scholarly journals Assessment of the state of water quality of the Dzierzgoń Lake using chemical and biological indicators

2012 ◽  
Vol 44 (2) ◽  
Author(s):  
Magdalena Frąk ◽  
Anna Baryła
Keyword(s):  
Water Quality ◽  
Biological Indicators ◽  
The State ◽  
State Of Water

PROBLEMS OF WATER SUPPLY IN THE TERRITORY OF THE OREL REGION AND WAYS TO SOLVE IT

2021 ◽  
Author(s):  
Павел Алексеевич Лапин ◽  
Сергей Александрович Копылов ◽  
Дмитрий Васильевич Елисеев
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
The State ◽  
Quality Of Water ◽  
The City

В статье анализируется состояние водного фонда в области и обеспеченность жителей региона водой. Рассматриваются основные проблемы неудовлетворительного качества воды в районах области и в г. Орле. Предлагается комплекс мероприятий с целью повышение качества водоснабжения на территории Орловской области путём строительства пяти объектов водоснабжения. The article analyzes the state of the water fund in the region and the provision of water to the residents of the region. The main problems of unsatisfactory water quality in the districts of the region and in the city of Orel are considered. A set of measures is proposed to improve the quality of water supply in the territory of the Orel region through the construction of five water supply facilities.

Modeling of eutrophication and strategies for improvement of water quality in reservoirs

2016 ◽  
Vol 74 (6) ◽  
pp. 1376-1385 ◽  
Author(s):  
Mojtaba Shourian ◽  
Ali Moridi ◽  
Mohammad Kaveh
Keyword(s):  
Water Quality ◽  
Thermal Regime ◽  
Thermal Stratification ◽  
Present Situation ◽  
The State ◽  
Nitrogen Loads ◽  
Quality Of Water ◽  
Pollution Loads

The purpose of this study is to survey the thermal regime and eutrophication states in Ilam reservoir in Iran as the case study. For this purpose and to find solutions for improving the water's quality in the reservoir, two general strategies for reducing the entering pollution loads and water depletions from the reservoir's outlets were analyzed by use of the CE-QUAL-W2 model. Results of the simulation of the present situation show the existence of thermal stratification during summer, which results in the qualitative stratification in the reservoir. According to the qualitative criteria, the Ilam reservoir's state is between mesotrophic and eutrophic. Results of the scenarios of reduction of the nutrients show that in the scenario of 50% reduction of the phosphorus and nitrogen loads into the reservoir, the state of the reservoir would recover from eutrophic to semi-eutrophic. Also, release of water from the reservoir during September, October and November would cause the restoration of the quality of water in the reservoir. To avoid the occurrence of critical eutrophication in the reservoir, reducing the ponding time in the reservoir by fast depletion, preventing entrance of the upstream villages' sewage and agricultural drained waters, which are sources of nitrate and phosphate contamination into the rivers, and also management of the usage of agricultural fertilizers have been suggested.

scholarly journals The Quality of Water Resources as a Factor of Regional Strategizing

2019 ◽  
pp. 143-153
Author(s):  
Natalya Kosolapova ◽  
Lyudmila Matveeva ◽  
Olga Chernova
Keyword(s):  
Water Quality ◽  
Economic Development ◽  
Water Resources ◽  
Water Quality Management ◽  
Water Quality Monitoring ◽  
The State ◽  
Water Users ◽  
Quality Of Water ◽  
Social And Economic Development

The purpose of this article is to study the processes of water quality management, which are considered as the main factor of the strategic social and economic development of the region and also to form tools supporting this process. The article analyzes the state and development trends of the water sector of the Rostov region from the standpoint of solving the problems of its strategic social and economic development. The authors demonstrate the possibility of intellectualization of regional strategizing processes through the use of water quality monitoring of the knowledge of experts with the use of fuzzy logic. The review of existing approaches to the assessment of water resources quality is given. It is shown that these approaches do not take into account the different requirements of water users to the content of chemicals and compounds in the water but assess the state of water resources in terms of conformity of concentration indices of polluting substances to maximally allowable concentrations. The authors suggest assessing the quality of water resources in compliance with the criteria of the contamination of water resources set for every category of water users. The approach proposed by the authors implies the assessment of water quality in two modes – differentiated and complex. Meanwhile, the suggested tools are universal and can be used in the systems of regional strategizing of the use of various water basins. A conceptual representation of the structure of the management system of water resources quality in the region within the system of regional strategizing is formed and the main problems of its development are identified.

