scholarly journals Probabilistic nature of water and environmental standards

2021 ◽  
Vol 2094 (5) ◽  
pp. 052016
Author(s):  
M Rosental ◽  
G A Sambursky
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Maximum Permissible Concentration ◽  
Water Bodies ◽  
Environmental Standards ◽  
Safe Level ◽  
Toxicant Concentration ◽  
Toxicological Studies ◽  
Probabilistic Nature

Abstract Determination of permissible concentrations of pollutants in relation to water bodies and water quality is the basis for further measures to form technological approaches to water treatment and wastewater treatment, to determine the standards of permissible exposure and technological indicators. The main standard, which is the basis for such calculations - the maximum permissible concentration (MPC) of pollutants or the approximate safe level of exposure (S), are threshold (deterministic) values. It is assumed that the establishment, for example, of the MPC for fisheries water bodies is based on the analysis of toxicological indicators. However, in fact, rationing is carried out on the basis of selective toxicological studies [1], which do not provide such determinism. The obtained data characterize only the influence of the selected levels of toxicant concentration on the studied organisms.

Water quality of the Beli Lom river

1999 ◽  
Vol 39 (8) ◽  
pp. 55-62 ◽  
Author(s):  
Anastasios I. Stamou ◽  
Bogdana Koumanova ◽  
Stoyan Stoyanov ◽  
Georgy Atanasov ◽  
Konstantinos Pipilis
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Finite Difference ◽  
Treatment Plant ◽  
Quality Characteristics ◽  
Order Model ◽  
The Third ◽  
Do Concentration

A general methodology for the study of water quality in rivers is presented. The paper consists of four parts. In the first part the general characteristics of the area of study, which is the Beli Lom river, and its major pollution sources are presented. The effluent of the Razgrad Wastewater Treatment Plant (RWWTP) has been identified as the most significant pollution point source, due to the inadequate performance of the plant. The second part deals with data collection and processing. Four series of data have been collected, including physical, flow and water quality characteristics. In the third part a 1-d, finite-difference, second-order model is presented. In the fourth part, the model is calibrated, for the determination of its main coefficients, and is successfully verified by predicting the BOD and DO concentrations in the Beli Lom river for all series of data. Finally, the model has been applied to determine the maximum BOD and minimum DO effluent concentrations of the RWWTP, so that a minimum DO concentration is maintained throughout the river.

scholarly journals Assessing carrying capacity of receiving water bodies – A case study in Southern waterways of Binh Duong province

2019 ◽  
Vol 2 (6) ◽  
pp. 84-97
Author(s):  
Le Ngoc Tuan ◽  
Tao Manh Quan ◽  
Tran Thi Thuy ◽  
Doan Thanh Huy ◽  
Tran Xuan Hoang
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Carrying Capacity ◽  
Water Quality Management ◽  
Pollution Source ◽  
Water Bodies ◽  
Source Control ◽  
Local Pollution ◽  
Surface Water Management ◽  
Receiving Water

The carrying capacity of receiving water bodies is one of the important data for water quality management, pollution source control towards harmonizing with the economic development and environment protection. Therefore, this research aimed atevaluating the carrying capacity of receiving water bodies in the south of Binh Duong province up to 2030. 06 key water quality indicators (COD, BOD, TSS, PO43--P, NO3--N, NH4+-N) were exmained with 02 wastewater treatment scenarios. Results showed the investigated area hardly had carrying capacity for NH4+-N and PO43--P, followed by TSS, BOD, and COD. In case of improving wastewater treatment status till 2030, the carrying capacity of receiving water bodies would be increased, but not significant. The carrying capacity of several basins needs to be paid special attention are: Suoi Con 1 basin (BOD, COD, NH4+-N), Suoi Cai basin (BOD, TSS and NH4+-N), the upstream of Cay Bang – Cau Dinh basin (BOD, COD, TSS, NH4+-N), the upstream of Chom Sao – Rach Bung basin (05 parameters, excepting NO3--N), the upstream of Binh Hoa – Vinh Binh basin (BOD, COD, PO43--P, NH4+-N). These findings are an important basis for formulating strategies and proposing measures for local pollution source control and surface water management.  

