406 research outputs found
Conflicting Visions for Water: Common Property or Private Good?
No full textDr. Peter H. Gleick gave this lecture on water, in general, with a focus on bottled water on Feb. 9, 2012, which was held in the Black Cultural Center and open to the public. Dr. Gleick is co-founder and president of the Pacific Institute for Studies in Development, Environment, and Security in Oakland, California. His research and writing address the critical connections between water and human health, the hydrologic impacts of climate change, sustainable water use, privatization and globalization, and international conflicts over water resources. Dr. Gleick is an internationally recognized water expert and was named a MacArthur Fellow in October 2003 for his work. Gleick is the author of many scientific papers and seven books, including the biennial water report, "The World's Water", and the new "Bottled and Sold: The Story Behind Our Obsession with Bottled Water".Lecture on water; Part of the Sustainability Project-sponsored graduate course "The Commons: History, Sustainability, Activism
Time travel: a history
No full textFrom the acclaimed author of The Information and Chaos, here is a mind-bending exploration of time travel: its subversive origins, its evolution in literature and science, and its influence on our understanding of time itself. The story begins at the turn of the previous century, with the young H. G. Wells writing and rewriting the fantastic tale that became his first book and an international sensation: The Time Machine. It was an era when a host of forces was converging to transmute the human understanding of time, some philosophical and some technological: the electric telegraph, the steam railroad, the discovery of buried civilizations, and the perfection of clocks. James Gleick tracks the evolution of time travel as an idea that becomes part of contemporary culture—from Marcel Proust to Doctor Who, from Jorge Luis Borges to Woody Allen. He investigates the inevitable looping paradoxes and examines the porous boundary between pulp fiction and modern physics. Finally, he delves into a temporal shift that is unsettling our own moment: the instantaneous wired world, with its all-consuming present and vanishing future
Towards a Sustainable Future: The Dynamic Adjustment Path of Irrigation Technology and Water Management in Western U.S. Agriculture
No full textTechnology adoption, Water conservation, Irrigation, Dynamic groundwater models, Sustainable agriculture, Environmental Economics and Policy, Resource /Energy Economics and Policy,
The human right to water
No full textMore than a billion people in the developing world lack safe drinking water — an amenity those in the developed world take for granted. Nearly three billion people live without access to adequate sanitation systems necessary for reducing exposure to water-related diseases. The failure of the international aid community, nations and local organizations to satisfy these basic human needs has led to substantial, unnecessary and preventable human suering. This paper argues that access to a basic water requirement is a fundamental human right implicitly and explicitly supported by international law, declarations and State practice. Governments, international aid agencies, nongovernmental organizations and local communities should work to provide all humans with a basic water requirement and to guarantee that water as a human right. By acknowledging a human right to water and expressing the willingness to meet this right for those currently deprived of it, the water community would have a useful tool for addressing one of the most fundamental failures of 20th century development. # 199
Ameliorating Effect of Chloride on Nitrite Toxicity to Freshwater Invertebrates with Different Physiology: a Comparative Study Between Amphipods and Planarians
No full textHigh nitrite concentrations in freshwater ecosystems may cause toxicity to aquatic animals. These living organisms can take nitrite up from water through their chloride cells, subsequently suffering oxidation of their respiratory pigments (hemoglobin, hemocyanin). Because NO2¿ and Cl¿ ions compete for the same active transport site, elevated chloride concentrations in the aquatic environment have the potential of reducing nitrite toxicity. Although this ameliorating effect is well documented in fish, it has been largely ignored in wild freshwater invertebrates. The aim of this study was to compare the ameliorating effect of chloride on nitrite toxicity to two species of freshwater invertebrates differing in physiology: Eulimnogammarus toletanus (amphipods) and Polycelis felina (planarians). The former species presents gills (with chloride cells) and respiratory pigments, whereas in the latter species these are absent. Test animals were exposed in triplicate for 168 h to a single nitrite concentration (5 ppm NO2-N for E. toletanus and 100 ppm NO2-N for P. felina) at four different environmental chloride concentrations (27.8, 58.3, 85.3, and 108.0 ppm Cl¿). The number of dead animals and the number of affected individuals (i.e., number of dead plus inactive invertebrates) were monitored every day. LT50 (lethal time) and ET50 (effective time) were estimated for each species and each chloride concentration. LT50 and ET50 values increased with increases in the environmental chloride concentration, mainly in amphipods. Results clearly show that the ameliorating effect of chloride on nitrite toxicity was more significant in amphipods than in planarians, likely because of the absence of gills (with chloride cells) and respiratory pigments in P. felina. Additionally, this comparative study indicates that the ecological risk assessment of nitrite in freshwater ecosystems should take into account not only the most sensitive and key species in the communities, but also chloride levels in the aquatic environmen
