By Sonia A. Hall
The Columbia River is fed by snowmelt from surrounding mountains. These waters are used for irrigating crops, as well as other uses. Snowmelt patterns are expected to change across the world as the climate continues to warm. Photo: Flickr user jaisril under CC BY-NC-ND 2.0.
It is not always easy to extract regionally-relevant conclusions from global studies, such as the one discussed in the August 2020 CIRCulator article “Irrigated Agriculture, Snowmelt, and Climate Change.” So though many of the irrigation-dependent crops studied are not typical to the Pacific Northwest, this article discusses research that synthesizes key risk factors—whether a basin is currently dependent on snowmelt for irrigation water; how far out of sync water supplies and agricultural demand will become; can a basin realistically find new ways to store water, replacing the snowpack’s storage capacity—into a snowmelt hazard index. Big, global picture: The Columbia River Basin is expected to do better than watersheds to the south and the east, but overall received what the CIRCulator article called “a middling-but-still-worrisome snow hazard scale rating,” putting it, interestingly enough, right “next to the Tigris/Euphrates Basin.” Check out the CIRCulator article for a lot more detail, or, if you have access through a library or subscription, delve into the actual publication in Nature Climate Change.
Qin, Y., Abatzoglou, J.T., Siebert, S., Huning, L.S., AghaKouchak, A., Mankin, J.S., Hong, C., Tong, D., Davis, S.J. and Mueller, N.D., 2020. Agricultural risks from changing snowmelt. Nature Climate Change, 10(5), pp.459-465. https://doi.org/10.1038/s41558-020-0746-8.