Methodology for Reliable Assessment of the Water Quality. II. General Probabilistic Nature of Water Composition Standardization and Assessment

2020 ◽  
Vol 24 (9) ◽  
pp. 58-63
Author(s):  
V.I. Danilov-Danilyan ◽  
O.M. Rosenthal
Keyword(s):  
Water Quality ◽  
Maximum Permissible Concentration ◽  
Water Quality Management ◽  
Water Quality Assessment ◽  
Loss Functions ◽  
Water Composition ◽  
Reliable Assessment ◽  
Industrial Water Use ◽  
Probabilistic Nature ◽  
Oriented Approach

The article continues a series of works devoted to two closely related aspects of water quality management in natural objects and water utilization – ensuring the reliability of water quality assessment and optimizing of its standardization. It was shown that the risks of false conclusions equally arise both when setting a standard – the maximum permissible concentration of pollutants in a water body, and when monitoring compliance with established requirements. It was demonstrated on specific examples that in both cases, depending on the method of the research error registration, opposite conclusions concerning the water quality can be obtained. To obtain scientifically based results, a risk-oriented approach, as well as the statistical methods that use loss functions in various modifications are required. A solution to the problem of assessing the reliability of determining the water quality class on the example of a typical challenge of industrial water use was provided, recommendations on the arbitration method in connection with the assessment of the correctness of the water attributing to restrictive standards were also proposed.

scholarly journals The river absorption capacity determination as a tool to evaluate state of surface water

2018 ◽  
Vol 22 (2) ◽  
pp. 1033-1050 ◽  
Author(s):  
Paweł Wilk ◽  
Paulina Orlińska-Woźniak ◽  
Joanna Gębala
Keyword(s):  
Water Quality ◽  
Water Quality Management ◽  
Absorption Capacity ◽  
Nutrient Loads ◽  
Environmental Standards ◽  
Systematic Assessment ◽  
Load Limit ◽  
Management Plans

Abstract. In order to complete a thorough and systematic assessment of water quality, it is useful to measure the absorption capacity of a river. Absorption capacity is understood as a pollution load introduced into river water that will not cause permanent and irreversible changes in the aquatic ecosystem and will not cause a change in the classification of water quality in the river profile. In order to implement the method, the Macromodel DNS/SWAT basin for the Middle Warta pilot (central Poland) was used to simulate nutrient loads. This enabled detailed analysis of water quality in each water body and the assessment of the size of the absorption capacity parameter, which allows the determination of how much pollution can be added to the river without compromising its quality class. Positive values of the calculated absorption capacity parameter mean that it is assumed that the ecosystem is adjusted in such a way that it can eliminate pollution loads through a number of self-purification processes. Negative values indicate that the load limit has been exceeded, and too much pollution has been introduced into the ecosystem for it to be able to deal with through the processes of self-purification. Absorption capacity thus enables the connection of environmental standards of water quality and water quality management plans in order to meet these standards.

scholarly journals Societal Implications of Forest and Water Body Area Evolution in Czechia and Selected Regions

2021 ◽  
Vol 13 (19) ◽  
pp. 4019
Author(s):  
Diana Carolina Huertas Bernal ◽  
Ratna Chrismiari Purwestri ◽  
Mayang Christy Perdana ◽  
Miroslav Hájek ◽  
Meryem Tahri ◽  
...  
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Land Cover ◽  
Water Body ◽  
Public Perception ◽  
Forest Cover ◽  
Wastewater Treatment Plants ◽  
Water Bodies ◽  
Societal Implications ◽  
Natural Ecosystems

Land cover evolution is an environmental factor that can be used to characterize forest ecosystem services (FES). This study aims to analyze the change in forest cover and water bodies between 1990 and 2018 in the whole Czech Republic, and in the Central Bohemian and South Moravian regions, and its effects on freshwater provision. Additionally, we attempt to understand the societal implications of water quality, public perception, and environmental investment on natural ecosystems. Forest cover and water body data were obtained from the Corine land cover database, while water quality and investment were compiled from the Czech Statistical Office. Public perceptions on the Czech FES were collected from a national survey. Between 1990 and 2018, forest cover has increased by 3.94% and water bodies by 7.65%; however, from 2014 to 2018, severe droughts were reported that compromised the availability of surface water, presumably on artificial structures, causing an increase in the occupied area. Regarding public perception, respondents with less education, and the older population, obtained an assessment of the low performance of the FES, while the water quality and investment indicate that environmental funding has contributed to improving the quality of outflow water from the wastewater treatment plants, fulfilling all the allowed limits of the urban wastewater treatment directive. Hence, a multidisciplinary approach can help decision makers promote policies that integrate environmental management measures, investment protection, and contribute to sustainable development.

scholarly journals Penentuan Status Mutu Air Dengan Metode Indeks Pencemaran Dan Strategi Pengendalian Pencemaran Sungai Ogan Kabupaten Ogan Komering Ulu

2019 ◽  
Vol 17 (3) ◽  
pp. 486
Author(s):  
Enda Kartika Sari ◽  
Oki Endrata Wijaya
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
River Water ◽  
Control Strategy ◽  
Pollution Control ◽  
Fecal Coliform ◽  
Pollution Index ◽  
Water Bodies