Effects of Urbanization on Stream Ecosystems

2005 ◽  
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Biological Indicators ◽  
Taxonomic Composition ◽  
The State ◽  
Aquatic Biodiversity ◽  
Urban Sewage ◽  
Rehabilitation Potential ◽  
State Capital ◽  
Belo Horizonte

<em>Abstract.</em>—In Brazil, most urban sewage is discharged without treatment into rivers. This is the situation for the Rio das Velhas, which receives in its upper course the sewage of the state capital of Minas Gerais, Belo Horizonte, with more than 2.4 million inhabitants. Our study focuses on the effects of basin urbanization on aquatic biodiversity and water quality in the Rio das Velhas. We use the assemblage structure and taxonomic composition of fishes and benthic macroinvertebrates as biological indicators of water quality. Effects of Belo Horizonte’s discharge included changes in water quality and declines in fish and benthos richness and diversity. However, the absence of dams in the Rio das Velhas main course, associated with connectivity with the Rio São Francisco system and tributaries in excellent condition, increase its rehabilitation potential.

scholarly journals Development of a groundwater quality index: GWQI, for the aquifers of the state of Bahia, Brazil using multivariable analyses

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
José Barbosa Filho ◽  
Iara Brandão de Oliveira
Keyword(s):  
Water Quality ◽  
Cluster Analysis ◽  
Groundwater Quality ◽  
Hierarchical Cluster Analysis ◽  
Quality Index ◽  
Hierarchical Cluster ◽  
The State ◽  
Groundwater Quality Index ◽  
Multivariable Analyses

AbstractThis work elaborated a groundwater quality index—GWQI, for the aquifers of the state of Bahia, Brazil, using multivariable analyses. Data from 600 wells located in the four hydrogeological domains: sedimentary, crystalline, karstic, and metasedimentary, were subjected to exploratory statistical analysis, and 22 out of 26 parameters were subjected to multivariable analysis using Statistica (Version 7.0). From the PCA, 5 factors were sufficient to participate in the index, due to sufficient explanation of the cumulative variance. The matrix of factorial loads (for 1–5 factors) indicated 9 parameters related to water quality and 4 hydrological, with factor loads above ± 0.50, to be part of the hierarchical cluster analysis. The dendrogram allowed to choose the 5 parameters related to groundwater quality, to participate in the GWQI (hardness, total residue, sulphate, fluoride and iron). From the multivariable analyses, three parameters from a previous index—NGWQI, were not selected for the GWQI: chloride (belongs to the hardness hierarchical group); pH (insignificant factor load); and nitrate (significant factor load only for 6 factors), also, not a regionalized variable. From the set of communality values (5 factors), the degree of relevance of each parameter was extracted. Based on these values, were determined the relative weights (wi) for the parameters. Using similar WQI-NSF formulation, a product of quality grades raised to a power, which is the weight of importance of each variable, the GWQI values were calculated. Spatialization of 1369 GWQI values, with the respective colors, on the map of the state of Bahia, revealed good correlation between the groundwater quality and the index quality classification. According to the literature on water quality indexing, the GWQI developed here, using emerging technologies, is a mathematical tool developed as specific index, as it was derived using limits for drinking water. This new index was tailored to represent the quality of the groundwater of the four hydrogeological domains of the state of Bahia. Although it has a regionalized application, its development, using, factor analysis, principal component analysis, and hierarchical cluster analysis, participates of the new trend for WQI development, which uses rational, rather than subjective assessment. The GWQI is a successful index due to its ability to represent the groundwater quality of the state of Bahia, using a single mathematical formulation, the same five parameters, and unique weight for each parameter.

