Groundwater Management: A Critical Component of Global Water Security

Strategic Insights -

The management of groundwater, often the only source of water supply in vast regions of Australia, is a pressing issue due to overuse and depletion. The annual contribution of groundwater to Australia's GDP is estimated at more than $6.8 billion, but reactive management approaches have led to water crises in areas such as the Murray-Darling Basin. The United Nations has warned that large tracts of highly populated and arid regions may face dire water shortages if more regulations are not put in place on groundwater management.

Key Takeaways:

  • Groundwater accounts for 97% of the world's fresh water, with 43% used for drinking water and 22% for domestic uses.
  • The agricultural sector uses approximately 69% of the total volume of groundwater, while industrial purposes account for 9%.
  • The Murray-Darling Basin in Australia is a critical example of groundwater depletion, with the irrigation district of Angas Bremer reducing groundwater extractions by 80% through co-management plans.
  • The UN World Water Development Report 2022 highlights the need for better management of groundwater resources, with a forecast 40% water deficit by 2030 under a business-as-usual scenario.
  • Examples of success in groundwater management, such as the Angas Bremer irrigation district, can provide valuable lessons for the future, including the importance of local collective action and trust-building between stakeholders.
  • The use of groundwater for drinking water, irrigation, and industry is critical, but overuse and depletion can lead to severe consequences, including water crises and ecosystem damage.

Statistics:

  • Groundwater supplies half of the world's drinking water.
  • The agricultural sector uses approximately 69% of the total volume of groundwater.
  • The Murray-Darling Basin in Australia has seen a significant reduction in groundwater extractions, from 80% to a sustainable level.
  • The fresh water available on earth lies in the ground beneath our feet, accounting for 97% of the total.
  • The world faces a 40% water deficit by 2030 under a business-as-usual scenario, according to a 2009 World Resources Group report.

Sources:

  • UN World Water Development Report 2022
  • Flinders University Distinguished Professor of Hydrogeology Craig Simmons' online public lecture "Groundwater -- The Invisible Resource"
  • Journal of Hydrology article "Coming together: Insights from an Australian example of collective action to co-manage groundwater"