Download or read book Method and Computer Programs to Improve Pathline Resolution Near Weak Sinks Representing Wells in MODFLOW and MODPATH Ground water flow Simulations written by Frederick J. Spitz and published by . This book was released on 2001 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book METHOD AND COMPUTER PROGRAMS TO IMPROVE PATHLINE RESOLUTIONS NEAR WEAK SINKS REPRESENTING WELLS IN MODFLOW AND MODPATH GROUND WATER FLOW SIM written by and published by . This book was released on 2002* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Simulated Effects of Alternative Pumping Strategies on Ground water flow Patterns and Areas Contributing Recharge to Selected Wells Near Kenvil Morris County New Jersey written by Frederick J. Spitz and published by . This book was released on 2001 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 2001 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book User Guide for Modpath Version 6 a Particle tracking Model for Modflow written by David W. Pollock and published by CreateSpace. This book was released on 2014-06-16 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes MODPATH, a particle-tracking model designed to work with output from the U.S. Geological Survey groundwater flow model commonly referred to as MODFLOW. The model program can be obtained at http: //water.usgs.gov/software/ground_water.html/. The performance of the program has been tested for a variety of test problems; however, future applications might reveal errors that were not detected in the test simulations

Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 2001 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Publications of the U S Geological Survey written by and published by . This book was released on 2000 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Data Input Program MFI for the U S Geological Survey Modular Finite difference Ground water Flow Model written by Arlen W. Harbaugh and published by . This book was released on 1994 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Summary of Selected Computer Programs Produced by the U S Geological Survey for Simulation of Ground water Flow and Quality 1994 written by Charles A. Appel and published by . This book was released on 1994 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Computer Program for Simulation of Three Dimensional Variable Density Ground Water Flow U S Geological Survey Techniques of Water Resources Investigations Book 6 Chapter A 7 2002 written by and published by . This book was released on 2002 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Documentation of a Computer Program Streamlink to Represent Direct flow Connections in a Coupled Ground water and Surface water Model written by Eric D. Swain and published by . This book was released on 1993 with total page 68 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 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.

Download or read book A Statistical Processor for Analyzing Simulations Made Using the Modular Finite Difference Ground water Flow Model written by J. C. Scott and published by . This book was released on 1990 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Also available electronically in PDF.

Download or read book Documentation for HYDMOD written by R. T. Hanson and published by . This book was released on 1999 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Streamflow depletion by wells written by Paul M. Barlow and published by . This book was released on 2012 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessing the Connectivity of Groundwater Wells to Surface water Using a Volumetric Capture Delineation Tool written by Mashrur Anam Chowdhury and published by . This book was released on 2016 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Existing groundwater modeling methods for determining the degree of groundwater well connectivity to surface-water either provide weak guidance (i.e., analytical methods), only examine the hydrological impacts of pumping (i.e., mapping method developed by Leake et al. (2010)), or are too computationally expensive (i.e., solute transport modeling methods) (Ceric & Haitjema, 2005). As such, a modeling technique is required that can accurately estimate the amount of water a particular well sources from surface-water at low computational costs. Here, we present some novel applications of a software tool called FlowSource (Black and Foley, 2013) in assessing well and surface-water connectivity. FlowSource is a MODFLOW-based (Harbaugh et al., 2000) software and can completely describe the flow connectivity between specified parts of the aquifer system without the use of particle tracking or advective transport simulation. First, an algorithm was developed to reduce numerical dispersion in FlowSource calculations that result from the assumption of fully mixed groundwater model cells. For any given set of flows along the faces of a three-dimensional rectilinear finite-difference groundwater model cell, the algorithm can evaluate the volumetric flow from each inflow face to each outflow face by either applying mass balance inside the cell or analytically recreating the internal streamtube geometry using the semi-analytical particle tracking method developed by Pollock (1988). The calculations of the algorithm are exact. The algorithm may be applied on a cell-by-cell basis to establish the volumetric flow connections inside the cell before performing the flow connectivity calculations in FlowSource. Its potential to reduce numerical dispersion in FlowSource calculations is demonstrated with a hypothetical example. Second, a novel FlowSource-based modeling tool was developed for assessing well and surface-water connectivity. The tool deploys FlowSource within the framework of the mapping method developed by Leake et al. (2010) (the LRD method). The differences in the results of the novel tool and the LRD method are demonstrated. Numerous applications of the modeling tool are demonstrated using a synthetic model, which include the ability to rapidly: (1) screen for wells that are surface-water dominated and are at risk of contamination from non-point sources, (2) infer the volume of water removed by pumpage from surface-water and, (3) generate diagnostic maps that illustrate how the location and time of pumping affects: (a) volumetric connectivity with surface-water, (b) the connectivity of existing wells to surface-water and, (c) hyporheic flows. Most importantly, the use of FlowSource enables these assessments to be performed without performing any solute transport modeling. Hence, the modeling tool developed here has the potential to aid water managers to inexpensively assess the risks posed to public health and/or the local environment of existing and planned pumping operations so that they can effectively prioritize monitoring and modeling efforts.