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Thursday, May 7, 2020 | History

2 edition of USGS ground-water flow model found in the catalog.

USGS ground-water flow model

Martha L. Erwin

USGS ground-water flow model

an essential tool for managing the water supply of the Virginia coastal plain

by Martha L. Erwin

  • 322 Want to read
  • 21 Currently reading

Published by U.S. Dept. of the Interior, U.S. Geological Survey in [Reston, Va.? .
Written in English

    Subjects:
  • Groundwater flow -- Virginia -- Computer simulation.,
  • Water-supply -- Virginia -- Computer simulation.

  • Edition Notes

    Other titlesUSGS ground water flow model.
    Statement[Martha L. Erwin and E. Randolph McFarland and T. Scott Bruce].
    SeriesUSGS fact sheet -- 099-99., Fact sheet (Geological Survey (U.S.)) -- FS-99-099.
    ContributionsMcFarland, E. Randolph., Bruce, T. Scott, 1960-, Virginia. Dept. of Environmental Quality., Geological Survey (U.S.)
    The Physical Object
    Pagination[4] p. :
    ID Numbers
    Open LibraryOL18134925M

    ground-water management decisions. The model needs to be fine-tuned periodically so that it will continue to support wise ground-water manage-ment decisions into the 21st century. Population and ground-water use are increasing in the Virginia Coastal Plain. USGS Ground-Water Flow Model. The USGS, in cooperation with the Great Lakes Protection Fund, used ground-water flow models to increase the understanding of the effects of ground-water withdrawals on ground-water flow near (1) the regional ground-water divide between the Great Lakes Basin and the Mississippi River Basin and (2) areas adjoining riverine systems that are.

    The modular finite-difference ground-water flow model (MODFLOW) developed by the U.S. Geological Survey (USGS) is a computer program for simulating common features in ground-water systems (McDonald and Harbaugh, ; Harbaugh and McDonald, ). The program was constructed in the early 's and has continually evolved since then with development of many new packages and . An unambiguous definition of "groundwater model" is difficult to give, but there are many common characteristics. A groundwater model may be a scale model or an electric model of a groundwater situation or prideofaberdeenawards.comwater models are used to represent .

    Mar 30,  · U.S. Geological Survey, Texas Water Science Center, Austin, TX. Search for more papers by this author. J. J. Starn. and simulated head and groundwater‐flow directions in model layers 4 and 5 of the Upper San Pedro Basin model of Pool and Dickinson. Groundwater‐flow directions are shown for every fourth model prideofaberdeenawards.com by: Ground-Water Recharge Areas and Traveltimes to Pumped Wells, Ponds, Streams, and Coastal Water Bodies, Cape Cod, Massachusetts By Donald A. Walter, John P. Masterson, and Kathryn M. Hess Scientific Investigations Map I Prepared in cooperation with the MASSACHUSETTS DEPARTMENT OF ENVIRONMENTAL PROTECTION.


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USGS ground-water flow model by Martha L. Erwin Download PDF EPUB FB2

This report documents the Groundwater Flow (GWF) Model for a new version of MODFLOW called MODFLOW 6. The GWF Model for MODFLOW 6 is based on a generalized control-volume finite-difference approach in which a cell can be hydraulically connected to any number of surrounding cells.

Users can define the model grid using one of three discretization packages, including (1) a structured Cited by: MODFLOW the U.S. Geological Survey modular ground-water model--the ground-water flow USGS ground-water flow model book.

This report presents MODFLOW, which is a new version of the finite-difference ground-water model commonly called MODFLOW. Ground-water flow is simulated using a block-centered finite-difference approach.

A Modular Three-Dimensional Finite-Difference Ground-Water Flow Model. A Modular Three-Dimensional Finite-Difference Ground-Water Flow Model U.S. Geological Survey, Techniques of Water-Resources Investigations, Book 6, Chapter A1.

The first edition of this book was published by Prentice Hall in It has been widely recognized as one of the finest books in the field of unsaturated zone hydrology for upper division and graduate level courses, as well as ‘the’ reference book for professionals. The book was so popular it sold out of print within five years.

Cooley, R.L.,A MODular Finite-Element model (MODFE) for areal and axisymmetric ground-water-flow problems, part derivation of finite-element equations and comparisons with analytical solutions: U.S.

Geological Survey Techniques of Water-Resources Investigations, book 6, chap. Harbaugh, A.W.,Direct solution package based on alternating diagonal ordering for the U.S. Geological Survey modular finite-difference ground-water flow model: U.S. Geological Survey Open-File Report46 p.

DE45 Package documentation, PostScript (K). Harbaugh, A.W.,MODFLOW, the U.S. Geological Survey modular ground-water model -- the Ground-Water Flow Process: U.S. Geological Survey Techniques and Methods 6-A This report describes the theory and input instructions at the time of the initial MODFLOW v release.

