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This is a full set of PowerPoint lectures for a course in Water Technology currently given at Trinity College, University of Dublin by professor N.F. Gray. The lectures cover all aspects of water and wastewater treatment and are available for use to lecturers or those interested in the subject. The lecture series is to be used in conjunction with the new textbook ?Water Science and Technology? (4th edition) published by CRC Press in 2017. Lecture 1 is an introduction to the water industry and covers the structure of the water industry, the water services cycle, water governance and the Drinking Water Directive. Water pricing, consumption, reuse and conservation are covered as is water demand management, the water poverty threshold and water stress threshold. The lecture include active links and structured reading. ; 1

The problem of water saving for modern human civilization is becoming more and more important. In general, there is a tendency towards the dynamics of an increase in the shortage of fresh water in the world. At the same time, entire states have existed and developed in conditions of water shortage for many decades and even centuries. In this regard, water saving technologies, and renewal, development are becoming an increasingly urgent problem. In this regard, modern scientific and technological progress is becoming the most important factor in the development of water saving technologies. Scientific and technological progress also makes it possible to develop a water saving strategy. The article presents the results of studies devoted to water-saving irrigation technology on steep slopes and specifies the elements of irrigation technique for discrete irrigation in the south of Uzbekistan.

The availability of fresh water affects public health and living standards around the globe, yet water resources are being rapidly depleted by unsustainable human activities. Strained freshwater resources will perpetuate unless the public is made aware of the severity of water scarcity issues. Audience segmentation, used frequently by environmental communicators to target unreached groups, is a social marketing strategy that segments audiences with shared characteristics to inform the development of effective communication messages. The purpose of this study was to determine characteristics of audience segments based on their level of water conservation behaviors. An online survey of the United States general public captured levels of water conservation behaviors based on how consumers prepare to vote on policy and intent to engage in water conservation behaviors. Cluster analysis resulted in two audience segments: lower water conservation and higher water conservation. Further analysis indicated significant demographic differences between the segments. The lower water segment presented less education, more moderate or conservative political beliefs, and lower family income levels than the higher water segment. Communication messages for the lower water segment should align with these characteristics, including using less scientific verbiage, linking moderate and conservative perspectives with water conservation, and emphasizing economic gain/loss.

Although it is widely recognized that reducing freshwater consumption is of critical importance, generating interest in industrial water reduction programs can be hindered for a variety of reasons. These include the low cost of water, greater focus on water use in other sectors such as the agriculture and residential sectors, high levels of unbilled and/or unregulated self-supplied water use in industry, and lack of water metering and tracking capabilities at industrial facilities. However, there are many additional components to the resource savings associated with reducing site water use beyond the water savings alone, such as reductions in energy consumption, greenhouse gas emissions, treatment chemicals, and impact on the local watershed. Understanding and quantifying these additional resource savings can expand the community of businesses, NGOs, government agencies, and researchers with a vested interest in water reduction. This paper will develop a methodology for evaluating the embedded energy consumption associated with water use at an industrial facility. The methodology developed will use available data and references to evaluate the energy consumption associated with water supply and wastewater treatment outside of a facility's fence line for various water sources. It will also include a framework for evaluating the energy consumption associated with water use within a facility's fence line. The methodology will develop a more complete picture of the total resource savings associated with water reduction efforts and allow industrial water reduction programs to assess the energy and CO2 savings associated with their efforts.

This paper examines the effects of the expansion of the water network in urban shantytowns in Argentina. We find large reductions in the presence, frequency and severity of diarrhoea episodes among children reached by network expansions relative to a control group. Moreover, expanded connections induce savings in water expenditures, as these families are able to substitute piped water for more expensive and distant sources of water provision. These health and savings effects are also important for households that previously had clandestine self‐connections to the water network, which were free but of low quality.

Until now, as a way of reducing greenhouse gas emissions from Japanese homes, the emphasis has been on reduction of energy consumption for air-conditioning and lighting. In recent years, there has been progress in CO2 emission reduction through research into the water-saving performance of bathroom fixtures such as toilets and showers. Simulations have shown that CO2 emissions associated with water consumption in Japanese homes can be reduced by 25% (1% of Japan's total CO2 emissions) by 2020 through the adoption of the use of water-saving fixtures. In response to this finding, a program to promote the replacement of current fixtures with water-saving toilet bowls and thermally insulated bathtubs has been added to the Government of Japan's energy-saving policy. Furthermore, CO2 emission reduction through widespread use of water-saving fixtures has been adopted by the domestic credit system promoted by the Government of Japan as a way of achieving CO2 emission-reduction targets ; application of this credit system has also begun. As part of a bilateral offset credit mechanism promoted by the Government of Japan, research to evaluate the CO2 reduction potential of the adoption of water-saving fixtures has been done in the city of Dalian, in China.