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Freshwater is a most precious natural resource. To the developed world, refreshing, untainted water is presumed from the taps of millions of householders. The many rivers, streams, ponds and lakes are for the pleasure and enjoyment of the leisure hours of urban dweller and rural inhabitant alike-boating, fishing, sailing and swimming come readily to mind. To the agriculturalist and industrialist it is often the cornerstone of their enterprises. To the environmentalist and naturalist it is the basis of the wetland and open water communities which provide the habitats for a wealth of flora and fauna. In the developing world the emphasis is very different. A spring, well, river or swamp is the basis of day-to-day survival for family, livestock and crops. Subsistence fishing is often the major source of protein. Freshwater may be the unwitting purveyor of disease but with good management this can be regulated and monitored. But Man by nature, is a selfish species who tends to have scant regard for the quality of life of future generations. The much publicised destruction of forests is a notorious example. Not so well-known is the pressure on one of the world's most fragile ecosystems, the wetlands.
Approximately 3 million gallons of oil or refined petroleum products are spilled into U.S. waters every year. Oil dispersants (chemical agents such as surfactants, solvents, and other compounds) are used to reduce the effect of oil spills by changing the chemical and physical properties of the oil. By enhancing the amount of oil that physically mixes into the water, dispersants can reduce the potential that a surface slick will contaminate shoreline habitats. Although called for in the Oil Pollution Act of 1990 as a tool for minimizing the impact of oil spills, the use of chemical dispersants has long been controversial. This book reviews the adequacy of existing information and ongoing research regarding the effectiveness of dispersants as an oil spill response technique, as well as the effect of dispersed oil on marine and coastal ecosystems. Oil Spill Dispersants also includes recommended steps for policy makers faced with making hard choices regarding the use of dispersants as part of spill contingency planning efforts or during actual spills.
Since the early 1970s, experts have recognized that petroleum pollutants were being discharged in marine waters worldwide, from oil spills, vessel operations, and land-based sources. Public attention to oil spills has forced improvements. Still, a considerable amount of oil is discharged yearly into sensitive coastal environments. Oil in the Sea provides the best available estimate of oil pollutant discharge into marine waters, including an evaluation of the methods for assessing petroleum load and a discussion about the concerns these loads represent. Featuring close-up looks at the Exxon Valdez spill and other notable events, the book identifies important research questions and makes recommendations for better analysis ofâ€"and more effective measures againstâ€"pollutant discharge. The book discusses: Inputâ€"where the discharges come from, including the role of two-stroke engines used on recreational craft. Behavior or fateâ€"how oil is affected by processes such as evaporation as it moves through the marine environment. Effectsâ€"what we know about the effects of petroleum hydrocarbons on marine organisms and ecosystems. Providing a needed update on a problem of international importance, this book will be of interest to energy policy makers, industry officials and managers, engineers and researchers, and advocates for the marine environment.
Diluted bitumen has been transported by pipeline in the United States for more than 40 years, with the amount increasing recently as a result of improved extraction technologies and resulting increases in production and exportation of Canadian diluted bitumen. The increased importation of Canadian diluted bitumen to the United States has strained the existing pipeline capacity and contributed to the expansion of pipeline mileage over the past 5 years. Although rising North American crude oil production has resulted in greater transport of crude oil by rail or tanker, oil pipelines continue to deliver the vast majority of crude oil supplies to U.S. refineries. Spills of Diluted Bitumen from Pipelines examines the current state of knowledge and identifies the relevant properties and characteristics of the transport, fate, and effects of diluted bitumen and commonly transported crude oils when spilled in the environment. This report assesses whether the differences between properties of diluted bitumen and those of other commonly transported crude oils warrant modifications to the regulations governing spill response plans and cleanup. Given the nature of pipeline operations, response planning, and the oil industry, the recommendations outlined in this study are broadly applicable to other modes of transportation as well.
Whether the result of an oil well blowout, vessel collision or grounding, leaking pipeline, or other incident at sea, each marine oil spill will present unique circumstances and challenges. The oil type and properties, location, time of year, duration of spill, water depth, environmental conditions, affected biomes, potential human community impact, and available resources may vary significantly. Also, each spill may be governed by policy guidelines, such as those set forth in the National Response Plan, Regional Response Plans, or Area Contingency Plans. To respond effectively to the specific conditions presented during an oil spill, spill responders have used a variety of response optionsâ€"including mechanical recovery of oil using skimmers and booms, in situ burning of oil, monitored natural attenuation of oil, and dispersion of oil by chemical dispersants. Because each response method has advantages and disadvantages, it is important to understand specific scenarios where a net benefit may be achieved by using a particular tool or combination of tools. This report builds on two previous National Research Council reports on dispersant use to provide a current understanding of the state of science and to inform future marine oil spill response operations. The response to the 2010 Deepwater Horizon spill included an unprecedented use of dispersants via both surface application and subsea injection. The magnitude of the spill stimulated interest and funding for research on oil spill response, and dispersant use in particular. This study assesses the effects and efficacy of dispersants as an oil spill response tool and evaluates trade-offs associated with dispersant use.
