scholarly journals ENVIRONMENTAL ASSESSMENT OF WATER QUALITY OF THE LITTORAL ZONE OF LAKE LADOGA BASED ON THE RESULTS OF MICROBIOLOGICAL STUDIES

2020 ◽  
pp. 88
Author(s):  
Галина Геннадьевна Митрукова ◽  
Лариса Леонидовна Капустина ◽  
Евгений Александрович Курашов ◽  
Galina Mitrukova ◽  
Larisa Kapustina ◽  
...  
Keyword(s):  
Water Quality ◽  
Environmental Assessment ◽  
Littoral Zone ◽  
Lake Ladoga

scholarly journals Dynamics of changes in surface water quality indicators of the Western Bug River basin within Ukraine using GIS technologies

2019 ◽  
Vol 42 (1) ◽  
pp. 67-75 ◽  
Author(s):  
Igor Gopchak ◽  
Tetiana Basiuk ◽  
Ihor Bialyk ◽  
Oleg Pinchuk ◽  
Ievgenii Gerasimov
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Environmental Assessment ◽  
Land Surface ◽  
Surface Water Quality ◽  
Ecological Condition ◽  
Toxic Substances ◽  
Ecological Index ◽  
Gis Technologies

Abstract The environmental assessment of the surface water quality of the Western Bug River has been made using the system of classification quality of land surface water of Ukraine in accordance with the approved methodology, which allows comparing water quality of separate areas of water objects of different regions. The calculation of the environmental assessment of water quality has been carried according to three blocks: block of salt composition, block of trophic and saprobic (ecological and sanitary) indicators and block of indicators of content of specific toxic substances. The results are presented in the form of a combined environmental assessment, based on the final conclusions of the three blocks and consists in calculating the integral ecological index. Comprehensive studies of changes in the water quality of the Western Bug River have been conducted within the territory of Ukraine for a long-term period. The water quality of the river on the final values of the integral indicators of the ecological condition corresponded mainly to 4nd category of the 3rd class – the water is “satisfactory” by condition and “little polluted” by degree of purity (except for points of observation that located within the Volyn region, where the water quality corresponded to 3rd category and the 2nd class. It is “good” by condition and “fairly clean” by the degree of purity). Visualization and part of the analysis are performed using GIS technologies in the software of the ArcGIS 10.3.

The spatial distributions of seepage flux and water quality of groundwater in the littoral zone of Lake Biwa

2002 ◽  
Vol 28 (3) ◽  
pp. 1526-1532
Author(s):  
Masao Kobayashi ◽  
Koichi Kitaoka ◽  
Kimiko Horiuchi
Keyword(s):  
Water Quality ◽  
Littoral Zone ◽  
Lake Biwa ◽  
Spatial Distributions

scholarly journals Environmental assessment of water quality in various lakes of the Volyn region, which is intensively used in recreation

2020 ◽  
Keyword(s):  
Water Quality ◽  
Environmental Assessment ◽  
Ecological Status ◽  
Ecological Assessment ◽  
Limiting Factors ◽  
Practical Significance ◽  
High Quality ◽  
Ecological Index ◽  
Quality Of Water

Introduction. Assessment of the ecological status of lakes is important for their conservation and protection. Many lakes are intensively used in recreation in Volyn Region. The development of the resort and recreational facilities requires significant additional volumes of fresh water to maintain the depth of the reservoirs in the bathing area, certain sanitary and temperature regimes of the reservoirs. The limiting factors are the sanitary and hygienic indicators of water. First and foremost, high quality of water should be provided for the organization of contact types of recreation (bathing, diving, water skiing, etc.). The purpose of article. The purpose of the article is ecological assessment of water quality in various lakes of Volyn Region, which are most intensively used in recreation. Methods. Research methods are expeditionary, methods of mathematical statistics and environmental assessment of water quality, which were carried out in accordance with the methodology for assessing the quality of surface water in the respective categories. During the preparation of the article, materials from their own expeditionary studies of the natural-economic state of the lakes were used, as well as the results of chemical analysis of the water composition conducted by the Water and Soil Monitoring Laboratory of the Regional Water Resources Office in Volyn Region and the Complex Laboratory for Observation of the Environmental Environmental Center. Results. The analysis of the qualitative indicators of the lakes Svitiaz, Velyke Zgoranske and Somyn showed the high quality of water in the lakes. For the period of 2015–2019, water quality was classified as „good” class II, by degree of cleanliness „clean”, by category as „very good”, by degree of cleanliness „clean” on all lakes. The value of IE for the Lake Velyke Zgoranske varied in the range of 1.81–2.44, in the range of 1.66–2.07 for the Lake Svitiaz, and in the range of 2.56–2.96 for the Lake Somyn. Index І2 (ecological and sanitary indicators) has the most influence on the magnitude of the ecological index of water quality. The scientific novelty lies in establishing block and integral indexes of ecological assessment of water quality, classes and categories of water quality of the most recreationally-developed lakes of Volyn Region, as well as in assessment of the dynamics of indicators of water quality of lakes during the years of 2015–19. Practical significance is defined with the opportunity of development of a set of measures for the rational use and protection of lakes.

