Download or read book Case Study for Delineating a Contributing Area to a Well in a Fractured Siliciclastic bedrock Aquifer Near Lansdale Pennsylvania written by and published by . This book was released on 2003 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Case Study for Delineating a Contributing Area to a Well in a Fractured Siliciclastic bedrock Aquifer Near Lansdale Pennsylvania written by and published by . This book was released on 2003 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2003 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Case Study for Delineating a Contributing Area to a Water supply Well in a Fractured Crystalline bedrock Aquifer Stewartstown Pennsylvania written by and published by . This book was released on 1999 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water resources Investigations Report written by and published by . This book was released on 2002 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Delineation of Water Sources for Public supply Wells in Three Fractured bedrock Aquifer Systems in Massachusetts written by Forest P. Lyford and published by . This book was released on 2003 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: ... Studied fractured-bedrock aquifer systems in West Newbury (in the Eliot Formation), Maynard (in the Nashoba Formation), and Paxton (in the Paxton and Littleton Formations) to advance methods of data collection and analysis for delineating contributing areas to public-supply wells completed in fractured rock and for determining the effects of pumping on streams and wetlands ...

Download or read book Delineation of Wellhead Protection Areas in Fractured Rocks written by and published by . This book was released on 1991 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Delineation and Analysis of Uncertainty of Contributing Areas to Wells at the Southbury Training School Southbury Connecticut written by J. Jeffrey Starn and published by . This book was released on 2000 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vulnerability of Urban Public Supply Wells in Fractured Siliciclastic Aquifer Systems written by and published by . This book was released on 2012 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approximately one third of the U.S. population uses public supply wells (PSWs) as their drinking water source and recently a greater focus has been placed on assessing the risk of contaminants entering PSWs. Among the many contaminants of concern are chemical and microbiological indicators of wastewater contamination. This research project used a variety of field methods to better understand the primary mechanisms that control the transport of human enteric viruses and other wastewater contaminants in bedrock multi-aquifer systems and to develop effective methods for assessing the vulnerability of PSWs in such settings. At a field site in Madison, WI, borehole investigations suggest that fractures in siliclastic bedrock are important transport pathways from the surface to the deep aquifer. Some fractured intervals have transmissivity values several orders of magnitude higher than non-fractured intervals. In a siliciclastic aquifer near a public supply well, fractures may have an important role in the transport of sewer-derived wastewater contaminants. Reverse water-level fluctuations (RWFs), a phenomenon in which water levels rise briefly in response to pumping, were detected in monitoring wells. Data from pressure transducers located at varying depths and distances from a PSW suggest that the RWFs propagate rapidly through fractures to influence wells hundreds of meters from the pumping well. The rate and cycling frequency of pumping is an important factor in the magnitude of RWFs. The pattern of RWF propagation can be used to better define fracture connectivity in an aquifer system. Time sequenced sampling for geochemical wastewater indicators and human enteric viruses is a useful tool for characterizing transport within an aquifer system. There is an apparent connection between recharge events and increased flow in sanitary sewers and, based on limited data, these increased wastewater flows appear linked with virus detection in groundwater at short times after these events. In order to accurately assess the vulnerability of PSWs to near surface contaminants it is important to characterize fracture flow and the impact of PSW pumping. The use of RWFs to determine fracture connectivity is an important method to accomplish this goal.

Download or read book Evaluation of Methods for Delineating Areas that Contribute Water to Wells Completed in Valley fill Aquifers in Pennsylvania written by Dennis W. Risser and published by . This book was released on 1994 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific Investigations Report written by Sharon E. Kroening and published by . This book was released on 2004 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alluvial Fans written by Adrian M. Harvey and published by Geological Society of London. This book was released on 2005 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alluvial fans are important sedimentary environments. They trap sediment delivered from mountain source areas, and exert an important control on the delivery of sediment to downstream environments, to axial drainages and to sedimentary basins. They preserve a sensitive record of environmental change within the mountain source areas. Alluvial fan geomorphology and sedimentology reflect not only drainage basin size and geology, but change in response to tectonic, climatic and base-level controls. One of the challenges facing alluvial fan research is to resolve how these gross controls are reflected in alluvial fan dynamics and to apply the results of studies of modern fan processes and Quaternary fans to the understanding of sedimentary sequences in the rock record. This volume includes papers based on up-to-date research, and focuses on three themes: alluvial fan processes, dynamics of Quaternary alluvial fans and fan sedimentary sequences. Linking the papers is an emphasis on the controls of fan geomorphology, sedimentology and dynamics. This provides a basis for integration between geomorphological and sedimentological approaches, and an understanding how fluvial systems respond to tectonic, climatic and base-level changes.

Download or read book Geomorphology of Desert Environments written by A. D. Abrahams and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 1021 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last twenty years there has been a major expansion of knowledge in the field of landforms and landforming processes of deserts. This advanced-level book provides a benchmark for the current state of science, and is written by an international team of authors who are acknowledged experts in their fields.

Download or read book Fraktur Writings and Folk Art Drawings of the Schwenkfelder Library Collection written by Dennis K. Moyer and published by Schwenkfelder Library. This book was released on 1998 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Regional Ground Water Quality written by William M. Alley and published by John Wiley & Sons. This book was released on 1993-06-15 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ground water serves as the main source of drinking water for 50% of the United States as a whole—and for 97% of rural populations, in particular. In addition to public concern with point sources of contamination, such as landfills and hazardous waste disposal sites, current attention has now come to focus on the overall quality of ground-water resources. Regional Ground-Water Quality offers the first detailed guidance for conducting ground-water quality investigations in a regional context. This exceptional volume combines hydrogeologic and geochemical principles, as well as statistical principles, within a unique conceptual framework that helps readers produce efficient, meaningful, and successful ground-water assessments. Regional Ground-Water Quality will be a valuable resource when first approaching a regional-scale study and when designing specific regional-scale studies. Throughout the book, topics emphasize the value of studying regional ground-water quality at multiple spatial and temporal scales. Up-to-date coverage of essential processes and methodologies includes: multi-scale design concepts for regional ground-water quality studies the fate and transport of organic and inorganic materials, including nitrates, pesticides, pathogens, acid precipitation, natural radionuclides, saltwater intrusion, and problems in karst aquifers basic concepts of organic and inorganic chemistry a review of environmental isotopes and geochemical modeling statistical concepts for ground-water quality surveys and geostatistical analysis the effects of surface-water/ground-water interactions on ground-water quality the relationship between ground-water quality and land use regional geochemistry principles Readers will be brought completely up to date with the latest research in ground-water assessments, such as novel methods for dating young ground water, including the use of CFCs, tritium/helium-3, and krypton-85. The book also examines the uses of organic compounds as time and source markers, ground-water vulnerability analyses, applications of subsurface microbiology at the regional scale, and design of well-water surveys. Invaluable case studies drawn from international projects graphically demonstrate concepts discussed in the book. These case studies describe successful regional ground-water assessment efforts conducted in various areas and include a look at the uses and limitations of existing ground-water quality data. A first-of-its-kind resource, Regional Ground-Water Quality will be essential reading for scientists and engineers in hydrology, water resources, agricultural sciences, and environmental sciences. It will also be of interest to engineers and R&D personnel in government, industry, and private consulting, as well as to professionals involved with the design and interpretation of studies.

Download or read book New Publications of the U S Geological Survey written by and published by . This book was released on 2003 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Research of the U S Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1975 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific notes and summaries of investigations in geology, hydrology, and related fields.