With water scarcity looming, the question of sustainable irrigation is paramount. Could a large-scale project, designed in a different era, hold the answers we need? Learn why the Columbia Basin Irrigation Project is sparking conversations about drought-proofing and the future of agriculture.

The Columbia Basin Irrigation Project; As Drought-Proof and Sustainable as it Gets

By Andrew McGuire, CSANR

Irrigation Systems and Food Production

Irrigated agriculture is critical, supplying 40% of the world’s food despite having only 28% of cropland. Irrigation also stabilizes food production by separating crop yields from the risk of variable rainfall (Troy et al., 2015). However, history reveals that most irrigation systems eventually fail. In Pillar of Sand, Sandra Postel discusses how irrigation-dependent civilizations collapsed due to these shared failure factors (Postel, 1999; Elias et al., 2023):

1. Changes in water supply
2. Sedimentation
3. Salinization of the soil
4. Failure to maintain the system

Modern irrigation systems face these same challenges. Drought, water scarcity, and soil degradation are on the rise. And climate change is expected to quadruple seasonal heat and rainfall variability by 2040, threatening the stability of crop yields (Troy et al. 2015; Walker et al., 2019). The Columbia Basin Irrigation Project (CBP) in Washington State has been producing food for over 70 years, but can that be sustained? Or will it fail from the same challenges that took down other irrigation systems? This analysis examines CBP’s sustainability by assessing its resilience to the four primary threats that have affected irrigation systems globally.

Read more about the project here: https://csanr.wsu.edu/the-columbia-basin-irrigation-project-as-drought-proof-and-sustainable-as-it-gets/