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Parameter Identification For Steady State Groundwater Flow Using A Prioriinformation Of Hydraulic Conductivity
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Book Synopsis PARAMETER IDENTIFICATION FOR STEADY STATE GROUNDWATER FLOW USING A PRIORIINFORMATION OF HYDRAULIC CONDUCTIVITY. by : Y. Utsugida
Download or read book PARAMETER IDENTIFICATION FOR STEADY STATE GROUNDWATER FLOW USING A PRIORIINFORMATION OF HYDRAULIC CONDUCTIVITY. written by Y. Utsugida and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Uniqueness of a Model of Steady-state Ground-water Flow by : Richard L. Cooley
Download or read book Uniqueness of a Model of Steady-state Ground-water Flow written by Richard L. Cooley and published by . This book was released on 1975 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Groundwater Model Parameter Estimation with Simultaneous and Sequential Use of Hydraulic Head and Travel Time Measurements by : Mohsen Kheirabadi
Download or read book Groundwater Model Parameter Estimation with Simultaneous and Sequential Use of Hydraulic Head and Travel Time Measurements written by Mohsen Kheirabadi and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study is an effort to investigate two parameter estimation approaches in groundwater modeling, sequential and combined. Most researches imply that simultaneous use of flow and transport observations would be more beneficial in parameter estimation, however some other researchers rise questions about this approach. They believe due to the differing geological properties of aquifers and consequently differing mathematical basis of groundwater flow compared to transport simultaneous use of different observations might not be useful in every cases. Despite the fact that parameter estimation or inverse modeling is not a new method in groundwater modeling, most modelers tend to use forward modeling to estimate parameters. In this research a synthetic heterogeneous K-field is created using SGeMS Sequential Gaussian Simulation. This K-field, derived zones of porosity and defined boundary conditions make our simulated confined aquifer. The model synthetic observations obtained from forward models MODFLOW and MODPATH, are used in the process of parameter estimation using PEST++. In order to have a better look at the model and find its weak points, different scenarios have been defined. Applying the principle of parsimony, difficulties have been added gradually in each scenario for the model. The sequential approach performs two calibrations: a flow calibration using head observations followed by the transport calibration using travel time observations. Both sets of observations are applied simultaneously in a single calibration run in the combined approach. Although, comparing estimated parameters with the initial synthetic reality values shows the better modeled results for both hydraulic conductivity and porosity while we apply combined approach. However time-cost along with difficulties to find a best weighs in combined approach imply that these differences are not significant.
Book Synopsis Inverse Problems in Groundwater Modeling by : Ne-Zheng Sun
Download or read book Inverse Problems in Groundwater Modeling written by Ne-Zheng Sun and published by Springer. This book was released on 1994-07-31 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: ... A diskette with the updated programme of Appendix C and examples is available through the author at a small fee. email: [email protected] fax: 1--310--825--5435 ... This book systematically discusses basic concepts, theory, solution methods and applications of inverse problems in groundwater modeling. It is the first book devoted to this subject. The inverse problem is defined and solved in both deterministic and statistic frameworks. Various direct and indirect methods are discussed and compared. As a useful tool, the adjoint state method and its applications are given in detail. For a stochastic field, the maximum likelihood estimation and co-kriging techniques are used to estimate unknown parameters. The ill-posed problem of inverse solution is highlighted through the whole book. The importance of data collection strategy is specially emphasized. Besides the classical design criteria, the relationships between decision making, prediction, parameter identification and experimental design are considered from the point of view of extended identifiabilities. The problem of model structure identification is also considered. This book can be used as a textbook for graduate students majoring in hydrogeology or related subjects. It is also a reference book for hydrogeologists, petroleum engineers, environmental engineers, mining engineers and applied mathematicians.
Book Synopsis Parameter Identification in Groundwater Flow by :
Download or read book Parameter Identification in Groundwater Flow written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A set of first-order differential state equations is developed from taking finite differences of the partial differential equation that describes groundwater flow during a pump-drawdown test. The number of states in the model is a direct function of the number of discrete spatial segments used in the approximate model. This number of states is studied to determine a reasonably low-order model that preserves the accuracy of resulting simulations when compared with an available analytical solution. The resulting reduced-order model is then used in an extended Kalman filter for combined state and parameter estimation. This report summarizes work done in a recent pilot study to demonstrate the feasibility of these techniques in groundwater research and points the way toward other approaches to this problem area now under study.
