Hydrogeologic Models Of Sedimentary Aquifers
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Hydrogeologic Models Of Sedimentary Aquifers
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Author : Gordon S. Fraser
language : en
Publisher: SEPM (Society for Sedimentary Geology)
Release Date : 1998
Hydrogeologic Models Of Sedimentary Aquifers written by Gordon S. Fraser and has been published by SEPM (Society for Sedimentary Geology) this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Science categories.
Aquifer Characterization Techniques
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Author : Robert G. Maliva
language : en
Publisher: Springer
Release Date : 2016-05-26
Aquifer Characterization Techniques written by Robert G. Maliva and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-05-26 with Science categories.
This book presents an overview of techniques that are available to characterize sedimentary aquifers. Groundwater flow and solute transport are strongly affected by aquifer heterogeneity. Improved aquifer characterization can allow for a better conceptual understanding of aquifer systems, which can lead to more accurate groundwater models and successful water management solutions, such as contaminant remediation and managed aquifer recharge systems. This book has an applied perspective in that it considers the practicality of techniques for actual groundwater management and development projects in terms of costs, technical resources and expertise required, and investigation time. A discussion of the geological causes, types, and scales of aquifer heterogeneity is first provided. Aquifer characterization methods are then discussed, followed by chapters on data upscaling, groundwater modelling, and geostatistics. This book is a must for every practitioner, graduate student, or researcher dealing with aquifer characterization .
Hydrological Models Of Sedimentary Aquifers
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Author :
language : en
Publisher:
Release Date : 1998
Hydrological Models Of Sedimentary Aquifers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Theory Modeling And Field Investigation In Hydrogeology
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Author : S. P. Neuman
language : en
Publisher: Geological Society of America
Release Date : 2000-01-01
Theory Modeling And Field Investigation In Hydrogeology written by S. P. Neuman and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-01-01 with Science categories.
The refereed and edited proceedings of the symposium Schlomo P. Neuman: Recent Advances After 30 Years of Exceptional Contributions to Well Hydraulics, Numerical Modeling, and Field Investigations, which was held in Tucson, Arizona, in October 1998. Among the topics are four decades of inverse problems in hydrogeology, a connected-network paradigm for the alluvial aquifer system, the influence of multi-scale structure in non-ergodic solute transport in heterogeneous porous media, the Gaussian analysis of one-dimensional unsaturated flow in randomly heterogeneous soils, and the type-curve interpretation of transient single-hole pneumatic injection tests in unsaturated fractured tuffs at the Apache Leap Research Site. Annotation copyrighted by Book News Inc., Portland, OR
Hydrogeologic Framework And Hydrologic Budget Components Of The Columbia Plateau Regional Aquifer System Washington Oregon And Idaho
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Author :
language : en
Publisher:
Release Date : 2011
Hydrogeologic Framework And Hydrologic Budget Components Of The Columbia Plateau Regional Aquifer System Washington Oregon And Idaho written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Aquifers categories.
The Columbia Plateau Regional Aquifer System (CPRAS) covers an area of about 44,000 square miles in a structural and topographic basin within the drainage of the Columbia River in Washington, Oregon, and Idaho. The primary aquifers are basalts of the Columbia River Basalt Group (CRBG) and overlying sediment. Eighty percent of the groundwater use in the study area is for irrigation, in support of a $6 billion per year agricultural economy. Water-resources issues in the Columbia Plateau include competing agricultural, domestic, and environmental demands. Groundwater levels were measured in 470 wells in 1984 and 2009; water levels declined in 83 percent of the wells, and declines greater than 25 feet were measured in 29 percent of the wells. Conceptually, the system is a series of productive basalt aquifers consisting of permeable interflow zones separated by less permeable flow interiors; in places, sedimentary aquifers overly the basalts. The aquifer system of the CPRAS includes seven hydrogeologic units--the overburden aquifer, three aquifer units in the permeable basalt rock, two confining units, and a basement confining unit. The overburden aquifer includes alluvial and colluvial valley-fill deposits; the three basalt units are the Saddle Mountains, Wanapum, and Grande Ronde Basalts and their intercalated sediments. The confining units are equivalent to the Saddle Mountains-Wanapum and Wanapum-Grande Ronde interbeds, referred to in this study as the Mabton and Vantage Interbeds, respectively. The basement confining unit, referred to as Older Bedrock, consists of pre-CRBG rocks that generally have much lower permeabilities than the basalts and are considered the base of the regional flow system. Based on specific-capacity data, median horizontal hydraulic conductivity (Kh) values for the overburden, basalt units, and bedrock are 161, 70, and 6 feet per day, respectively. Analysis of oxygen isotopes in water and carbon isotopes in dissolved inorganic carbon from groundwater samples indicates that groundwater in the CPRAS ranges in age from modern (50 years) to Pleistocene (10,000 years). The oldest groundwater resides in deep, downgradient locations indicating that