  
V. I. Monchenko ◽  
L. P. Gaponova ◽  
V. R. Alekseev
Keyword(s):  
Cryptic Species ◽  
River Basin ◽  
Black Sea ◽  
Species Complex ◽  
River Basins ◽  
Water Bodies ◽  
Similar Species ◽  
Basin Water ◽  
Different Populations ◽  
Baltic Sea Basin

Crossbreeding experiments were used to estimate cryptic species in water bodies of Ukraine and Russia because the most useful criterion in species independence is reproductive isolation. The problem of cryptic species in the genus Eucyclops was examined using interpopulation crosses of populations collected from Baltic Sea basin (pond of Strelka river basin) and Black Sea basin (water-reservoires of Dnieper, Dniester and Danube rivers basins). The results of reciprocal crosses in Eucyclops serrulatus-group are shown that E. serrulatus from different populations but from water bodies belonging to the same river basin crossed each others successfully. The interpopulation crosses of E. serrulatus populations collected from different river basins (Dnipro, Danube and Dniester river basins) were sterile. In this group of experiments we assigned evidence of sterility to four categories: 1) incomplete copulation or absence of copulation; 2) nonviable eggs; 3) absence of egg membranes or egg sacs 4) empty egg membranes. These crossbreeding studies suggest the presence of cryptic species in the E. serrulatus inhabiting ecologically different populations in many parts of its range. The same crossbreeding experiments were carries out between Eucyclops serrulatus and morphological similar species – Eucyclops macruroides from Baltic and Black Sea basins. The reciprocal crossings between these two species were sterile. Thus taxonomic heterogeneity among species of genus Eucyclops lower in E. macruroides than in E. serrulatus. The interpopulation crosses of E. macruroides populations collected from distant part of range were fertile. These crossbreeding studies suggest that E. macruroides species complex was evaluated as more stable than E. serrulatus species complex.

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