Book Synopsis Effective Groundwater Model Calibration by : Mary C. Hill
Download or read book Effective Groundwater Model Calibration written by Mary C. Hill and published by John Wiley & Sons. This book was released on 2006-08-25 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods and guidelines for developing and using mathematical models Turn to Effective Groundwater Model Calibration for a set of methods and guidelines that can help produce more accurate and transparent mathematical models. The models can represent groundwater flow and transport and other natural and engineered systems. Use this book and its extensive exercises to learn methods to fully exploit the data on hand, maximize the model's potential, and troubleshoot any problems that arise. Use the methods to perform: Sensitivity analysis to evaluate the information content of data Data assessment to identify (a) existing measurements that dominate model development and predictions and (b) potential measurements likely to improve the reliability of predictions Calibration to develop models that are consistent with the data in an optimal manner Uncertainty evaluation to quantify and communicate errors in simulated results that are often used to make important societal decisions Most of the methods are based on linear and nonlinear regression theory. Fourteen guidelines show the reader how to use the methods advantageously in practical situations. Exercises focus on a groundwater flow system and management problem, enabling readers to apply all the methods presented in the text. The exercises can be completed using the material provided in the book, or as hands-on computer exercises using instructions and files available on the text's accompanying Web site. Throughout the book, the authors stress the need for valid statistical concepts and easily understood presentation methods required to achieve well-tested, transparent models. Most of the examples and all of the exercises focus on simulating groundwater systems; other examples come from surface-water hydrology and geophysics. The methods and guidelines in the text are broadly applicable and can be used by students, researchers, and engineers to simulate many kinds systems.
Book Synopsis Modeling and Analysis of Hydraulic Interchange of Surface and Groundwater by : Alfred B. Cunningham
Download or read book Modeling and Analysis of Hydraulic Interchange of Surface and Groundwater written by Alfred B. Cunningham and published by . This book was released on 1977 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrogeological Regimes and Their Subsurface Thermal Effects by : Alan E. Beck
Download or read book Hydrogeological Regimes and Their Subsurface Thermal Effects written by Alan E. Beck and published by American Geophysical Union. This book was released on 1989 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 47. There are a number of reasons for organizing a symposium. One is to bring specialists together to discuss a specific problem in which they all have expertise and encourage the participants to talk openly about their current work which, in all likelihood, is not going to be in publishable form for some time. Another reason might be that a problem has been identified by one group of experts which needs the input from a previously loosely allied group before real progress can be made. The International Union of Geodesy and Geophysics Symposium U.S. "Hydrogeological Regimes and Their Subsurface Thermal Effects" organised for the August 1987 General Assembly in Vancouver, was a symposium of the latter type.
Book Synopsis Interpretation of Hydraulic Conductivity Data and Parameter Evaluation for Groundwater Flow Models by : Auli Niemi
Download or read book Interpretation of Hydraulic Conductivity Data and Parameter Evaluation for Groundwater Flow Models written by Auli Niemi and published by . This book was released on 1991 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tiivistelmä: Hydraulisten yksireikämittausten tulkinta pohjaveden virtausmallien parametrien estimoinniksi : kirjallisuuskatsaus.
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FTWORK written by and published by . This book was released on 1990 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seepage and Groundwater Flow by : K. R. Rushton
Download or read book Seepage and Groundwater Flow written by K. R. Rushton and published by John Wiley & Sons. This book was released on 1979 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Parameter Identification for the Linear Equation of Groundwater Flow by : Karim Shiati
Download or read book Parameter Identification for the Linear Equation of Groundwater Flow written by Karim Shiati and published by . This book was released on 1977 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Issue written by Giovanni Crosta and published by . This book was released on 1991 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydraulic Conductivity Identification for One Dimensional Flow in a Confined Aquifer by : Khaled M. Abu-Zeid
Download or read book Hydraulic Conductivity Identification for One Dimensional Flow in a Confined Aquifer written by Khaled M. Abu-Zeid and published by . This book was released on 1990 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Issue written by and published by . This book was released on 1991 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