The demand for oil and gas has brought exploration and production to unprecedented depths of the world’s oceans. Currently, over 50% of the oil from the Gulf of Mexico now comes from waters in excess of 1,500 meters (one mile) deep, where no oil was produced just 20 years ago. The Deepwater Horizon oil spill blowout did much to change the perception of oil spills as coming just from tanker accidents, train derailments, and pipeline ruptures. In fact, beginning with the Ixtoc 1 spill off Campeche, Mexico in 1979-1980, there have been a series of large spill events originating at the sea bottom and creating a myriad of new environmental and well control challenges. This volume explores the physics, chemistry, sub-surface oil deposition and environmental impacts of deep oil spills. Key lessons learned from the responses to previous deep spills, as well as unresolved scientific questions for additional research are highlighted, all of which are appropriate for governmental regulators, politicians, industry decision-makers, first responders, researchers and students wanting an incisive overview of issues surrounding deep-water oil and gas production.
AS ALEX PRUD’HOMME and his great-aunt Julia Child were completing their collaboration on her memoir, My Life in France, they began to talk about the French obsession with bottled water, which had finally spread to America. From this spark of interest, Prud’homme began what would become an ambitious quest to understand the evolving story of freshwater. What he found was shocking: as the climate warms and world population grows, demand for water has surged, but supplies of freshwater are static or dropping, and new threats to water quality appear every day. The Ripple Effect is Prud’homme’s vivid and engaging inquiry into the fate of freshwater in the twenty-first century. The questions he sought to answer were urgent: Will there be enough water to satisfy demand? What are the threats to its quality? What is the state of our water infrastructure—both the pipes that bring us freshwater and the levees that keep it out? How secure is our water supply from natural disasters and terrorist attacks? Can we create new sources for our water supply through scientific innovation? Is water a right like air or a commodity like oil—and who should control the tap? Will the wars of the twenty-first century be fought over water? Like Daniel Yergin’s classic The Prize: The Epic Quest for Oil, Money & Power, Prud’homme’s The Ripple Effect is a masterwork of investigation and dramatic narrative. With striking instincts for a revelatory story, Prud’homme introduces readers to an array of colorful, obsessive, brilliant—and sometimes shadowy—characters through whom these issues come alive. Prud’homme traversed the country, and he takes readers into the heart of the daily dramas that will determine the future of this essential resource—from the alleged murder of a water scientist in a New Jersey purification plant, to the epic confrontation between salmon fishermen and copper miners in Alaska, to the poisoning of Wisconsin wells, to the epidemic of intersex fish in the Chesapeake Bay, to the wars over fracking for natural gas. Michael Pollan has changed the way we think about the food we eat; Alex Prud’homme will change the way we think about the water we drink. Informative and provocative, The Ripple Effect is a major achievement.
At an increasingly global scale, aquatic scientists are heavily entrenched in understanding the fate of marine ecosystems in the face of human-altered environments. Oil spill disasters, especially large-scale ones like the 2010 Deepwater Horizon tragedy, have left uncertain and indelible marks on marine ecosystems. Impacts of Oil Spill Disasters on Marine Habitats and Fisheries in North America contains independent scientific findings and critical reviews from experts researching the impacts of the Exxon Valdez, Ixtoc I, and Deepwater Horizon oil spills on coastal fishery resources. Comprised of three sections, this seminal work: Details the physiological effects of oil-derived compounds on fishes, presenting results from field and laboratory investigations Addresses the science of assessing the impacts of oil spills and oil response measures on coastal habitats, with an emphasis on salt-marsh ecosystems in the Gulf of Mexico Explores the quantified and potential impacts of oil spills on population and community dynamics of commercial and recreational fishery species Provides newly released results from the 25-year recovery of marine mammals, birds, and fishes following the Exxon Valdez spill Chapters discuss new techniques for collecting and processing blood samples for toxicity testing, new aerial radar techniques for detecting unseen oil on marshes, consequences of oil prevention measures (such as diverting fresh water to estuaries or building sand berms to stop oil) on coastal fishery resources, and non-traditional methods for assessing the herring stock in Prince William Sound, Alaska, USA following the Exxon Valdez disaster.
Scientists directly involved in studying the Exxon Valdez spill provide a comprehensive synthesis of scientific information on long-term spill effects.