Holistic Humanities

Why are some of the world’s most productive farming regions running short of water?

Every week in Joined Up Geography, we take a story from the news and use it to explore the connections between people, places, environments and the wider world.

This week, we’re looking beneath our feet.

Recent reports from the US Geological Survey (USGS) have highlighted continuing groundwater declines in parts of the Ogallala Aquifer, a vast underground water store beneath the Great Plains of the United States. For decades, this hidden resource has supported one of the world’s most productive farming regions. Yet in many places, water is being used faster than nature can replace it.

At first glance, this might seem like a local issue.

But geographers ask bigger questions.

Why are some of the world’s most productive farming regions running short of water? How do underground water stores work? What happens when demand exceeds supply? And can water resources be managed sustainably for future generations?

As we follow the story, we’ll discover that this isn’t just about one aquifer in one country. Similar challenges can be found in California, India, China, Australia and even here in the United Kingdom.

Topic Overview

In this session we will explore:

– What groundwater is and how aquifers work
– Why farmers rely on groundwater
– The Ogallala Aquifer and its importance to food production
– Why groundwater levels are falling in some regions
– Similar water challenges around the world
– Whether groundwater can be used sustainably
– What water security might look like in the future

Case Studies & Further Reading

United States

Ogallala Aquifer (USGS)
https://www.usgs.gov/mission-areas/water-resources/science/high-plains-aquifer

California Central Valley Groundwater (NASA)
https://www.nasa.gov/mission_pages/grace/news/california-drought-groundwater.html

India

Groundwater and Water Security (UNESCO)
https://www.unesco.org/en/articles/groundwater-making-invisible-visible

China

North China Plain Groundwater Management (World Bank)
https://www.worldbank.org/en/news/feature/2021/03/22/china-groundwater-management

Australia

Murray–Darling Basin Authority
https://www.mdba.gov.au

United Kingdom

British Geological Survey: Groundwater and Aquifers
https://www.bgs.ac.uk/geology-projects/groundwater-information/

Who Is This For?

Joined Up Geography is an online geography discussion and enquiry group for home-educated pre-teens and teens.

🗓 Mondays at 11am

Suitable for curious learners aged approximately 10–16. No prior knowledge is required—just an interest in understanding the world and how it works.

Using current news stories as our starting point, we investigate how physical geography, human geography, environmental change, politics, economics and sustainability are all connected.

To book a place or ask questions, email: garychampion@gmail.com