Clustering techniques are used to identify groups of watersheds which have similar flood characteristics. This book, the first of its kind, is a comprehensive reference on how to use these techniques for regional flood frequency analysis. It provides a detailed account of several recently developed clustering techniques, including those based on fuzzy set theory. It also brings together formerly scattered research findings on the application of clustering techniques to RFFA.
In the quest to reduce costs and improve the efficiency of water and wastewater services, many communities in the United States are exploring the potential advantages of privatization of those services. Unlike other utility services, local governments have generally assumed responsibility for providing water services. Privatization of such services can include the outright sale of system assets, or various forms of public-private partnershipsâ€"from the simple provision of supplies and services, to private design construction and operation of treatment plants and distribution systems. Many factors are contributing to the growing interest in the privatization of water services. Higher operating costs, more stringent federal water quality and waste effluent standards, greater customer demands for quality and reliability, and an aging water delivery and wastewater collection and treatment infrastructure are all challenging municipalities that may be short of funds or technical capabilities. For municipalities with limited capacities to meet these challenges, privatization can be a viable alternative. Privatization of Water Services evaluates the fiscal and policy implications of privatization, scenarios in which privatization works best, and the efficiencies that may be gained by contracting with private water utilities.
"Wetlands" has become a hot word in the current environmental debate. But what does it signify? In 1991, proposed changes in the legal definities of wetlands stirred controversy and focused attention on the scientific and economic aspects of their management. This volume explores how to define wetlands. The committee--whose members were drawn from academia, government, business, and the environmental community--builds a rational, scientific basis for delineating wetlands in the landscape and offers recommendations for further action. Wetlands also discusses the diverse hydrological and ecological functions of wetlands, and makes recommendations concerning so-called controversial areas such as permafrost wetlands, riparian ecosystems, irregularly flooded sites, and agricultural wetlands. It presents criteria for identifying wetlands and explores the problems of applying those criteria when there are seasonal changes in water levels. This comprehensive and practical volume will be of interest to environmental scientists and advocates, hydrologists, policymakers, regulators, faculty, researchers, and students of environmental studies.
Small communities violate federal requirements for safe drinking water as much as three times more often than cities. Yet these communities often cannot afford to improve their water service. Safe Water From Every Tap reviews the risks of violating drinking water standards and discusses options for improving water service in small communities. Included are detailed reviews of a wide range of technologies appropriate for treating drinking water in small communities. The book also presents a variety of institutional options for improving the management efficiency and financial stability of water systems.
Managing Water Demand provides a comprehensive account of the tools used to manage water demand in the MENA region. The vast arid and semi-arid regions of the Middle East and North Africa region (MENA) constitute 85% of the region's land area and are home to approximately 60% of the region's population. Limited water resources pose severe constraints on people's economic and social progress, testing their resilience and threatening their livelihoods. Rainfall is not only scarce and unpredictable, but the region is also subject to frequent and severe droughts. Available surface water is declining and the over-pumping of groundwater beyond natural recharge rates is occurring, lowering the water table and causing an increase in groundwater salinity and ecological degradation. Water Demand Management (WDM) is about governance and tools that motivate people and their activities to regulate the amount and manner in which they access, use and dispose of water to alleviate pressure on freshwater supplies. It is also about protecting water quality. The development and promotion of such WDM practices, primarily for governments in the Middle East and North Africa (MENA) region, have constituted the core objectives supported by Canada's International Development Research Centre (IDRC) and its partners through the Water Demand Management Forums. Managing Water Demand provides a comprehensive account of the tools used to manage water demand in the MENA region. A critical review is presented of the efficacy of WDM techniques in the areas of wastewater reuse, water valuation, public-private partnerships and decentralization, and participatory irrigation management. This book will provide some of the necessary knowledge required to further promote WDM in the MENA region, while providing insight into the work required for much needed change to improve water governance.
