Download or read book Simulation of a Solvent Plume in a Sand and Gravel Aquifer in Cape Cod Massachusetts Using a 3 D Numerical Model written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simulation of a Solvent Plume in a Sand and Gravel Aquifer in Cape Code Massachusetts Using a 3 D Numerical Model written by Alberto M. Lázaro Castro and published by . This book was released on 1996 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Groundwater Modelling in Arid and Semi Arid Areas written by Howard S. Wheater and published by Cambridge University Press. This book was released on 2010-09-09 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Arid and semi-arid regions face major challenges in the management of scarce freshwater resources under pressures of population, economic development, climate change, pollution and over-abstraction. Groundwater is commonly the most important water resource in these areas. Groundwater models are widely used globally to understand groundwater systems and to guide decisions on management. However, the hydrology of arid and semi-arid areas is very different from that of humid regions, and there is little guidance on the special challenges of groundwater modelling for these areas. This book brings together the experience of internationally leading experts to fill a gap in the scientific and technical literature. It introduces state-of-the-art methods for modelling groundwater resources, illustrated with a wide-ranging set of illustrative examples from around the world. The book is valuable for researchers, practitioners in developed and developing countries, and graduate students in hydrology, hydrogeology, water resources management, environmental engineering and geography.
Download or read book Soils and Fertilizers written by and published by . This book was released on 1998 with total page 1054 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalogue Of the Engraved Works of Sir Joshua Reynolds written by and published by . This book was released on 1897 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1989 with total page 1296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Hydrology written by David R. Maidment and published by McGraw-Hill Companies. This book was released on 1993-02-22 with total page 1436 pages. Available in PDF, EPUB and Kindle. Book excerpt: An all-inclusive reference covering all practical aspects of hydrology. Twenty-nine chapters in four major sections: I. Hydrologic Cycle; II. Hydrologic Transport; III. Hydrologic Statistics; IV. Hydrologic Technology. 500 illustrations.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1989 with total page 1310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrogeology and Simulation of Groundwater Flow written by U. S. Department Of The Interior and published by . This book was released on 2009-12-01 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The region of southeastern Massachusetts where the Towns of Plymouth, Carver, Kingston and Duxbury are located is known for its abundant water resources, its cranberry agriculture, and its unique ecosystems. Rapid population growth in this region, however, has resulted in increased competition among agricultural, commercial, ecological, and residential demands for water resources. Continued population growth has created the potential for increased groundwater withdrawals that could deplete streamflow and lower surface-water levels in streams, ponds, and wetlands and increase the loading of nonpoint-source septic contamination. These potential effects may contribute to habitat destruction, degradation of water quality, and loss of wetlands. The unconfined aquifer that underlies this region is composed mostly of glacially deposited sediments ranging in size from clay to boulders and is the second largest aquifer system in Massachusetts (Hansen and Lapham, 1992). It ranges in thickness from less than 20 to more than 200 ft, and contains more than 500 billion gallons of freshwater (Williams and Tasker, 1974). Groundwater discharge from the aquifer supports numerous kettle ponds and coastal streams (fig. 1). The aquifer was designated as a Sole Source Aquifer by the U.S. Environmental Protection Agency, recognizing that groundwater is a vital source of drinking water for many of the communities in the area. The population in this region has nearly tripled in the past 30 years; as a result, nearly 40 percent of agricultural lands in the region have been lost to development (Woods Hole Research Center, 2007). Over the next 20 years, the overall population of southeastern Massachusetts is projected to increase by more than 200,000, making this part of southeastern Massachusetts the fastest growing region in the State (The Nature Conservancy, 2002). Large increases in population and the conversion of open space to residential development creates concerns for potential effects on the quality and quantity of the region's water supply. Historically, the Plymouth-Carver area has been one of the most important centers of cranberry production in the United States. Cranberries produced in this region account for most of the Massachusetts harvests, and in 2001 were about one-third of the Nation's harvest (New England Agricultural Statistics Service, 2002). In recent years, a variety of economic factors, including out-of-state competition and declining cranberry prices, has led some cranberry growers to convert upland portions of their land holdings to residential development (Flint, 2002).The Nature Conservancy has recognized this area as one of the most significant ecosystems in the northeastern United States. The region contains unique ecosystems such as the Plymouth Pinelands, an approximately 30-mi2 area in the northeastern portion of the region, a large state forest (Myles Standish State Forest), and two State-designated Areas of Critical Environmental Concern (Ellisville Harbor and the Herring River Watershed) (fig. 1). Current and predicted growth in population and residential development and the reliance in this area on groundwater for water supply created the need for a reexamination of the water resources of the Plymouth-Carver-Kingston-Duxbury (PCKD) aquifer system. The U.S. Geological Survey (USGS), in cooperation with the Massachusetts Department of Environmental Protection, has conducted previous hydrologic studies of the aquifer system, including hydrologic assessments of aquifer yield and water quality (Williams and Tasker, 1974; Persky, 1993) and a regional modeling study (Hansen and Lapham, 1992). Advances in computing capabilities, numerical groundwater-flow models, and geographic information system (GIS) tools developed since the previous studies were conducted have allowed for the development of a more sophisticated groundwater-flow model that builds upon those earlier efforts.