Sungai Ogan merupakan sumber air bagi intake PDAM  Kabupaten Ogan Komering Ulu. Kenyataan tersebut, dipandang perlu untuk menentukan evaluasi kualitas air Sungai Ogan yang bersifat kompleks dengan melibatkan banyak parameter yang berpengaruh terhadap badan air serta perlu merumuskan strategi pengendalian pencemaan air yang perlu dilakukan. Penggunaan indeks kualitas air dapat mempermudah penentuan kualitas badan air serta mempermudah juga dalam pemberian informasi kepada pihak yang membutuhkan. Tujuan penelitian ini adalah menentukan status mutu air dan strategi pengendalian pencemaran air sungai Ogan Kabupaten Ogan Komering Ulu. Metode yang digunakan dalam penelitian ini adalah metode purposive sampling dengan menggunaan perhitungan indeks pencemaran air di 5 titik lokasi sampling. Penentuan status mutu air menggunakan metode indeks pencemaran menurut Kepmen LH 115/2003. Parameter yang diamati dan diukur ada 10 paramater dengan menggunakan metode Standar Nasional Indonesia (SNI) pengukuran kualitas air dan limbah, Menurut Peraturan Gubernur Sumatera Selatan No 16/2005 meliputi sifat fisika, kimia dan biologi dari badan air sungai yaitu suhu, kekeruhan, TSS, pH, DO, BOD, Nitrat, Phospat, MBAS dan Fecal Coliform. Hasil yang didapatkan Status mutu air dengan menggunakan indeks pencemaran stasiun 1-5. termasuk dalam kategori tercemar ringan dengan kisaran nilai 1,3 – 2,3. Strategi pengendalian pencemaran sungai dapat dilakukan dengan pengurangan beban pencemaran yaitu dengan melibatkan masyarakat dalam pengelolaan lingkungan sungai dan perlu melakukan efektifitas pengelolaan dan manajemen IPAL yang lebih baik yang lebih melibatkan peran serta masyarakat dalam teknis pengelolaannya, serta perlunya pemantauan rutin kualitas air sungai dan memetakan sumber-sumber pencemar potensial pada setiap lokasi sehingga permasalahan akan cepat teratasi.The Ogan River is a source of water for the intake of the Ogan Komering Ulu Regency PDAM. This fact is deemed necessary to determine the evaluation of the water quality of the Ogan River which is complex by involving many parameters that affect the water body and needs to formulate a water pollution control strategy that needs to be done. The use of a water quality index can facilitate the determination of the quality of water bodies and also facilitate the provision of information to those in need. The purpose of this study was to determine the status of water quality and the control strategy of Ogan Komering Ulu District water pollution. The method used in this study was purposive sampling method by using the calculation of the water pollution index in 5 sampling locations. Determination of water quality status using the pollution index method according to Kepmen LH 115/2003. The parameters observed and measured were 10 parameters using the Indonesian National Standard (SNI) method of measuring water and waste quality, According to the Governor of South Sumatra Regulation No. 16/2005 covering physical, chemical and biological properties of river water bodies namely temperature, turbidity, TSS, pH, DO, BOD, Nitrate, Phosphate, MBAS and Fecal Coliform. Results obtained status of water quality by using station pollution index 1-5. included in the category of light polluted with a range of values 1.3 - 2.3. River pollution control strategies can be carried out by reducing pollution load, namely by involving the community in managing the river environment and need to make better management and management of WWTPs that are more involved community in its technical management, as well as the need for regular monitoring of river water quality and mapping potential pollutant sources at each location so that problems will be quickly resolved

Setting the threshold: An analysis of different approaches for the definition of exemptions to water quality objectives in the European Union

2020 ◽  
Author(s):  
Antonio Bolinches ◽  
Lucia De Stefano ◽  
Javier Paredes-Arquiola ◽  
Carlotta Valerio ◽  
Alberto Garrido
Keyword(s):  
Water Quality ◽  
European Union ◽  
Wastewater Treatment ◽  
Water Framework Directive ◽  
River Basin ◽  
Water Bodies ◽  
The European Union ◽  
Nitrogen And Phosphorus ◽  
Member States ◽  
Environmental Objectives

