New Trends in Water Quality Management

1982 ◽  
Vol 14 (1-2) ◽  
pp. 47-72 ◽  
Author(s):  
P Benedek
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Surface Waters ◽  
Suspended Solids ◽  
Quality Management System ◽  
Management Practice ◽  
Water Quality Management ◽  
Danube River ◽  
Drinking Water Production

In the present water quality management practice the ambient water quality is determined on the basis of classification of recipients. This system disregards, however, the fact that the majority of hazardous micropollutants is tending to accumulate in suspended solids and may contaminate the bottom sediment. The proposed water quality management system is aiming at providing potable water of good quality without any regards to classification of surface waters. The tasks are outlined on the basis of morphological, hydrological, hydraulic and technological conditions of drinking water production. In this approach both the previous events i.e. deposition or scouring of polluted bottom silt and the transport of suspended solids with coupled micropollutants are involved. The new system is focused on Danube river, since the water supply or rather the bank-filtered water resources along it is endangered at many locations by accumulated pollutants in bed load.

scholarly journals Mixtures of chemicals are important drivers of impacts on ecological status in European surface waters

2019 ◽  
Vol 31 (1) ◽  
Author(s):  
Leo Posthuma ◽  
Werner Brack ◽  
Jos van Gils ◽  
Andreas Focks ◽  
Christin Müller ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Surface Waters ◽  
Water Quality Management ◽  
Ecological Status ◽  
Ecological Impacts ◽  
Chemical Pollution ◽  
Individual Species ◽  
Integrated Analysis ◽  
Chemical Mixtures

Abstract The ecological status of European surface waters may be affected by multiple stressors including exposure to chemical mixtures. Currently, two different approaches are used separately to inform water quality management: the diagnosis of the deterioration of aquatic ecosystems caused by nutrient loads and habitat quality, and assessment of chemical pollution based on a small set of chemicals. As integrated assessments would improve the basis for sound water quality management, it is recommended to apply a holistic approach to integrated water quality status assessment and management. This allows for estimating the relative contributions of exposure to mixtures of the chemicals present and of other stressors to impaired ecological status of European water bodies. Improved component- and effect-based methods for chemicals are available to support this. By applying those methods, it was shown that a holistic diagnostic approach is feasible, and that chemical pollution acts as a limiting factor for the ecological status of European surface waters. In a case study on Dutch surface waters, the impact on ecological status could be traced back to chemical pollution affecting individual species. The results are also useful as calibration of the outcomes of component-based mixture assessment (risk quotients or mixture toxic pressures) on ecological impacts. These novel findings provide a basis for a causal and integrated analysis of water quality and improved methods for the identification of the most important stressor groups, including chemical mixtures, to support integrated knowledge-guided management decisions on water quality.

scholarly journals DYNAMIC SURFACE WATER QUALITY MANAGEMENT SYSTEM

2021 ◽  
Vol 1 (6) ◽  
pp. 144-149
Author(s):  
N.O. Popovyan ◽  
◽  
A.B. Usov
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Quality Management System ◽  
Water Quality Management ◽  
Surface Water Quality ◽  
Maximum Permissible Level ◽  
Dynamic Surface ◽  
Treatment Facilities ◽  
Reverse Situation

The article examines the interaction of subjects of a two-level hierarchical system. An industrial enterprise discharges wastewater into the river as a result of its work. To prevent the ingress of a large amount of pollutants, water treatment facilities have been installed, the operation of which is regulated by the level of technical support. The state allocates funds to support the activities of the enterprise and regulates the standards for the discharge of pollutants. The interests of both subjects are to maximize their target functional. The article is devoted to the problem of finding optimal control in a mathematical model of water quality management in a dynamic system. Examples of calculations for specific parameters are given. Based on the examples given, we can draw conclusions about the influence of parameters on the system. The type of the emitted substance has the greatest influence on the system, namely the values of such parameters as the initial concentration and the coefficient of non-conservativeness. With long-term interaction, the speed of self-cleaning of the river plays a significant role. At a low level of self-purification of the river, the concentration of substances in the river almost reaches the maximum permissible level. The deterioration of the environmental situation leads to losses on the part of the Host. The reverse situation allows us to continue cooperation in the future, while receiving a greater gain. Also, the winnings of the subjects significantly depend on the volume of investments.

Web enablement of a Water Safety Plan via the municipal-based electronic Water Quality Management System (eWQMS)

2011 ◽  
Vol 11 (5) ◽  
pp. 568-577
Author(s):  
P. F. de Souza ◽  
J. E. Burgess ◽  
M. Swart ◽  
V. Naidoo ◽  
A. Blanckenberg
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Quality Management ◽  
Management System ◽  
Quality Management System ◽  
Water Quality Management ◽  
Water Services ◽  
Water Safety ◽  
Safety Plan ◽  
Water Safety Plan

Despite a good legislative framework, South Africa faces significant challenges in the sustainable provision of adequate and safe water services. To improve the situation, South Africa's Department of Water Affairs (DWA) and other water sector partners undertook initiatives to assist municipalities with operation and management of water services. By way of example, in 2006, the municipal engineering oriented electronic Water Quality Management System (eWQMS) was implemented, providing municipalities with a platform for loading drinking water quality data and tracking performance of key water services management functions. Following this in 2008, DWA introduced an incentive-based regulatory programme, Blue Drop Certification (BDC), and the associated regulatory drinking water quality information system, the Blue Drop System (BDS) which is, for example, populated with data loaded by municipalities onto eWQMS. An integral part of BDC is the development of Water Safety Plans (WSPs). Due to the challenges faced by municipalities in developing WSPs, the Water Research Commission (WRC) saw a need to assist municipalities, and subsequently a generic Water Safety Plan for Small Community Water Supplies was developed. The WRC also saw the need to develop an easy-to-use WSP tool for municipalities. The eWQMS was selected as the platform for making the tool available. This paper presents the development of a web-enabled WSP tool on the eWQMS which ultimately will provide the information to the BDS.

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