Download or read book A Three dimensional Method of characteristics Solute Transport Model MOC3D written by Leonard F. Konikow and published by . This book was released on 1996 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contaminants in the Subsurface written by National Research Council and published by National Academies Press. This book was released on 2005-04-23 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: At hundreds of thousands of commercial, industrial, and military sites across the country, subsurface materials including groundwater are contaminated with chemical waste. The last decade has seen growing interest in using aggressive source remediation technologies to remove contaminants from the subsurface, but there is limited understanding of (1) the effectiveness of these technologies and (2) the overall effect of mass removal on groundwater quality. This report reviews the suite of technologies available for source remediation and their ability to reach a variety of cleanup goals, from meeting regulatory standards for groundwater to reducing costs. The report proposes elements of a protocol for accomplishing source remediation that should enable project managers to decide whether and how to pursue source remediation at their sites.
Download or read book Alternatives for Managing the Nation s Complex Contaminated Groundwater Sites written by National Research Council and published by National Academies Press. This book was released on 2013-02-27 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Permeable Barriers for Groundwater Remediation written by Arun R. Gavaskar and published by . This book was released on 1998 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the limitations of conventional pump-and-treat systems in treating groundwater contaminants, permeable barriers are potentially more cost-effective than pump-and-treat systems for treating dissolved chlorinated solvent plumes, which may persist in the saturated zone for several decades. Other contaminants, such as chromium or other soluble heavy metals, can also be treated with this technology. Permeable Barriers for Groundwater Remediation discusses the types of permeable barriers, their design and construction, and how they can be monitored to evaluate compliance. It provides practical guidance on reactive media selection, treatability testing, hydrogeologic and geochemical modeling, and innovative installation techniques for the evaluation and application of this promising new technology. The types of permeable barriers discussed include: trench-type and caisson-based reactive cells; innovative emplacements, such as horizontal trenching and jetting; and continuous reactive barriers versus funnel-and-gate systems.
Download or read book Ground Water in Freshwater saltwater Environments of the Atlantic Coast written by Paul M. Barlow and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ethnic Genesis written by Doug Kupel and published by . This book was released on 1979 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seawater Intrusion in Coastal Aquifers written by Jacob Bear and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal aquifers serve as major sources for freshwater supply in many countries around the world, especially in arid and semi-arid zones. Many coastal areas are also heavily urbanized, a fact that makes the need for freshwater even more acute. Coastal aquifers are highly sensitive to disturbances. Inappropriate management of a coastal aquifer may lead to its destruction as a source for freshwater much earlier than other aquifers which are not connected to the sea. The reason is the threat of seawater intrusion. In many coastal aquifers, intrusion of seawater has become one of the major constraints imposed on groundwater utilization. As sea water intrusion progresses, existing pumping wells, especially those close to the coast, become saline and have to be abandoned. Also, the area above the intruding seawater wedge is lost as a source of natural replenishment to the aquifer. Despite the importance of this subject, so far there does not exist a book that integrates our present knowledge of seawater intrusion, its occurrences, physical mechanism, chemistry, exploration by geo physical and geochemical techniques, conceptual and mathematical modeling, analytical and numerical solution methods, engineering measures of combating seawater intrusion, management strategies, and experience learned from case studies. By presenting this fairly comprehensive volume on the state-of-the-art of knowledge and ex perience on saltwater intrusion, we hoped to transfer this body of knowledge to the geologists, hydrologists, hydraulic engineers, water resources planners, managers, and governmental policy makers, who are engaged in the sustainable development of coastal fresh ground water resources.
Download or read book Plume 3D written by Jan Wagner and published by . This book was released on 1985 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: A closed-form analytical solution for three-dimensional plumes was incorporated in an interactive computer program. The assumption of an infinite aquifer depth and uniform source mass rate and source location was overcome by using the principal of superposition in space and time. The source code was written in a subset of FORTRAN 77 and can be compiled with FORTRAN IV, FORTRAN 66 as well as FORTRAN 77. As a result, the code is nearly independent of hardware and operating system.
