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The scientific evidence contained in the three volumes of the 6th IPCC report (AR6), published between August 2021 and April 2022, are another reminder of the urgent need to respect the 2015 Paris Agreement. 195 countries agreed to the goal of limiting long-term global temperature increase to "well below 2°C" compared to pre-industrial levels and to pursue efforts to limit the increase to 1.5°C by massively reducing their emissions of carbon dioxide and other greenhouse gases (GHGs). Water and climate questions are usually addressed from the perspective of adaptation to climate change. For urban water services the mitigation aspect has been less studied up till now. These considerations fit into the broader context of the interdependence of energy and water (Water-Energy Nexus). This report approaches the question from the angle of energy use in the water sector rather than the better-known water requirements for the energy sector. Reducing GHG emissions in urban water management requires reducing both fossil energy requirements and direct emissions of nitrous oxide and methane. Finally, it must be said that the need to reduce the GHG emissions of water and sanitation services goes with the growing demand for water. It should increase by 50% between now and 2030 worldwide due to the combined effects of population growth, economic development, and the shift in consumer patterns. This synthetic report aims to provide an overview of possible levers to reduce the greenhouse gas emissions of water and sanitation services and provides an analysis of how adaptation measures can embrace this low-carbon approach.
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'This is surely the most impressive and important publication to come out of the UN system for many years.'Peter Adamson, founder, New Internationalist, and author and researcher of UNICEF's The State of the World's Children from 1980 to 1995The world's governments agreed at the Millennium Summit to halve, by 2015, the number of people who lack access to safe water. With rapidly growing urban populations the challenge is immense.Water and Sanitation in the World's Cities is a comprehensive and authoritative assessment of the problems and how they can be addressed. This influential publication
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With increased commitment from the international community to reduce greenhouse gas (GHG) emissions from all sectors in accordance with the Paris Agreement, the water sector has never felt the pressure it is now under to transition to a low-carbon water management model. This requires reducing GHG emissions from grid-energy consumption (Scope 2 emissions), which is straightforward; however, it also requires reducing Scope 1 emissions, which include nitrous oxide and methane emissions, predominantly from wastewater handling and treatment. The pathways and factors leading to biological nitrous oxide and methane formation and emissions from wastewater are highly complex and site-specific. Good emission factors for estimating the Scope 1 emissions are lacking, water utilities have little experience in directly measuring these emissions, and the mathematical modelling of these emissions is challenging. Therefore, this book aims to help the water sector address the Scope 1 emissions by breaking down their pathways and influencing factors, and providing guidance on both the use of emission factors, and performing direct measurements of nitrous oxide and methane emissions from sewers and wastewater treatment plants. The book also dives into the mathematical modelling for predicting these emissions and provides guidance on the use of different mathematical models based upon your conditions, as well as an introduction to alternative modelling methods, including metabolic, data-driven, and AI methods. Finally, the book includes guidance on using the modelling tools for assessing different operating strategies and identifying promising mitigation actions. A must have book for anyone needing to understand, account for, and reduce water utility Scope 1 emissions.
Mathematical models. --- Municipal water supply --- Greenhouse gases. --- Law and legislation.
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This document reports some background information on the extent and severity of the 1987-91 California drought, evaluates existing work on the economic effects of the drought, and presents an agenda for future research to make an overall estimate of the economic costs of the drought in urban areas. It recommends a survey of urban water agencies to identify drought management policies and the resulting cutbacks in water use by various customer classes; to identify an estimate of economic losses incurred by residential customers using demand curve estimates or contingent valuation methodology; to identify contingent valuation surveys of commercial sectors hard-hit by the drought, such as nurseries and landscape contractors; and to identify a brief assessment of the industrial sector, which was mostly protected from cutbacks that would have resulted in lost output or jobs. This research was partially sponsored by California Urban Water Agencies, a nonprofit, nonpartisan organization of 11 urban wholesale and retail water agencies.
Droughts --- Water resources development --- Municipal water supply --- Economic aspects --- Planning.
