Author:
Publisher:
ISBN:
Category : Building
Languages : en
Pages : 44

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Author: New York (State)
Publisher:
ISBN: 9781609839178
Category : Building laws
Languages : en
Pages :

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Author: G. Dennis Cooke
Publisher: Elsevier
ISBN: 1483163253
Category : Technology & Engineering
Languages : en
Pages : 401

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Lake and Reservoir Restoration deals with the eutrophication process and the methods to protect, restore, and manage lakes and reservoirs. The most common in-lake techniques or procedures, plus nutrient diversion, are reviewed with regard to their scientific basis, methods of application, known effectiveness, feasibility, drawbacks, and costs. Areas for further research and development are also highlighted. This book is comprised of 16 chapters organized into four sections. After an introduction to the theory of the problem and the restoration technique, the discussion turns to the various restoration methods such as those used for physical and chemical control of nutrients. Diversion and advanced waste treatment, hypolimnetic withdrawal, and dilution and flushing are considered along with phosphorus precipitation and inactivation, sediment oxidation, sediment removal, and hypolimnetic aeration. Case studies and success stories are presented and the costs and potential negative impacts of the methods are examined. The following chapters focus on methods to control plant biomass, including artificial circulation, water-level drawdown, harvesting, biological control, and surface and sediment covers. A chapter on liming acidified lakes concludes this text. This monograph will be useful to professional limnologists and engineers, on-site lake or reservoir managers, and those who are interested in learning about the problems and management of lakes and reservoirs.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 48

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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309278139
Category : Nature
Languages : en
Pages : 423

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Across the United States, thousands of hazardous waste sites are contaminated with chemicals that prevent the underlying groundwater from meeting drinking water standards. These include Superfund sites and other facilities that handle and dispose of hazardous waste, active and inactive dry cleaners, and leaking underground storage tanks; many are at federal facilities such as military installations. While many sites have been closed over the past 30 years through cleanup programs run by the U.S. Department of Defense, the U.S. EPA, and other state and federal agencies, the remaining caseload is much more difficult to address because the nature of the contamination and subsurface conditions make it difficult to achieve drinking water standards in the affected groundwater. Alternatives for Managing the Nation's Complex Contaminated Groundwater Sites estimates that at least 126,000 sites across the U.S. still have contaminated groundwater, and their closure is expected to cost at least $110 billion to $127 billion. About 10 percent of these sites are considered "complex," meaning restoration is unlikely to be achieved in the next 50 to 100 years due to technological limitations. At sites where contaminant concentrations have plateaued at levels above cleanup goals despite active efforts, the report recommends evaluating whether the sites should transition to long-term management, where risks would be monitored and harmful exposures prevented, but at reduced costs.

Author:
Publisher:
ISBN:
Category : Consumer protection
Languages : en
Pages : 100

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Author: Mary D. Davis
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 158

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Author: Floyd I. Brewer
Publisher:
ISBN: 9780963540201
Category : Bethlehem (N.Y.)
Languages : en
Pages : 501

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Author: James Schwab
Publisher: Routledge
ISBN: 9781932364576
Category : City planning
Languages : en
Pages : 0

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The solution is far more complex than planting more trees, however. Urban forestry professionals and advocates must maximize green infrastructure (the natural environment) while reducing the costs of gray infrastructure (the built environment). While both are important, communities that foster green infrastructure are more livable, produce fewer pollutants, and are most cost-effective to operate.

Author:
Publisher:
ISBN:
Category : Flood control
Languages : en
Pages : 166

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