scholarly journals ZOOINDICATION OF WATER BODIES WITHIN PETROLEUM INDUSTRIAL TERRITORIES OF THE BOLSHEZEMELSKAYA TUNDRA

2021 ◽  
pp. 83-92
Author(s):  
T. Shikhova ◽  
E. Scopin ◽  
R. Bolshakov
Keyword(s):  
Species Diversity ◽  
River Basin ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
The State ◽  
Water Bodies ◽  
Large Lakes ◽  
Quality Of Water ◽  
State Of Water

Intensive development of the oil and gas industry and accidents on oil pipelines become the reason of the environmental tension in the Pechora River basin (Nenets Autonomous District). Data on changes in water quality in five lakes and a small watercourse in the territory of oil fields of the Bolshezemelskaya tundra are presented. The bioindication indices (Berger-Parker (D), Shannon biodiversity (H '), Woodiwiss (W), Pantle-Buck (S), Balushkina (Kch)) were applied. The assessment of the state of water bodies in the Kolva River Basin (large lakes - Kolvaty and Nercheity), in the Laya River Basin (shallow lakes - Krugloye, Bezymyannoe 1, Bezymyannoe 2, stream) was done. The 28 samples of zoobenthos was processed by the standard method in July 2012 and 2019. A low diversity of benthic invertebrates was revealed for 5–20 taxa of the rank of families and orders. During the considered period, the changes have occurred in the structure and composition of the zoobenthos of water bodies. In 2019, the species diversity decreased in Kolvaty Lake (H'<2). There are no species of the crustacean complex (Monoporeia affinis, Mesocyclops leuckarti, Heterocope borealis) and larvae of Trichoptera. Only Sphaeriidae and Chironomidae with a predominance of Psectrocladius psilopterus (D = 55%) were recorded. The species diversity in Nercheity Lake increased (H'> 2) with a change in the dominant taxa: the larvae of the chironomids Ablabesmyia monilis (D = 44%) were found in 2012, the lower crustaceans (D = 47–51%) - in 2019. However, according to the totality of hydrobiological indicators, the quality of water in the lakes of the Kolva River Basin in 2019 compared to 2012 did not change significantly. The quality of water in the Krugloye and Bezymyannoe 1, Bezymyannoe 2 lakes (the Laya River Basin) has improved that is confirmed by a significant increase of species diversity. The most characteristic groups of benthic communities in these lakes are lower crustaceans (Cladocera, Copepoda, Ostracoda) and Chironomidae. The indicators of clean waters are o-β-mesosaprobic species Cladocera, Copepoda Heterocope appendiculata, Heterocope borealis (in the oligotrophic lakes), caddisfly Limnephilus stigma (in the Krugloe Lake), rotifer Polyarthra euryptera (in the Bezymyannoe 2 Lake), mayfly larvae Centroptilum luteolum. More resistant to organic pollution Copepoda began to prevail in abundance and diversity in Bezymyannoe 1 and Bezymyannoe 2 lakes, with a decrease in the taxonomic composition of Cladocera, which indicates the eutrophication of these water bodies. In most lakes, the water corresponds to the III quality class ("moderate pollution"), but in the Kolvaty lake and in the Bezymyanny stream (the Laya River basin) was recorded the biogenic pollution. Totally, insignificant taxonomic changes in zoobenthos structure took place in the lakes and the state of water bodies of the surveyed tundra remains relatively stable.

scholarly journals The Mass Ratio of the Epiphytic Periphyton of the Nyéki-Holt-Duna

2016 ◽  
Vol 10 (3-4) ◽  
pp. 232-241
Author(s):  
Gyula Lakatos ◽  
Ildikó Mátrai ◽  
János Kundrát ◽  
István Gyulai
Keyword(s):  
Water Quality ◽  
Chemical Composition ◽  
Biological Indicators ◽  
Monitoring Systems ◽  
Ecological State ◽  
Mass Ratio ◽  
Chl A ◽  
State Of Water ◽  
Biological State

