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High and DryMeeting the Challenges of the World's Growing Dependence on Groundwater$
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William M Alley and Rosemarie Alley

Print publication date: 2017

Print ISBN-13: 9780300220384

Published to Yale Scholarship Online: September 2017

DOI: 10.12987/yale/9780300220384.001.0001

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PRINTED FROM YALE SCHOLARSHIP ONLINE (www.yale.universitypressscholarship.com). (c) Copyright Yale University Press, 2020. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in YSO for personal use.date: 31 May 2020

Not All Aquifers Are Created Equal

Not All Aquifers Are Created Equal

Chapter:
(p.68) 5 Not All Aquifers Are Created Equal
Source:
High and Dry
Author(s):

William M. Alley

Rosemarie Alley

Publisher:
Yale University Press
DOI:10.12987/yale/9780300220384.003.0005

This chapter examines how geology and climate create vastly different groundwater situations. Effective management of groundwater depends upon full consideration of these differences. The chapter begins with a distinction between confined and unconfined aquifers and a look at artesian wells, with a focus on Australia’s Great Artesian Basin. The characteristics of different rock types are illustrated by four basic aquifer rock types in sub-Saharan Africa. The chapter then turns to non-renewable aquifers in North Africa and Saudi Arabia. The fast-recharging Edwards Aquifer in Texas then provides a quite different story with its sensitivity to short-term climate variability and concerns about endangered species. The chapter concludes with a discussion of saltwater intrusion in coastal aquifers and the potential of brackish groundwater for water supply.

Keywords:   aquifer rock types, artesian well, brackish groundwater, Edwards Aquifer, non-renewable aquifers, saltwater intrusion

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