Dealing With The Complex Interrelation Of Intermittent Supply And Water Losses
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| Author | : Bambos Charalambous |
| Publisher | : IWA Publishing |
| Total Pages | : 162 |
| Release | : 2017-08-15 |
| Genre | : Science |
| ISBN | : 1780407068 |
The book provides a scientific approach into appraising Intermittent Water Supply (IWS) on a global scale through the analysis of available information and data based on a structured methodology for estimating the population affected by IWS worldwide both by country and by geographical regions. The root causes and the implications of IWS are dealt with in a concise manner providing a detailed account of the reasons for resistance to change towards 24x7 supply. A major contribution of the book is in providing an understanding of water losses in the context of IWS as well as the related difficulties in leakage detection and metering under such conditions. A methodology is presented for transitioning from IWS to continuous supply covering technical, social and communication issues which are considered of paramount importance for a successful transition. Relevant case studies from across the globe are included in the book to provide evidence based information and data relating to the many and diverse challenges faced daily by water utilities operating their networks under IWS.
| Author | : Mirjam Blokker |
| Publisher | : MDPI |
| Total Pages | : 146 |
| Release | : 2020-12-02 |
| Genre | : Science |
| ISBN | : 3039360124 |
Safe drinking water is paramount for the health and wellbeing of all human populations. Water is extracted from surface and groundwater sources and treated to comply with drinking water standards. The water is then circulated through the drinking water distribution system (DWDS). Within the DWDS, water quality can deteriorate due to microbiological growth, chemical reactions, interactions with ageing and deteriorating infrastructure, and through maintenance and repair activities. Some DWDS actions may serve to improve water quality; however, these can adversely impact the drinking water system and cause instances of poor water quality or disease outbreaks. We invited papers covering examinations of DWDS design and operational practices and their impact on water quality. We received papers based on practical research in real DWDS and laboratory test facilities. We also received papers on novel modelling approaches. A wide range of water quality aspects was gathered, including temperature, disinfection, bacterial communities and biofilm, (fecal) contamination and QMRA, and the effects of flushing and intermittent supply.
| Author | : Taha M. Al-Washali |
| Publisher | : CRC Press |
| Total Pages | : 197 |
| Release | : 2021-06-08 |
| Genre | : Science |
| ISBN | : 1000380432 |
Water utilities worldwide lose 128 billion cubic meters annually, causing annual monetary losses estimated at USD 40 billion. Most of these losses occur in developing countries (74%). This calls for rethinking the challenges facing water utilities in developing countries, foremost of which is the assessment of water losses in intermittent supply networks. Water loss assessment methods were originally developed in continuous supply systems, and their application in intermittently operated networks (in developing countries) is hindered by the widespread use of household water tanks and unauthorised consumption. This study provides an extensive review of existing methods and (software) tools for water loss assessment. In addition, several new methods were developed, which offer improved water loss assessment in intermittent supply. As the volume of water loss varies monthly and annually according to the amount of supplied water, this study proposes procedures to normalise the volume of water loss in order to enable water utilities to monitor and benchmark their performance on water loss management. The study also developed a novel method of estimating apparent losses using routine data of WWTP inflows, enabling future real-time monitoring of losses in networks. Different methods have also been suggested to estimate the unauthorised consumption in networks. This study found that minimum night flow analysis can still be applied in intermittent supply if an area of the network is supplied for several days. Furthermore, this study concluded that water meter performance is enhanced in intermittent supply conditions. However, continuous supply in the presence of float-valves significantly reduces the accuracy of water meters. Finally, this study provides guidance and highlights several knowledge gaps in order to improve the accuracy of water loss assessment in intermittent supply. Accurate assessment of water loss is a prerequisite for reliable leakage modelling and minimisation as well as planning for, and monitoring of water loss management in distribution networks.
| Author | : Giuseppe Pezzinga |
| Publisher | : MDPI |
| Total Pages | : 174 |
| Release | : 2019-02-28 |
| Genre | : Technology & Engineering |
| ISBN | : 3038975567 |
The Special Issue on Advances in Water Distribution Networks (WDNs) explores four important topics of research in the framework of WDNs, namely simulation and optimization modelling, topology and partitioning, water quality, and service effectiveness. With regard to the first topic, the following aspects are addressed: pressure-driven formulations, algorithms for the optimal location of control valves to minimize leakage, the benefits of water discharge prediction for the remote real time control of valves, and transients generated by pumps operating as turbines. In the context of the second topic, a topological taxonomy of WDNs is presented, and partitioning methods for the creation of district metered areas are compared. In relation to the third topic, the vulnerability to trihalomethane is assessed, and a statistical optimization model to minimize heavy metal releases is presented. Finally, the fourth topic focusses on the estimation of non-revenue water, including leakage and unauthorized consumption, and on the assessment of service under intermittent supply conditions.