Effect of Low Water Level on the Water Quality of the Littoral Zone in Lake Kinneret

1993 ◽  
Vol 27 (7-8) ◽  
pp. 363-371 ◽  
Author(s):  
Sarig Gafny ◽  
Avital Gasith
Keyword(s):  
Water Quality ◽  
Littoral Zone ◽  
Suspended Solids ◽  
Major Change ◽  
Open Water ◽  
Water Levels ◽  
Lake Kinneret ◽  
Significant Difference ◽  
High Lake Levels

Water quality in the shallow littoral of Lake Kinneret was examined during a period of low water levels in 1989-1990. On calm days, no significant difference was found between the water quality on different sites around the lake or between the littoral and the open water. Lowering of the lake level in Lake Kinneret is associated with a major change in the nature of the bottom of the littoral zone in many sites, from rocky substrate in high lake levels (>212m below sea level) to sandy or clay in lower levels. During north-easterly storms, in winter, the concentrations of suspended solids and total phosphorus were markedly higher in leeward littoral sites compared to other regions of the littoral zone. This may be attributed to resuspension of sediments by the wave action over the soft bottom. In rainy winters, runoff, mainly Jordan River input, may locally affect the water quality and result in a north-south gradient.

scholarly journals ECOLOGICAL ASSESSMENT OF SURFACE WATER QUALITY OF ROSTAVYTSIA RIVER

2020 ◽  
pp. 86-92
Author(s):  
Pavlo Smilii ◽  
Mykhailo Melniychuk
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Quality Indicators ◽  
Environmental Assessment ◽  
Surface Waters ◽  
Ecological Status ◽  
Surface Water Quality ◽  
Ecological Assessment ◽  
Salt Composition

Purpose – perform ecological assessment of the surface waters of the Rostavytsia river within the Zhytomyr region. Method. Environmental assessment of the surface water of the Rostavytsia river was carried out using the system of classification of standards for the assessment of surface water quality of Ukraine. On the basis of common environmental criteria, the methodology makes it possible to compare the quality of water at different sites of water bodies, in water bodies of different regions. The calculation of the ecological assessment of water quality was carried out within three blocks: block of salt composition (І1), block of trophic-saprobiological (ecological-sanitary) indicators (І2) and block of indicators of content of specific substances of toxic action (І3). The results are presented in the form of a combined environmental assessment based on the final conclusions of the three blocks and based on the calculation of the integrated environmental index (IE). Results. Omprehensive studies on changing the water quality of the Rostavytsia river were conducted within the Zhytomyr region during 2016-2017. The water quality of the river according to the final values of the integral indicators of water quality of the three blocks varies within the II and III quality classes. The total environmental indices (IE) for the mean and worst indices are 3,2 and 3,3 respectively. In general, the water quality along the main channel of the Rostavytsia river within the Zhytomyr region corresponds to the second class, 3 categories, 3 subcategories according to the average quality indicators and 3(4) subcategories by worst performance. The total values of the integral surface water quality indicators of the Rostavytsia river indicate their contamination by trophic-saprobiological components. Scientific novelty. For the first time, on the basis of analytical studies and stock materials, an ecological assessment of the surface waters of the Rostavytsia river within the Zhytomyr region was carried out by three blocks of indicators: salt composition, trophic-saprobiological indicators and specific toxic substances. The integral ecological index is determined. The trends of pollutants accumulation in the surface waters of the Rostavytsia river have been established. Practical significance. The conducted researches allowed to analyze and evaluate the ecological status of the surface waters of the Rostavytsia river within the Zhytomyr region, which will allow to establish ecological standards of water quality and on this basis to determine the main directions for improvement of water resources and to substantiate the system of recommendations aimed at improving the ecological status of the studied basin.