The knowledge of the periphytic structure is important for the fact that the composition of epiphytic periphyton indicates the ecologically different habitats, the biological state of water-quality and its changes. Plants like reed, great bulrush, saligot, pondweed, and water-rose separately were collected from the different sampling sites for the epiphytic periphyton examination. We performed the comparability of the monitoring systems based on the periphyton category (mass), the group (ash%), the type (chl-a%), and the character (AI), and we used the biological indicators to determine the ecological state. Taking into consideration the examined years and the results of the analysis of the mass and the chemical composition of the periphyton, by means of the NTPI, the overweight of the good ecological state is characteristic of the Nyéki-Holt-Danube.

scholarly journals Benthic Community and Assessment of Water Quality Using Biological Index in RAMSAR, Ninh Binh

2021 ◽  
Author(s):  
Do Van Nhuong ◽  
Tran Nam Hai ◽  
Nguyen Thi Nga ◽  
Tran Duc Hau
Keyword(s):  
Water Quality ◽  
Species Composition ◽  
Water Quality Assessment ◽  
Biological Indicators ◽  
Aquatic Environments ◽  
Biological Index ◽  
Northern Vietnam ◽  
Freshwater Bodies ◽  
Assess Quality

Van Long, the largest wetland RAMSAR in delta areas of northern Vietnam, is a famous destination for tourists, which might influence on water quality and biodiversity. Two surveys in September 2019 and May 2020 aimed to determine species composition of macrozoobenthos and build biological indicators to assess the water quality for biodiversity conservation. Present findings report a list of 41 species in 27 genera, 14 families of macrozoobenthos (Gastropoda, Bivalvia, Crustacea - Decapoda) in Van Long. Of which, Gastropoda is the most abundant, accounting for 58.5% of the total number of species, followed by Crustacean (26.8%) and Bivalvia (14.6%). Both Shannon-Weiner biodiversity (H') and Margalef indices “d” in rainy season are higher than those in dry season (H '= 2.565 vs. 2.466 and d = 4.987 vs. 3.286, respectively). For water quality assessment, based on TCVN 7220-2: 2002, the water in Van Long RAMSAR is in low level of pollution. According to ASPT index on average (3.42), this parameter was under medium to heavily polluted. The results recommend utilizing family taxon of macrozoobenthos with the recorded scales to assess quality of aquatic environments of freshwater bodies in northern Vietnam.

scholarly journals Dynamics of satisfaction of young people in Kazan with the quality of the urban environment

2021 ◽  
Author(s):  
С.А. Алексеев ◽  
В.А. Федорова ◽  
Г.Р. Сафина
Keyword(s):  
Young People ◽  
Urban Environment ◽  
Urban Infrastructure ◽  
The State ◽  
Sports Facilities ◽  
Ecological Situation ◽  
State Of Water ◽  
The City ◽  
Sanitary State

В статье на основании авторских эмпирических исследований, проведенных в 2017 г. и 2021 г., рассматривается динамика удовлетворенности молодежи г. Казани экологическими и социальными аспектами качества городской среды. Полученные данные свидетельствуют о том, что экологическая обстановка и состояние городской инфраструктуры сохраняют для молодого поколения свою значимость. При сохранении позитивных тенденций относительно большинства показателей, характеризующих экологическую ситуацию, выявлено снижение доли удовлетворенных состоянием водных объектов и санитарным состоянием города. Что касается городской инфраструктуры, то выявлено снижение удовлетворенности ее общим состоянием, а также такими составляющими как количество организованных автостоянок и количество спортивных объектов. Кроме того, в работе анализируются факторы, определяющие привлекательность для молодежи районов города, и выделяются наиболее важные мероприятия, направленные на улучшение качества городской среды. Based on the author's empirical research carried out in 2017 and 2021, the article examines the dynamics of satisfaction of young people in Kazan with the ecological and social aspects of the quality of the urban environment. The data obtained indicate that the ecological situation and the state of the urban infrastructure retain their importance for the younger generation. While maintaining positive trends in relation to most of the indicators characterizing the ecological situation, a decrease in the share of those satisfied with the state of water bodies and the sanitary state of the city was revealed. As for the state of the urban infrastructure, a decrease in satisfaction with its general state, as well as with such components as the number of organized parking lots and the number of sports facilities, was revealed. The work also analyzes the factors that determine the attractiveness of city districts for young people and highlights the most important measures aimed at improving the quality of the urban environment.

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