<p>Continental water ecosystems and human water uses may be jeopardized by degradation of water quality.  To prevent this degradation, the maximum concentration of pollutants for freshwater bodies may need to be set in the legislation. In some cases, the actions needed to achieve those environmental objectives may be technically challenging or financially overburdening. In the case of the European Union (EU), the Water Framework Directive (WFD, Article 4) requires the achievement of the good status of water bodies but allows for the declaration of exemptions due to lack of technical feasibility or disproportionate costs. Twenty years after the WFD approval, the conditions to declare exemptions remain unclear and in practice their declaration  is highly discretional.</p><p>The extant scientific literature suggests several methods to formulate the justification of exemptions. Although the methodologies are diverse, they all require to select a threshold (e.g. in terms of cost disproportionality) above which a relaxation of the environmental objectives may be accepted. This threshold should be uniform across the EU River Basin Districts in order to guarantee a fair distribution of efforts across Member States. To date, however, there are very few studies that compare the application of exemptions in different regions to assess the uniformity of approaches to the declaration of exceptions.</p><p>When defining actions to achieve the good status of water bodies, the quantification of the different pressures, their interactions and the effects on receiving water bodies can be challenging. In the case of physico-chemical pollutants, however, it can be easier to define policy actions as pressures can be quantified (point loads of wastewater treatment plants, diffuse loads emanated by different land uses) and the evolution in receiving waters can be modelled.</p><p>In our research, we analyzed over one thousand water bodies in the River Basin Districts of five different Member States of the European Union (Estonia, a transboundary Ireland-United Kingdom basin, Italy, Spain and Portugal), using the available databases on Digital Elevation Models (Copernicus EU-DEM), land use (CORINE land cover), urban pressures (European Urban Wastewater Treatment Directive dissemination platform and reported data), runoff and gauged flows (Water Information System for Europe, national gauging networks) and WFD exemption databases. Each water body was characterized according to the level of nitrogen and phosphorus pressures deriving from point and diffuse loads, and the declaration of exemptions to the environmental objectives for those nutrients. The exemption threshold is assessed for each River Basin District, allowing for a critical review of the different water policies in this significant aspect of the Water Framework Directive implementation.</p>

DETERMINATION OF CHEMICAL AND TOXICOLOGICAL CHARACTERISTICS OF WATER QUALITY IN RECREATIONAL AREAS ON THE MATYRA RIVER

2021 ◽  
pp. 39-45
Author(s):  
Екатерина Юрьевна Иванова
Keyword(s):  
Water Quality ◽  
Chlorella Vulgaris ◽  
Water Samples ◽  
Inorganic Compounds ◽  
Growth Stimulation ◽  
Ammonium Ion ◽  
Relative Toxicity ◽  
Toxicological Studies ◽  
Organoleptic Parameters

В работе приведены и проанализированы данные химических и токсикологических исследований воды р. Матыра Липецкой области. Отмечены превышения допустимых значений по органолептическим показателям, а также по сульфатам, аммоний-иону и нитритам. Кроме того, было проведено определение относительной токсичности с помощью метода, основанного на регистрации изменений оптической плотности культуры водоросли хлорелла ( Chlorella vulgaris ). В результате биотестирования показано, что все пробы воды проявили токсичность, которая проявляется в стимуляции роста культуры хлорелла. Такая стимуляция роста свидетельствует о том, что исследованные пробы содержат легкоусвояемые органические и неорганические соединения. При сравнении полученных значений концентраций с предыдущими исследованиями отмечена отрицательная динамика по всем определяемым загрязняющим веществам, что свидетельствует о снижении качества воды. The paper presents and analyzes the data of chemical and toxicological studies of the water of the Matyra river of the Lipetsk region. Excess of permissible values for organoleptic parameters, as well as for sulfates, ammonium ion and nitrites were noted. In addition, the relative toxicity was determined using a method based on the registration of changes in the optical density of the Chlorella (Chlorella vulgaris) algae culture. The results of the bioassay showed that all water samples demonstrated toxicity, which manifests itself in stimulating the growth of chlorella culture. Such growth stimulation indicates that the samples studied contain easily digestible organic and inorganic compounds. When comparing the obtained concentration values with previous studies, negative dynamics was noted for all identified pollutants, which indicates a decrease in water quality.

scholarly journals Determination of the Physicochemical and Microbiological Index of the River Chakvistskali

2021 ◽  
Author(s):  
Nino Lomtatidze ◽  
Marine Gvianidze
Keyword(s):  
Water Quality ◽  
Water Resources ◽  
Environmental Impact ◽  
The Self ◽  
Water Bodies ◽  
Anthropogenic Load ◽  
Anthropogenic Factors ◽  
Anthropogenic Eutrophication ◽  
Water Ecosystem

The growing impact of the anthropogenic factors on the environment has intensified the importance of protecting the water ecosystem. The degrading of water resources is a frequent result of the anthropogenic eutrophication resulting in imbalance of substance levels and deterioration of sanitation and recreational condition of water. The environmental impact of contaminants is manifested at the level of organisms, populations, biocenosis, and ecosystems. In the context of the increased anthropogenic load, the growing contamination of water bodies impairs the self-cleansing capacity of water, causes eutrophication and reduces water quality.

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