scholarly journals Choice of benthic macroinvertebrate-based metrics for assessing water quality in the littoral zone under anthropogenic disturbance in southern Lake Kivu (Central Africa)

2021 ◽  
Author(s):  
Béni Hyangya ◽  
Alidor Kankonda Busanga ◽  
Dusabe Marie-Claire ◽  
Murhimanya Jean-Diste Kulimushi ◽  
Kaningini Boniface Mwenyemali ◽  
...  
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Littoral Zone ◽  
Central Africa ◽  
Biotic Index ◽  
Benthic Macroinvertebrate ◽  
Toxicological Assessment ◽  
Lake Kivu ◽  
Ept Taxa

Benthic macroinvertebrates are widely used to assess the ecological quality of fresh waters. This is because they are in direct contact with the aquatic environment and respond differently to pollutants and changes in the watershed, which are difficult to assess by toxicological or chemical monitoring alone. this study used benthic macroinvertebrate parameters to assess the quality of the nearshore waters of lake Kivu. Twenty-six metrics covering various aspects of the community were tested using whisker plots to compare their sensitivity in discriminating between reference and disturbed stations. Nine parameters (% EPT taxa, % Diptera taxa, % Chironomid taxa, % Insect taxa; % no Insects taxa, ratio EPT/Chironomid taxa, % moderate tolerant taxa, % very moderate tolerant taxa, Family Biotic Index) were found to be sensitive and were able to discriminate between reference and disturbed stations. All sensitive metrics, with the exception of the percentage of EPT taxa, were positively and/or negatively correlated with the physico-chemical parameters affected by the changes in the littoral zone. The combined values of the three calculated biotic indices (ASPT, BMWP and FBI) showed that the biological water quality varies from moderate to good in the reference stations and from average to poor in the disturbed stations. It is concluded that metrics based on benthic macroinvertebrates are effective for assessing water quality in the littoral zone of Lake Kivu in the context of the lack of historical water quality databases and specific tools for toxicological assessment. It is suggested to compare the performance of this approach with others currently used in bio-indication.

scholarly journals Ecological assessment of the Zaporizhzya (Dniprovsky) reservoir

2021 ◽  
Author(s):  
Y. V. Nikolenko ◽  
◽  
O. V. Fedonenko ◽  
Keyword(s):  
Water Quality ◽  
Environmental Assessment ◽  
Surface Water Quality ◽  
High Amplitude ◽  
Water Area ◽  
Water Bodies ◽  
Annual Data ◽  
Ecological State ◽  
Exposure Indicators

Environmental assessment of water is an integral part of monitoring water bodies. It provides information about water as a component of the aquatic ecosystem, the habitat of hydrobionts and an essential part of the natural environment, which is necessary for establishing environmental standards for water quality and adoption of measures to improve the ecological state of water bodies. Assessment of the quality of the ecological environment is an important parameter of sustainable development, necessary for the rational use of nature. Currently, the Zaporizhzhia (Dnipro) reservoir is exposed to increased anthropogenic impact, which affects water quality. The ecological state of the reservoir is deteriorating, and mass algal bloom is observed. The work aims to provide an integrated environmental assessment of water quality in different sites of the Zaporizhzhia reservoir. The study was conducted in 2019 at 5 sites along the course of the Zaporizke reservoir, which differ in hydrological and hydrochemical conditions: Samara Bay, Festivalnyi pier, Monastyrsky island, creek of the Mokra Sura river and the lower section of the reservoir (near Viyskove village), following generally accepted hydrobiological methods. The article calculates block indices and provides an environmental assessment of the water quality of the Zaporizhzhia reservoir according to the "Methodology for environmental assessment of surface water quality in the corresponding categories. The assessment of water quality by the criteria of contamination with salt composition components indicates that the water body condition is good at most of the studied points. The worst indicators were recorded in Samara Bay, where increased mineralization is observed for a long time. The trophic-saprobological block revealed to have the worst indicators and a high amplitude of index fluctuations. No significant deviations were observed in terms of the content of toxic and radiation exposure indicators throughout the entire studied water area, which makes it possible to assign water to the same class. It has been determined that the water quality of the Zaporizhzhia reservoir according to the average annual data is characterized as "good" in terms of the state and "clean, fairly clean" in terms of purity degree. However, during the study period, significant deviations from the average were observed, especially in the summer. There is a need for systematic monitoring of the reservoir, the establishment of annual dynamics, which will make it possible to determine the causes of deteriorating water quality and develop ways to address them.

Sign in / Sign up

Export Citation Format

Share Document