Pro-poor water service strategies in developing countries: promoting justice in Uganda’s urban project
No full textWater service to the urban poor presents challenges to political leaders, regulators and managers. We identify technology mixes of yard taps, public water points (with and without pre-paid meters) to meet alternative constraints, and reflecting populations served and investment requirements. Three investment scenarios have different implications for improving water access to over 400,000 citizens in Kampala. One component, pre-paid water meters, can promote social equity and institutional sustainability. If procedural justice is given as much weight as distributive justice in the selection of pro-poor programs, pre-paid meters (the ultimate cost recovery tool) can have a place in the investment plan. The study examines how public stand pipes (and a combination of other options) can meet both financial constraints and social objectives. Financial considerations cannot be wished away when seeking effective strategies for achieving the Millennium Development Goals.Water utility optimization; pro-poor connections; pre-paid meters; cost recovery; Africa; Uganda
Water Conflict Chronology Data
No full textData on water-related conflicts and violence, including water as a trigger, weapon, and casualty of conflict. Data collected and organized by the Pacific Institute, Oakland, California. It includes information on location, data, type of conflict, UN region, and sourcesTHIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV
Access of the Poor to Water Supply and Sanitation in India: Salient Concepts, Issues and Cases
No full textAccess to safe water is necessary for lives and livelihoods. In India, a mid-term assessment reveals that the country has already met its MDG (Millennium Development Goal) in terms of expanding access to water infrastructure although in the parallel subsector of sanitation progress is falling far short of the mark. In reality, most basic observations indicate that water supply coverage is not as good as the figures show while national sanitation continues to be poor even after almost six decades of efforts to eradicate open defecation. It argues that economic, technical, institutional as well as social factors constrain access to safe drinking water and proper sanitation in India for both the urban and rural poor, and that coverage figures do not reflect this restricted access. It finds that, increasingly, communities are being required to manage their own water and sanitation schemes, not just in rural areas but in urban ones as well. There are definite advantages to such an institutional arrangement if the transition to community management is carried out smoothly. Often, however, the chances of success of community management are vitiated because policy makers misunderstand and misapply three interlinked concepts that are crucial to the success of community-managed water and sanitation schemes?participation; water and sanitation burden; and project ownership. The paper concludes by clarifying these concepts and the implications they have for policy implementation in this sector.Access of the Poor to Water Supply and Sanitation in India: Salient Concepts, Issues and Cases
Assessing the costs of adapting to sea-level rise: a case study of San Francisco Bay
No full textAtmospheric concentrations of carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), tropospheric ozone (O3), chlorofluorocarbons (CFCs), and other trace gases are growing due to human activities. These trace gases are transparent to incoming solar radiation and trap outgoing infrared (heat) radiation, acting like a blanket to warm the Earth. Without any of these gases in the atmosphere, the surface of the Earth would be about 35 C (70 F) colder than at present, and life, if any could exist, would be quite different. This natural greenhouse effect is being intensified by human activities that accelerate the emission of these trace gases, such as the combustion of fossil fuels and deforestation. One of the direct consequences of climatic changes will be a rise in sea level due to the melting of land ice and the expansion of the upper layers of the ocean as they warm. This study presents a method for assessing the costs to society of protecting against an increase in sea level, and applies this method to the San Francisco Bay area -- a region of great ecological diversity, economic importance, and vulnerability. Hydrodynamic effects around the margin of San Francisco Bay are evaluated, structural options for protecting property are identified and chosen for threatened areas, and estimates of costs of protection are determined. For the purposes of this study, a one-meter sea-level rise was assumed, and all development below the future 100-year high tide elevation in San Francisco Bay was considered to be at risk. The types of shoreline protection proposed include constructing new levees and seawalls, raising existing levees and bulkheads, raising buildings, freeways and railroads where necessary, and replenishing beaches. The costs described here are not the total costs of protection -- for example, no estimates are available for evaluating costs of protecting natural ecosystems. Other 3 costs left out are described in detail in the text
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