| Author | : Asit K. Biswas |
| Publisher | : Springer Nature |
| Total Pages | : 393 |
| Release | : 2021-09-28 |
| Genre | : Science |
| ISBN | : 981165493X |
This book highlights the likely impacts of climate change in terms of global and national water securities, how different countries are attempting to address these complex problems and to what extent they are likely to succeed. A major global concern at present, especially after the social and economic havoc that has been caused by COVID-19 in only one year, is how we can return to earlier levels of economic development patterns and then further improve the process so that sustainable development goals are reached to the extent possible by 2030, in both developed and developing countries. Mankind is now facing two existential problems over the next several decades. These are climate change and whether the world will have access to enough water to meet all its food, energy, environment and health needs. Much of expected climate change impacts can be seen through the lens of extreme hydrological events, like droughts, floods and other extreme hydrometeorological events. Chapter 7 is available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.Chapter 12 is available open access under a Creative Commons Attribution-NonCommercial 4.0 International License via link.springer.com.
| Author | : Hassan Tolba Aboelnga |
| Publisher | : BoD – Books on Demand |
| Total Pages | : 186 |
| Release | : 2021-01-01 |
| Genre | : Technology & Engineering |
| ISBN | : 3737609608 |
Urban water security is crucial for achieving sustainable development, peace, and human health and well-being. Framing urban water security is challenging due to the complexity and uncertainty of its definition and assessment framework. Several studies have assessed water security in widely divergent ways by granting priority indicators equal weight without considering or adapting to local conditions. This dissertation develops a new urban water security definition and assessment framework applicable to water scarce cities, with a focus on Madaba, Jordan. It takes a novel and systematic approach to assessing urban water security and culminates in integrated urban water security index (IUWSI) as a diagnostic tool and guide management actions. The dissertation suggests a new working definition of urban water security based on the United Nations (UN) Sustainable Development Goal 6.1 on safe drinking water for all and the human rights on water and sanitation as follows: The dynamic capacity of water systems and stakeholders to safeguard sustainable and equitable access to water of adequate quantity and acceptable quality that is continuously, physically and legally available at an affordable cost for sustaining livelihoods, human well-being and socioeconomic development, ensuring protection against waterborne pollution and water-related disasters, and for preserving ecosystems in a climate of peace and political stability. This proposed definition captures issues at the urban level of technical, environmental and socioeconomic indicators that emphasize credibility, legitimacy and salience. The assessment framework establishes a criteria hierarchy, consisting of four main dimensions to achieve urban water security: drinking water and human well-being, ecosystem, climate change and water-related hazards and socioeconomic aspects (together, DECS). The framework enables the analysis of relationships and trade-offs between urbanization, water security and DECS indicators. The dissertation also provides a structured analysis to understand how urban water is managed in intermittent water supply system, by conducting a water balance analysis after quantifying the components of water losses in Madaba’s water distribution network. The findings showed that Madaba's non-revenue water (NRW) amounted to annual loss of about 3.5 million m3, corresponding to financial losses of 2.8 million USD to the utility, of which 1.7 million USD is the cost of real losses. The dissertation provided an intervention strategy for strengthening infrastructure resilience and reducing leakage via the infrastructure, repair, economic, awareness and pressure (IREAP) framework. The IREAP framework provides a robust strategy to shift intermittent water supply (IWS) into continuous water supply. The IUWSI highlighted the state of water security in Madaba, Jordan and identified the means of implementation to move towards achieving urban water security based on the priorities for Madaba. The drinking water and human wellbeing dimension was the most important priority, receiving a weight of 66.22%, followed by ecosystem (17.15%), socioeconomic aspects (10.18%), and climate change and water-related hazards (6.45%) dimensions. The IUWSI indicated that the urban water security in Madaba is reasonable with a score of 2.5/5 and can meet the minimum requirements in several dimensions, but nonetheless, it has many loopholes to cover. Gaps are clear in the climate change and water-related hazards, and socioeconomic dimensions with scores of 1.6/5 and 2.237/5 respectively. Additionally, specific shortcomings are found in indicators such as water availability, reliability, diversity, and public health. The IUWSI framework assists with a rational and evidence-based decision-making process, which is important for enhancing water resource management in water-scarce cities
| Author | : Auroop Ratan Ganguly |
| Publisher | : Frontiers Media SA |
| Total Pages | : 130 |
| Release | : 2022-11-14 |
| Genre | : Science |
| ISBN | : 2832505449 |
| Author | : Stuart Hamilton |
| Publisher | : IWA Publishing |