Online MODFLOW User's Guide. Ground-water flow within the aquifer is simulated using a block-centered finite-difference approach. Layers can be simulated as confined, unconfined, or a combination of confined and unconfined.

Flow from external stresses, such as flow to wells, areal recharge, evapotranspiration, flow to drains, and flow through riverbeds, can also be simulated. U.S. Geological Survey hydrologic models can provide insights that water-resource managers in California need to plan effectively for future water demands and answer scientific and management questions.

Data from USGS groundwater models may help water resource managers meet Sustainable Groundwater Management Act (SGMA) requirements. USGS Store. USGS Store. My Account | Sign In Create Account. Home OTEQ REACTIVE TRANSPORT MODEL STREAMS. Water-Resources Investigations Reports (WRIR) Water-Resources Investigations Reports (WRIR) Featured Product: SHALLOW GROUND WATER IN RESIDENTIAL AREA.

Water-Supply Papers (WSPs) Water-Supply Papers (WSPs) Featured Product. Oct 29,  · MODFLOW, the U.S. Geological Survey Modular Ground-Water Model–Documentation of the SEAWAT Version with the Variable-Density Flow Process (VDF) and the Integrated MT3DMS Transport Process (IMT) (OFR, from the Water Resources of.

Calibration targets were hydraulic heads, surface-water fluxes, vertical gradients, and ground-water infiltration to the ISS. Simulation of ground-water flow by use of the MODFLOW model indicates that about 73 percent of recharge within the MODFLOW domain circulates to the ISS and 27 percent discharges to gaining surface-water bodies.

When parameters are used several input values may be linked because they are both controlled by the same parameter. In the Groundwater Flow process, parameters are simply another way of specifying input.

However, parameters make automatic model calibration possible through the use of the Observation, Sensitivity, and Parameter-Estimation processes.

"A computer model of regional ground-water flow developed by the USGS is used by the Virginia Department of Environmental Quality(DEQ) to permit new water-supply wells and to assess long-term stresses to the ground-water system"--Page [1].

Description: 4 unnumbered pages: color illustrations, color maps ; 28 cm. Series Title. Jan 13,  · The north alluvial ground-water flow model (north model) by Reed () was developed to assist ground-water managers with assessing the impact of future stresses induced by ground-water withdrawals on ground-water levels.

The north model had water-use data from as its most-recently compiled water-use dataset and water-level altitude data.

A transient ground-water flow-model calibration attempts to account for the effects of time-variant stresses, such as ground-water withdrawal or anthropogenically induced ground-water recharge, on ground-water systems. U.S. Geological Survey Techniques of Water-Resources Investigations, book 6, chap.

A1, p. McLean, J.S.,Saline. EFFECTIVE GROUNDWATER MODEL CALIBRATION: With Analysis Of Data, Sensitivities, Predictions, and Uncertainty By Mary C. Hill and Claire R. Tiedeman Computer Instructions for the Exercises, using four U.S.

MODFLOW prideofaberdeenawards.com Ground-water flow model. GROUNDWATER FLOW MODELS. MODFLOW, is the most widely-used ground-water flow model in the. world. But, linked with the USGS groundwater flow simulator, MODFLOW, and is designed. PUBLICATIONS ON TECHNIQUES OF WATER-RESOURCES INVESTIGATIONS—Continued 3-B4.

Regression modeling of ground-water flow, by R.L. Cooley and R.L. Naff: USGS–TWRI book 3, chap. 3-B4. Supplement 1. Regression modeling of ground-water flow--Modifications to the computer code for nonlinear regression solution of steady-state ground-water flow problems, by R.L.

References for Ground Water Data or Model Report Submittals & Sources of Information for Required Data References & Citations A review of previously submitted ground water data and model reports was conducted, and a list of commonly used references was complied to serve as a starting place to find information required by.

MODFLOW is the U.S. Geological Survey modular finite-difference flow model, which is a computer code that solves the groundwater flow prideofaberdeenawards.com program is used by hydrogeologists to simulate the flow of groundwater through prideofaberdeenawards.com source code is free public domain software, written primarily in Fortran, and can compile and run on Microsoft Windows or Unix-like operating systems.Ground-Water Flow and Contributing Areas to Public -Supply Wells in Kingsford and Iron Mountain, Michigan A.W.,A modular three-dimensional finite-difference ground-water flow model: U.S.

Geological Survey Techniques of Water-Resources Investigations, Book 6, Chap. A1, p. McDonald, M.G., and Harbaugh.FUNDAMENTALS OF GROUNDWATER MODELLING. an update to the U.S. Geological Survey modular finite-difference ground-water flow model a need to Author: Husam Baalousha.