Search results

The purpose of this paper is to present a case study on how drinking water consumption could be potentially reduced by the introduction of dual water distribution networks. Since water of this quality is required only for drinking, cooking, bathing, and washing, delivering such water for uses that require non‐drinking water quality represents a tremendous waste of water and energy, and contributes to environmental pollution.

An overview of dual distribution networks in several countries is presented. Kuwait, in which 86 percent of the freshwater network has a parallel brackish water network, is the leader in this field, with brackish water used for a range of outdoor activities. The residential sector is the major consumer of freshwater in Kuwait and the control of demand in this sector will be a key factor in curbing the overall demand, which without any demand management measures is expected to quadruple by 2025. Computer modeling based on existing water use statistics and the proposed phasing‐in of a dual distribution network for indoor use in households has been undertaken to determine how the large quantities of reclaimed can be used to reduce drinking water consumption.

The paper presents a modeling exercise that demonstrates that by using reverse osmosis (RO) treated wastewater for toilet flushing and watering the gardens, water consumption demand can be stabilized at present levels over a 20‐year period.

The paper concludes that with foresight and long‐term planning it is feasible to implement a dual water supply network in a major city, on a scale which may lead to saving up to 25 percent of drinking quality water on top of other traditional water conservation measures.

Provides a summary of recycled water use in California, illustrating the evolution of its application from individual projects for nearby users, to city‐wide and district programs. Presents three detailed case studies of recent water recycling projects: the West Basin Water Recycling project in Los Angeles County, the South Bay Water Recycling project in Santa Clara County, and several projects in Marin County. Barriers to recycled water projects include the cost, institutional barriers that separate water supply and wastewater functions, slow regulatory response in permitting, recognizing new technology and expended uses, and educating stakeholders. From the case studies, common elements to successful implementation demonstrate the importance of working with numerous stakeholders throughout the process and addressing their concerns, creating new institutional partnerships, educating stakeholders to bring actors together, market services, and engender support, acquiring financial assistance and providing incentives and, finally, relying on large volume users to support a more cost‐effective design.

The purpose of this paper is to provide a review of the technology, design and application of rainwater harvesting (RWH) systems in a UK context and identify areas of research and development.

A comprehensive range of literature from 1978‐2010 is reviewed and divided into the following sections: history, application in developed countries, benefits of RWH, system categories and components, storage capacity, rainwater quality and factors influencing the use of RWH systems.

This paper provides a useful source of information relating to the potential benefits of RWH systems, different types of system and components used to supply non potable water. To ensure the potential of RWH systems in the UK is realized, an integrated approach to their application is required. This may improve the financial viability of these systems and sustainability credentials but requires further research.

It is not an exhaustive list of publications but attempts to draw on major sources of literature which catalogue the development and design of RWH systems. Current sources of literature are also identified which identify various factors influencing the future development and application of rainwater systems.

The paper provides practitioners with an initial basis for evaluating or undertaking the initial design of RWH systems.

The study provides historical context for the recent and ongoing development of RWH. In particular areas of further research and development are identified to ensure the potential of RWH systems are realized in the future.

In addition to agriculture, energy production, and industries, potable water plays a significant role in many fields, further increasing the demand for potable water. Purification and desalination play a major role in meeting the need for clean drinking water. Clean water is necessary in different areas, such as agriculture, industry, food industries, energy generation and in everyday chores.

The authors have used the different search engines like Google Scholar, Web of Science, Scopus and PubMed to find the relevant articles and prepared this mini review.

The various stages of water purification include coagulation and flocculation, coagulation, sedimentation and disinfection, which have been discussed in this mini review. Using nanotechnology in wastewater purification plants can minimize the cost of wastewater treatment plants by combining several conventional procedures into a single package.

In society, we need to avail clean water to meet our everyday, industrial and agricultural needs. Purification of grey water can meet the clean water scarcity and make the environment sustainable.

This mini review will encourage the researchers to find out ways in water remediation to meet the need of pure water in our planet and maintain sustainability.

The purpose of this paper is to examine the climate change implications for both rainfall and saline intrusion in ground water, which could directly threaten both the tourism industry and other local livelihoods in the Caribbean. Water shortages will be particularly critical in the locations that are already water‐stressed; at or near the limits of their available supplies.

The paper focuses on Barbados as the island exhibits four critical factors that make it particularly sensitive and potentially vulnerable to water shortages. Barbados is relatively small and flat, and has limited water flow. Second, it is the most densely populated country in the Caribbean. Third, the economy is primarily driven by tourism, and has prospered as a result; Fourth, Barbados is characterized as “absolute water scarce” on the Falkenmark scale because of a per capita availability of freshwater per year of less than 500 cubic meters.

The paper observes that Barbados has a water availability of just 306 cubic metres per capita per year, which makes Barbados the 15th most water‐scarce nation in the world. Thus, Barbados is critically dependent on a water‐intensive industry, has limited options to expand the supply of the key resource, and now finds that the availability of this key resource might decline in future as a result of climate change.

The paper provides data, case studies and analysis to demonstrate the significant threat to tourism from water shortages relating to climate change.

Water conservationists have been promoting a hierarchy of measures to preserve water resources in the face of decreasing freshwater availability in the world. However, applicability of water hierarchy to the construction industry is yet to be investigated. To fill this knowledge gap, the purpose of this paper is to investigate water usage, water use efficiency, and conservation measures relevant to the construction operations.

A triangulation-based mixed-methods approach was adopted for the collection and analysis of data. First, four case studies were carried out to explore the current practices and the possibilities of applying the water hierarchy to the construction operations. This was followed by a questionnaire survey, administered among construction professionals to obtain their views and to verify the findings of case studies.

Strategies such as reuse and recycling were found to be less applicable and least preferred by the construction professionals compared to reduce, replace, and eliminate. Based on the research findings, three enabling measures, namely, regulation, responsibility, and reward, were found to enhance the effectiveness of these conservation strategies.

Knowledge on preferences of different water conservation measures among the construction professionals and their effectiveness on construction site could help the construction companies to device strategies to mitigate water wastage and enhance water use efficiency. It could also help policy-makers to develop guidelines that would have higher probability of acceptance among construction stakeholders.

The study proposes an extended water hierarchy (3R.6R) by integrating three enabling measures discussed above for the construction project sites.

Outlines the history and uses of copper tubing and its position in the modern building industry. Discusses its various designations and tempers, its strength and ductility, corrosion resistance, compatibility with other plumbing materials, suitability for use with potable water, its potential as a bacteriostat, its biofouling resistance and its availability in a range of sizes. Notes its position as a guaranteed British Standard quality product, and assesses the impact of Water Bylaws, Building Regulations and the British Standard Code of Practice on Water Supply on its use in building today. Explores other current and future applications of copper tube and extols its properties for health.

Water, as a major and vital component of food manufacture, is discussed in terms of the food industry's responsibility for its quality, in various types of establishment.

This study provides details on the development of a qualitative approach to the assessment of public evaluation of water recycling schemes. The approach involved the presentation to a small group of information and audiovisual material on the water cycle and wastewater treatment followed by the use of focus group style questioning to elicit discussion and questioning of the material. Qualitative analysis, based on a discursive method of evaluation, was used to assess dialogue in the groups, and it was concluded that participants used the context of the local scheme to assess their use of recycled water and consider extending the application of recycled water to more personal uses. Participants also tended to use item evaluation rather than category evaluation of water recycling. Agreement responses within workshops also influenced the discourse of evaluation of water reuse.