water quality Articles
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Water Quality and Purity
Even an advanced country like the United States is facing significant water problems relating to availability, purity, and quality. Over 700 chemicals have been detected in U.S. drinking water as it comes out of the tap. EPA has classified 129 of them as being particularly dangerous. Drinking bottled water does not assure the absence of ...
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Recycled Water Quality
Matching recycled water quality to beneficial uses requires an understanding of health and environmental requirements. Measures to achieve appropriate recycled water quality are determined firstly by treatment. The degree of treatment depends in part on the source and the hydraulic and biochemical characters of the wastewater. Overall recycled water outcomes may also be controlled ...
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Drinking Water Quality
The quality of drinking-water is a powerful environmental determinant of health. Drinking-water quality management has been a key pillar of primary prevention for over one-and-a-half centuries and it continues to be the foundation for the prevention and control of waterborne diseases. Water is essential for life, but it can and does transmit disease in countries in all continents – from the ...
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Water Quality Modelling
Water quality modelling involves the prediction of water pollution using mathematical simulation techniques. A typical water quality model consists of a collection of formulations representing physical mechanisms that determine position and momentum of pollutants in a water body. Models are available for individual components of the hydrological system such as surface runoff; there also exist ...
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Water Quality - UN Water Policy Brief
This policy brief is a collaborative output of UN-Water members and partners directed at practitioners, policymakers and decision-makers in water resource management and other relevant sectors. The policy brief outlines the challenges and trends, drivers and impacts related to water quality. It also presents four strategies that form the basis of policy solutions. It concludes by detailing a ...
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Drinking Water Quality
Drinking water or potable water is water of sufficiently high quality that it can be consumed or used without risk of immediate or long term harm. In most developed countries, the water supplied to households, commerce and industry is all of drinking water standard, even though only a very small proportion is actually consumed or used in food preparation. Over large parts of the world, humans ...
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Ecological Water Quality - Water Treatment and Reuse
This book attempts to cover various issues of water quality in the fields of Hydroecology and Hydrobiology and present various Water Treatment Technologies. Sustainable choices of water use that prevent water quality problems aiming at the protection of available water resources and the enhancement of the aquatic ecosystems should be our main target. Continue reading the full ...
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Water quality prediction using machine learning methods
This study investigates the performance of artificial intelligence techniques including artificial neural network (ANN), group method of data handling (GMDH) and support vector machine (SVM) for predicting water quality components of Tireh River located in the southwest of Iran. To develop the ANN and SVM, different types of transfer and kernel functions were tested, respectively. Reviewing ...
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Water quality measurement extreme
Background The characteristics of the Rio Tinto in the south-west of Spain, near Sevilla, are his ruby colour and the extremely sour pH-value between 0 and 2 pH-units. The river carries a mixture between poisonous heavy metals like copper, nickel, arsenic, iron and cadmium, dissolved in high-percent sulphuric acid. It’s not proved where these unusual conditions come from. As per current ...
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Meeting water quality specifications for 300 mm processing
Abstract This paper reviews the historical ultrapure water specifications and compares them to the specifications for state of the art 300 mm manufacturing. As the design rule has evolved to 0.13 μm, the ultrapure water specifications have made similar evolutions. This paper discusses these evolutions and focuses on the state of the art technologies that are available to meet these ...
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Water quality characteristics of different industrial wastewater by Delphi water quality index method
Water quality index (WQI) is a single value numerical expression, which can evaluate the quality of given water body at particular position and time. Five different industrial wastewaters WQI are formulated by Delphi process (before and after treatment) and the results obtained for each samples are reported. It has been observed that the individual parameters vary quite widely whereas when it is ...
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Water Quality Monitoring and Assessment
The book attempts to covers the main fields of water quality issues presenting case studies in various countries concerning the physicochemical characteristics of surface and groundwaters and possible pollution sources as well as methods and tools for the evaluation of water quality status. This book is divided into two sections: Statistical Analysis of Water Quality Data;Water Quality Monitoring ...
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Do Septic Systems Affect Water Quality?
Around 25% of homes in the United States are not connected to the community sewage systems and have a separate septic system installed. The Environmental Protection Agency has found that at least 48.5% of homes in the State of North Carolina also have a septic system installed. For more information check out this blog: http://www.lakenormanseptic.com/do-septic-systems-affect-water-quality/ ...
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Harnessing Water Quality Sensors for Improved Resource Management
水是一种重要的资源,在维持生命和支持各种经济活动方面发挥着至关重要的作用。然而,由于污染、工业活动和气候变化,水资源的质量不断受到威胁。为了应对这些挑战并确保水资源的可持续管理,利用水质传感器已成为一种有价值的工具。本文讨论了水质传感器在改善资源管理方面的作用,并探讨了它们在监测和维持水质方面的应用。 利用水质传感器改善资源管理 3 引言 水质传感器是测量和监测各种参数的设备,这些参数决定了水资源的健康和适宜性。这些传感器提供有关水体中pH值、温度、溶解氧、浊度和营养浓度等参数的实时数据。通过收集准确及时的数据,水质传感器可实现高效的决策和有效的资源管理策略。 水质传感器的应用 2.1 环境监测 水质传感器 广泛用于环境监测 ...
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An integrated model for simulating and diagnosing the water quality based on the system dynamics and Bayesian network
An integrated model for simulating and diagnosing water quality based on the system dynamics and Bayesian network (BN) is presented in the paper. The research aims to connect water monitoring downstream with outlet management upstream in order to present an efficiency outlet management strategy. The integrated model was built from two components: the system dynamics were used to simulate the ...
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Organisational arrangements and drinking water quality
This paper discusses the findings of a research project which explored the impact of varying organisational arrangements on drinking water quality in England and Wales, and the Republic of Ireland. It is established that drinking water quality has been of a consistently higher standard in England and Wales in comparison with the Republic of Ireland. It is also demonstrated that the associated ...
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European bathing water quality in 2012
Every year, millions of Europeans take advantage of the continent's wonderful selection of beaches, rivers, and lakes for a relaxing holiday or a day out. It is vitally important that they know the quality of the water they are swimming in, and that they do not jeopardise their health. The European Environment Agency (EEA) and the European Commission hope that this year's bathing water report ...
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Water quality perceptions and willingness to pay for clean water in peri-urban Cambodian communities
This paper studies household demand for improved water quality in peri-urban Cambodia, with particular attention paid to the influence of water quality on willingness to pay (WTP). Utilizing data from 915 household surveys, we analyze responses to a contingent valuation scenario using multivariate logit regression techniques that account for subjective perceptions of water quality. We estimate ...
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