groundwater movement and replenishment in parts of this regional aquifer system have operated on long timescales under past natural conditions, which is consistent with the length and depth of long flow paths in the system. The mean annual recharge from infiltration of precipitation for the 23-year period 1985-2007 was estimated to be 4.6 inches per year (14,980 cubic feet per second) using a polynomial regression equation based on annual precipitation and the results of recharge modeling done in the 1980s. A regional-scale hydrologic budget was developed using a monthly SOil WATer (SOWAT) Balance model to estimate irrigation-water demand, groundwater flux (recharge or discharge), direct runoff, and soil moisture within irrigated areas. Mean monthly irrigation throughout the study area peaks in July at 1.6 million acre-feet (MAF), of which 0.45 and 1.15 MAF are from groundwater and surface-water sources, respectively. Annual irrigation water use in the study area averaged 5.3 MAF during the period 1985-2007, with 1.4 MAF (or 26 percent) supplied from groundwater and 3.9 MAF supplied from surface water. Mean annual recharge from irrigation return flow in the study area was 4.2 MAF (1985-2007) with 2.1 MAF (50 percent) occurring within the predominately surface-water irrigated regions of the study area. Annual groundwater-use estimates were made for public supply, self-supplied domestic, industrial, and other uses for the period 1984 through 2009. Public supply groundwater use within the study area increased from 200,600 acre-feet per year (acre-ft/yr) in 1984 to 269,100 acre-ft/yr in 2009. Domestic self-supplied groundwater use increased from 54,580 acre-ft/yr in 1984 to 71,160 acre-ft/yr in 2009. Industrial groundwater use decreased from 53,390 acre-ft/yr in 1984 to 43,930 acre-ft/yr in 2009.
Modflow Ground Water Model
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Author : S. A. Leake
language : en
Publisher:
Release Date : 2007
Modflow Ground Water Model written by S. A. Leake and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Aquifers categories.
A new computer program was developed to simulate vertical compaction in models of regional ground-water flow. The program simulates ground-water storage changes and compaction in discontinuous interbeds or in extensive confining units, accounting for stress-dependent changes in storage properties. The new program is a package for MODFLOW, the U.S. Geological Survey modular finite-difference ground-water flow model. Several features of the program make it useful for application in shallow, unconfined flow systems. Geostatic stress can be treated as a function of water-table elevation, and compaction is a function of computed changes in effective stress at the bottom of a model layer. Thickness of compressible sediments in an unconfined model layer can vary in proportion to saturated thickness.
Guidelines For Evaluating Ground Water Flow Models
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Author : Thomas E. Reilly
language : en
Publisher: DIANE Publishing
Release Date : 2004
Guidelines For Evaluating Ground Water Flow Models written by Thomas E. Reilly and has been published by DIANE Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Groundwater flow categories.
Analysis Of Aquifer Tests To Determine Hydrologic And Water Quality Conditions In Stratified Drift And Riverbed Sediments Near A Former Municipal Well Milford New Hampshire
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Author : Thomas J. Mack
language : en
Publisher:
Release Date : 1996
Analysis Of Aquifer Tests To Determine Hydrologic And Water Quality Conditions In Stratified Drift And Riverbed Sediments Near A Former Municipal Well Milford New Hampshire written by Thomas J. Mack and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Groundwater categories.
Heterogeneity In Sedimentary Aquifers
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Author : Timothy T. Eaton
language : en
Publisher:
Release Date : 2006
Heterogeneity In Sedimentary Aquifers written by Timothy T. Eaton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Grundwasserstrom categories.
Unsaturated Flow In Hydrologic Modeling
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Author : H.J. Morel-Seytoux
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Unsaturated Flow In Hydrologic Modeling written by H.J. Morel-Seytoux and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
This volume certainly is a Conference Proceedings, the Proceedings of the NATO Advanced Research Workshop (ARW) on "Unsaturated Flow in Hydrologic Modeling" held at "Les Villages du Soleil" near ArIes, France from June 13 to 17, 1988. Let me therefore acknowledge properly, at the very beginning, the gratitude of all the participants to the NATO Science Committee for its generous support and worthwhile goal of bringing together scientists of many countries to communicate and share their experiences. Particular thanks are extended to the director of the program, Dr. Luis Vega da Cunha for his interest and understanding. On the other hand this volume is also, and probably more so, a Textbook that fills a gap in the field of unsaturated flow. Many treatises on the subject present the theory in its different aspects. Hardly any explain in details how the different pieces can be put together to address realistic problems at the basin scale. The various invited contributions to the ARW were structured in a subject progression much as chapters are organized in a book. The intent of the ARW was to assess the current state of knowledge in "Unsaturated Flow" and its use in "Hydrologic Modeling Practice". In a sense the interest in fundamentals of unsaturated flow in this ARW was not just for the sake of knowledge but also and primarily for the sake of action. Can such fundamental knowledge be utilized for better management of the water resource? was the basic question.