| Total Pages | : 202 |
| Release | : 2020-01-15 |
| Genre | : Science |
| ISBN | : 1789060842 |
Ageing infrastructure and declining water resources are major concerns with a growing global population. Controlling water loss has therefore become a priority for water utilities around the world. In order to improve their efficiencies, water utilities need to apply good practice in leak detection. To deal with losses in an effective manner, particularly from networks in water-scarce areas, water utility managers are increasingly turning to technology to reduce costs, increase efficiency and improve reliability. Companies that continuously invest in technology and innovation should see a positive return on investment in terms of improving daily operations and collection and analysis of network data for decision making and forward planning. Methodologies for achieving the best results to reduce water losses are continuously evolving. Water utilities and equipment manufacturers are increasingly working together to stretch the boundaries of current knowledge. This is leading to some innovative technologies and new product development to complement current methodologies. This book reflects the situation at the time of publication. This 2nd edition of the book updates practices and technologies that have been introduced or further developed in recent years in leakage detection outlining recent advancements in technology used, such as satellite aided methods in leak location, pipeline inspection with thermal diagnostics, inspection of pipelines by air using infra-red or thermal imaging cameras, Drones for leak detection activities and even sniffing dogs . In addition, it is enriched with new case studies which provide useful examples of practical applications of several leak detection practices and technologies.
| Author | : Jenia Mukherjee |
| Publisher | : Frontiers Media SA |
| Total Pages | : 148 |
| Release | : 2024-01-26 |
| Genre | : Science |
| ISBN | : 283254214X |
This Research Topic is a part of the Delft 2021: 1st Sociohydrology Conference series. To view the other sessions please follow the links below: Innovating a New Knowledge Base for Water Justice Studies: Hydrosocial, Sociohydrology, and Beyond Scale Issues in Human-Water Systems Water Resources and Human Behavior: Analysis and Modeling of Coupled Water-Human Systems Feedbacks and Coevolution Innovative Sensing, Observing, Measuring and Analysing Human-Water Data “Pluralistic water research” integrates the hydrological and the social to provide sustainable solutions to water crises. While relying upon robust quantitative modelling, sociohydrology captures crises across many waters (surface, ground and interstitial) along quantity and quality dimensions, hydrosocial unfurls power hierarchies in access to safe and required quota of water, be it for drinking or irrigation purposes. The success of engineering solutions laying out “hard” interventions such as solar powered irrigation, dams, high yielding crop varieties, water treatment plants and water distributions and purifications depend on “soft” socio-political, cultural and psychological variables like the political landscape, community behaviours and governance arrangements. How these soft parameters limit or advance the effect of hard interventions await more enhanced modelling and place-based qualitative analyses to disentangle various cause-effect pathways. While historical and process-based sociohydrology accommodates detailed temporal datasets and causal relationships across human-water systems, the hydrosocial paradigm reconciles “non-modern”, anti-hegemonic, water techniques and knowledge systems, animating local agencies within specific hydroscapes. This issue is dedicated to capture real time innovations through which water challenges have been confronted. It intends to unravel “storylines” along actionable water projects, reflecting on mediations across multiple actors and networks in specific spatio-temporal and cultural contexts, finally drawing our attention to the correlation between projected promises and actual realities. Situated at the crossroads of “boundary work”, we invite articles that will deploy a range of interdisciplinary frameworks like RANAS (Risk, Attitude, Norms, Ability, and Self-regulation), APIE (Awareness, Participation, Involvement and Engagement), HUPE (Historical Urban Political Ecology), etc. to demonstrate coupled sociohydrological and hydrosocial realties and in turn getting informed by empirical insights emanating from these actual water interventions. The final aim of the special issue is not to showcase water just actual interventions but to elicit a rigorous mapping of sustainable processes facilitating collective co-production of resilient water trajectories.
| Author | : Stuart Hamilton |
| Publisher | : IWA Publishing |
| Total Pages | : 106 |
| Release | : 2013-06-30 |
| Genre | : Science |
| ISBN | : 1780404700 |
Ageing infrastructure and declining water resources are major concerns with a growing global population. Controlling water loss has therefore become a priority for water utilities around the world. In order to improve efficiencies, water utilities need to apply good practices in leak detection. Leak Detection: Technology and Implementation assists water utilities with the development and implementation of leak detection programs. Leak detection and repair is one of the components of controlling water loss. In addition, techniques are discussed within this book and relevant case studies are presented. This book provides useful and practical information on leakage issues.
