Level 76
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Economic Geography and Natural Resources

Water Resources and Freshwater Security

A survey of freshwater availability, access, and conflict across the world, from major aquifers and the rivers that cross borders to the engineered dams, desalination plants, and irrigation systems that keep cities and farms supplied.

60-Second Review

Express review

A condensed, point-by-point summary of the module, for reviewing right before a test or exam.

  1. Global Freshwater Distribution and Scarcity. Only about 2.5% of Earth's water is fresh, and most of that is locked away as ice or underground.
  2. Major Aquifers and Groundwater Depletion. Vast underground aquifers supply irrigation worldwide, but many are being pumped faster than nature refills them.
  3. Dams, Reservoirs, and Water Storage. Large dams store water and generate power but reshape rivers, ecosystems, and the lives of displaced people.
  4. Transboundary Rivers and Water-Sharing Treaties. Rivers that cross borders force neighboring states into treaties, disputes, and shared institutions over water.
  5. Desalination and Alternative Water Sources. Desalination and water recycling let arid, wealthy states convert seawater and wastewater into drinking water.
  6. Urban Water Stress and Infrastructure. Fast-growing cities strain aging water infrastructure, sometimes to the point of near-total supply failure.
  7. Water and Agriculture: Irrigation Geography. Irrigation drives the majority of global freshwater use and has produced both food security and ecological disaster.
  8. Water Conflict and Cooperation Case Studies. Shared water has driven both real disputes and, empirically, far more historical cooperation than outright war.

This module continues after "Global Trade and Transportation Networks" in the syllabus. If you haven't reviewed it yet, it may help set the context.

Key points

Visual module map

1Global Freshwater Distribution and Scarcity
2Dams, Reservoirs, and Water Storage
3Desalination and Alternative Water Sources
4Urban Water Stress and Infrastructure
5Water Conflict and Cooperation Case Studies

Alternative visual view: a simplified sequence of some of the module's key points, in their order within the syllabus.

Your module mastery

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Approximate breakdown by skill
Understanding of historiographical debate0%

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Final test

You need to review all key points to unlock the final test.

Optional mini-games

Extra practice, with no penalty, to reinforce the module's content.

Review Flashcards

Review each key point with cards that flip to reveal the summary.

Memory

Match each concept with its definition in as few attempts as possible.

Time Attack

Answer true or false statements before time runs out.

Chronological Order

Put the module's key points back in their original order.

Further reading

Bibliography and cited sources used to create this module.

  • Gleick, P.H. (ed.) (1993). Water in Crisis: A Guide to the World's Fresh Water Resources. New York: Oxford University Press.
  • Postel, S. (1999). Pillar of Sand: Can the Irrigation Miracle Last? New York: W.W. Norton & Company.
  • Wolf, A.T., Yoffe, S.B., and Giordano, M. (2003). "International Waters: Identifying Basins at Risk." Water Policy, 5(1), 29-60.
  • Micklin, P. (2007). "The Aral Sea Disaster." Annual Review of Earth and Planetary Sciences, 35, 47-72.
  • Famiglietti, J.S. (2014). "The Global Groundwater Crisis." Nature Climate Change, 4, 945-948.
  • UNESCO / UN-Water (2023). The United Nations World Water Development Report 2023: Partnerships and Cooperation for Water. Paris: UNESCO.