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Municipal water supply --- Urban sanitation --- United Nations Human Settlements Programme. --- Evaluation.
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Water and its improved governance are critical for economic growth, social inclusiveness and environmental sustainability. Three years after the adoption of the OECD Water Governance Principles, this report takes stock of their use and dissemination. It provides a water governance indicator framework and a set of evolving practices for bench-learning, building on lessons learned from different countries and contexts. Based on an extensive bottom up and multi-stakeholder process within the OECD Water Governance Initiative (WGI), these tools are conceived of as voluntary methodologies to be carried out at country, region, basin and/or city levels to improve water policies. The indicator framework is composed of a traffic light system based on 36 input and process indicators and a checklist with questions on a number of more specific governance conditions. The framework concludes with an action plan to help prioritise steps towards better design and implementation of water policies.
Water-supply --- Municipal water supply --- Government policy --- Management. --- Government policy. --- Availability, Water --- Water availability --- Water resources --- Natural resources --- Public utilities --- Water resources development --- Water utilities --- Cities and towns --- Urban water --- Water, Municipal --- Water, Urban --- Municipal engineering
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In the former Soviet Union, extensive networks were constructed to supply urban populations with clean, safe water. However, the networks were not well designed and this resulted in low quality water services and high operation and maintenance costs. With the dissolution of the Soviet Union in 1991, the condition of water infrastructure deteriorated more dramatically following sharp decreases in public budgets and the continued tradition of providing water services virtually free of charge. Without urgent action, the quality of services will continue to worsen and, in some of the New Independent States (NIS) of the former Soviet Union, may even collapse, with serious consequences for human health and economic activity. This volume analyses the causes underlying this dire situation and presents recommendations for addressing it which were adopted at a meeting of Economic/Finance and Environment Ministers held in Almaty, Kazakhstan, in October 2000. The meeting was organized within the framework of the EAP Task Force, with its Secretariat at OECD, and involved key stakeholders from the governmental and non-governmental sectors. The EAP Task Force will implement a focused programme of work guided by the main recommendations agreed by participants.
Municipal water supply -- Former Soviet republics -- Management. --- Water quality management -- Former Soviet republics. --- Water-supply -- Former Soviet republics -- Management. --- Water-supply --- Water quality management --- Municipal water supply --- Civil & Environmental Engineering --- Engineering & Applied Sciences --- Environmental Engineering --- Management --- Cities and towns --- Urban water --- Water, Municipal --- Water, Urban --- Water quality --- Water quality control --- Availability, Water --- Water availability --- Water resources --- Municipal engineering --- Sewage disposal --- Water conservation --- Natural resources --- Public utilities --- Water resources development --- Water utilities --- Management. --- Eau --- Approvisionnement --- Gestion --- Qualité --- Approvisionnement urbain --- Ecology
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water treatment --- wastewater treatment --- drinking water --- water distribution networks --- desalination --- rehabilitation --- Water --- Sewage --- Municipal water supply --- Purification --- Distribution --- Hydrology --- Cities and towns --- Urban water --- Water, Municipal --- Water, Urban --- Municipal engineering --- Water-supply --- Eau --- Eaux usées --- Approvisionnement urbain --- Épuration --- Water. --- Sewage. --- Municipal water supply. --- Distribution. --- Purification. --- Domestic effluent --- Domestic sewage --- Domestic wastewater --- Effluent (Sewage) --- Industrial effluent --- Industrial wastewater --- Sewage effluent --- Waste water --- Waste waters --- Wastewater --- Wastewaters --- Sewerage --- Effluent treatment --- Purification of sewage --- Sewage treatment --- Water treatment --- Water-supply engineering --- Hydraulics --- Disinfection
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Rainwater tank systems have been widely adopted across the world to provide a safe local source of water in underdeveloped rural areas, and as a substitution for mains water for non potable end uses in water stressed urban areas. They also provide flood control in monsoonal climates like Korea or in combined sewer systems like in Germany. The importance of these systems in cities has grown, as water managers seek to provide a range of decentralised solutions to supply constraints of current water supply systems, whilst reducing the impact of urban development on the natural environment, and increasing resilience to climate change. Rainwater Tank Systems for Urban Water Supply is based on a comprehensive, multi-million dollar research program that was undertaken in South East Queensland (SEQ) Australia in response to the Millennium drought when the water supply level in the regions drinking water dams dropped to 17% in July 2007 and the area came close to running out of water.
