A Generalized Finite-Difference Formulation for the U.S. Geological Survey Modular Three-Dimensional Finite-Difference Ground-Water Flow Model

U.S. Geological Survey, Open-File Report 91-494

by Arlen W. Harbaugh

Table of Contents

Abstract

Introduction

Implementation

General Finite-Difference Flow Package

Conductance

Horizontal conductance for confined model layers

Horizontal conductance for unconfined and convertible model layers

Vertical conductance

Vertical flow calculation under dewatered conditions

Storage terms

Applicability and limitations of optional formulations

Data requirements

Input instructions

Sample problem

Module documentation

GFD1AL Module

GFD1RP Module

GFD1FM Module

GFD1BD Module

SGFD1N Module

SGFD1H Module

SGFD1B Module

SGFD1F Module

References cited

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U.S. Department of the Interior, U.S. Geological Survey Persistent URL: http://pubsdata.usgs.gov/pubs/of/1991/ofr91494/html/toc.html Page Contact Information: USGS Publishing Network Last modified: Wednesday, December 07 2016, 07:32:53 PM

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