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Geologic Frameworks for Groundwater Flow Models

Publication year: 2020
Number of pages: 25
ISBN: 978-1-7770541-9-9

Author:
J. P. Brandenburg
Senior Geologist
Haley & Aldrich, Incorporated
Ann Arbor, Michigan, United States

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Book Description

Groundwater modelers should be familiar with and have access to systematic methods for translating physical subsurface geology into a numerical representation. Other hydrogeologists will benefit from understanding the process. This book introduces techniques for creating the underlying geologic framework of groundwater flow models. It is arranged around a hypothetical site with contaminated groundwater, beginning with a discussion of data collection and geologic interpretation, then delves into the steps required to build a realistic numerical model. The reader will find that many of the methods and calculations can be applied with tools as simple as paper and pencil. Links to publicly available computing resources are provided where possible.

Contents

1 OVERVIEW

2 INTRODUCTION

3 CONTEXT AND PURPOSE

3.1 Conceptual Models

3.2 Local Geology

3.3 Structural Geology

3.4 Stratigraphy

4 BUILDING A FRAMEWORK

4.1 Maps and Cross Sections

4.2 Surfaces

4.3 Gridding

5 CALCULATING PROPERTIES

5.1 Gross Thickness

5.2 Net Thickness

5.3 Net to Gross Ratio

5.4 Properties

6 THE MODEL

7 BUILDING A STATIC MODEL FROM FACIES MAPPING

8 BUILDING A STATIC MODEL FROM UPSCALED PROPERTIES

9 BUILDING A STATIC MODEL FROM LITHOLOGIC DATA

10 SUMMARY

11 REFERENCES

12 EXERCISES

Exercise 1
Exercise 2
Exercise 3

BOX 1 GRIDDING SPARSE DATA

13 EXERCISE SOLUTIONS

Exercise 1 – Solution
Exercise 2 – Solution
Exercise 3 – Solution

14 ABOUT THE AUTHOR