Water harvesting. --- Rainwater. --- Tanks. --- Cisterns. --- Municipal water supply. --- Harvesting, Water --- Precipitation trapping --- Rainwater catchment --- Rainwater harvesting --- Runoff collection --- Water conservation --- Water-supply --- Rainwater --- Runoff irrigation --- Cities and towns --- Urban water --- Water, Municipal --- Water, Urban --- Municipal engineering --- Reservoirs --- Wells --- Water tanks --- Containers --- Shells (Engineering) --- Pressure vessels --- Rain water --- Rain-water (Water-supply) --- Water --- Water harvesting --- Environmental Sciences --- Water resources --- Water supply
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Wasser ist eine globale Ressource für heutige Gesellschaften – Wasser war eine globale Ressource vormoderner Gesellschaften. Die manigfaltigen unterschiedlicher Wassersysteme für Prozesse der Urbanisierung und das urbane Leben in der Antike und dem Mittelalter ist bislang kaum erforscht. Die zahlreichen Beiträge dieses Bandes fragen nach der grundlegenden kulturellen Bedeutung von Wasser ( bzw. power of water) in der Stadt und Wasser für die Stadt aus unterschiedlichen Perspektiven. Symbolische, ästhetische oder kultische Aspekte werden ebenso thematisiert wie die Rolle von Wasser in Politik, Gesellschaft oder Wirtschaft und dem alltäglichen Handeln, aber auch in Stadtplanungsprozessen oder städtischen Teilräumen. Nicht zuletzt stellen die Gefahren von verschmutzten Wasser oder Überschwemmungen die städtische Gesellschaft vor Herausforderungen. Die Beiträge diesen Band lenken den Blick auf die komplexen und vielfältigen Beziehungen zwischen Wasser und Menschen. Das Sammelwerk präsentiert die Ergebnisse einer internationalen Tagung in Kiel 2018. Es wendet sich gleichermaßen an Leser aus den altertumskundlichen wie mediävistischen Fächern und darüberhinaus an alle Interessierten, die sich über die Vielfalt von Wassersystemen im Stadtraum der Antike und des Mittelalters informieren möchten. Water is a global resource for modern societies - and water was a global resource for pre-modern societies. The many different water systems serving processes of urbanisation and urban life in ancient times and the Middle Ages have hardly been researched until now. The numerous contributions to this volume pose questions such as what the basic cultural significance of water was, the power of water, in the town and for the town, from different points of view. Symbolic, aesthetic, and cult aspects are taken up, as is the role of water in politics, society, and economy, in daily life, but also in processes of urban planning or in urban neighbourhoods. Not least, the dangers of polluted water or of flooding presented a challenge to urban society. The contributions in this volume draw attention to the complex, manifold relations between water and human beings. This collection presents the results of an international conference in Kiel in 2018. It is directed towards both scholars in ancient and mediaeval studies and all those interested in the diversity of water systems in urban space in ancient and mediaeval times.
Stadtentwicklung. --- Urbanistik. --- Urbanity. --- Wasser. --- Water. --- HISTORY / Ancient / Greece. --- City planning --- Municipal water supply. --- History --- Cities and towns --- Urban water --- Water, Municipal --- Water, Urban --- Municipal engineering --- Water-supply --- Civic planning --- Land use, Urban --- Model cities --- Redevelopment, Urban --- Slum clearance --- Town planning --- Urban design --- Urban development --- Urban planning --- Land use --- Planning --- Art, Municipal --- Civic improvement --- Regional planning --- Urban policy --- Urban renewal --- Government policy --- Management
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